O-o .o-o. o-O

d

.github/ISSUE_TEMPLATE/bug.yml

@@ -40,6 +40,9 @@ body:
         - 1.17.1
         - 1.18
         - 1.19
+        - 1.20
+        - 1.21
+        - 1.22
     validations:
       required: true
   - type: input

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  verify:
+    name: Verify (core, plugin, spi, probes)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '25'
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v4
+      - name: Run verification gates
+        run: ./gradlew :core:check :adapters:bukkit:plugin:test :spi:build :probe:test :probe:run :probe:deserializationProbe -PuseLocalVolmLib=false --console=plain --stacktrace
+      - name: Run modded shared tests
+        run: ./gradlew -p adapters/fabric test -PuseLocalVolmLib=false --console=plain --stacktrace

.gitignore

@@ -1,5 +1,6 @@
 
 build/
+libs/
 
 .gradle/
 
@@ -9,4 +10,33 @@ build/
 
 collection/
 
-src/main/java/com/volmit/iris/util/uniques/
+out/
+tools/simd-bench/out/
+tools/simd-bench/simd-bench.jar
+
+DataPackExamples/
+
+TreeGenStuff/
+dist/
+core/plugins/
+adapters/bukkit/plugin/plugins/
+adapters/*/run/
+
+.codegraph/
+
+plans/
+
+.env
+.env.*
+!.env.example
+local.properties
+*.jks
+*.p12
+*.pfx
+*.pem
+*.key
+*.hprof
+credentials.json
+service-account*.json
+
+docs/

README.md

@@ -1,77 +1,136 @@
 # Iris
 
-The master branch is for the latest version of minecraft.
+Iris is a world generation engine for Minecraft servers and mod loaders. It generates terrain,
+biomes, caves, structures, objects, and entities from editable JSON packs, with a full in-game
+studio authoring workflow. The same engine runs as a Bukkit-family plugin and as a Fabric, Forge,
+or NeoForge server mod, and produces bit-identical terrain on every platform for the same pack and
+seed. The master branch targets the current Minecraft version (26.2).
 
 # [Support](https://discord.gg/3xxPTpT) **|** [Documentation](https://docs.volmit.com/iris/) **|** [Git](https://github.com/IrisDimensions)
 
-# Building
+Consider supporting development by buying Iris on Spigot.
 
-Building Iris is fairly simple, though you will need to setup a few things if your system has never been used for java
-development.
+## Platforms
 
-Consider supporting our development by buying Iris on spigot! We work hard to make Iris the best it can be for everyone.
+| Platform | Artifact | Minecraft | Notes |
+|---|---|---|---|
+| Paper / Purpur / Leaf / Canvas | plugin jar | 26.2 | Full feature set |
+| Folia | plugin jar | 26.2 | Region-safe scheduling throughout |
+| Spigot / CraftBukkit | plugin jar | 26.2 | Full feature set |
+| Fabric | mod jar | 26.2 | Server worldgen + client HUD; requires Fabric Loader 0.19.3+ |
+| Forge | mod jar | 26.2 | Server worldgen + client HUD; requires Forge 65.0.0+ |
+| NeoForge | mod jar | 26.2 | Server worldgen + client HUD; requires NeoForge 26.2+ |
 
-### Command Line Builds
+Java 25 is required on every platform.
 
-1. Install [Java JDK 17](https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html)
-2. Set the JDK installation path to `JAVA_HOME` as an environment variable.
-    * Windows
-        1. Start > Type `env` and press Enter
-        2. Advanced > Environment Variables
-        3. Under System Variables, click `New...`
-        4. Variable Name: `JAVA_HOME`
-        5. Variable Value: `C:\Program Files\Java\jdk-17.0.1` (verify this exists after installing java don't just copy
-           the example text)
-    * MacOS
-        1. Run `/usr/libexec/java_home -V` and look for Java 17
-        2. Run `sudo nano ~/.zshenv`
-        3. Add `export JAVA_HOME=$(/usr/libexec/java_home)` as a new line
-        4. Use `CTRL + X`, then Press `Y`, Then `ENTER`
-        5. Quit & Reopen Terminal and verify with `echo $JAVA_HOME`. It should print a directory
-3. If this is your first time building Iris for MC 1.18+ run `gradlew setup` inside the root Iris project folder.
-   Otherwise, skip this step. Grab a coffee, this may take up to 5 minutes depending on your cpu & internet connection.
-4. Once the project has setup, run `gradlew iris`
-5. The Iris jar will be placed in `Iris/build/Iris-XXX-XXX.jar` Enjoy! Consider supporting us by buying it on spigot!
+The modded feature set matches the plugin wherever the operation is not Bukkit-bound: worldgen
+from Iris packs, authoring with mod blocks/items/entities (with validation suggestions), studio
+workspaces with schema autocomplete over the server's live registries, entity spawning parity
+including death loot, pregeneration with a boss bar or client HUD, the `/iris` command tree, and
+the goldenhash determinism gate, which is interchangeable across all four platforms.
 
-### IDE Builds (for development)
+## Install
 
-* Run `gradlew setup` any time you get dependency issues with craftbukkit
-* Configure ITJ Gradle to use JDK 17 (in settings, search for gradle)
-* Add a build line in the build.gradle for your own build task to directly compile Iris into your plugins folder if you
-  prefer.
-* Resync the project & run your newly created task (under the development folder in gradle tasks!)
+**Plugin (Paper/Purpur/Leaf/Canvas/Folia/Spigot):** drop the plugin jar into `plugins/` and start
+the server. On first boot Iris downloads the default `overworld` pack automatically.
 
-# Iris Toolbelt
+**Mod (Fabric/Forge/NeoForge):** drop the mod jar into `mods/` and start the server. The jar is
+self-contained (core, SPI, and required Fabric API modules are bundled). On first boot Iris
+downloads the default `overworld` pack before the worldgen datapack is written, so the default
+pack is fully active immediately. Packs installed later register their custom dimension types
+(height ranges) and custom biomes through the forced datapack at server start — restart once after
+adding a pack so worlds get its full heights and biomes; worlds created before that restart run
+with fallback heights.
 
-Everyone needs a tool-belt.
+**Singleplayer (modded clients):** installed Iris packs appear as selectable World Types on the
+Create New World screen; the integrated server runs the same engine.
 
-```java
-package com.volmit.iris.core.tools;
+## The client mod
 
-// Get IrisDataManager from a world
-IrisToolbelt.access(anyWorld).getCompound().getData();
+Installing the mod jar on a client adds a native pregeneration HUD: a top-left panel with a
+progress bar, chunks done/total, percent, chunks per second, and ETA, turning yellow while the
+pregen is paused. The `H` key (rebindable, under the "Iris" controls category) toggles it.
 
-// Get Default Engine from world
-IrisToolbelt.access(anyWorld).getCompound().getDefaultEngine();
+The HUD works against modded Iris servers and against Bukkit/Paper Iris servers, both over the
+`irisworldgen:main` channel (custom payloads on modded, plugin messaging on Bukkit). Vanilla
+clients are unaffected and get the server-side boss bar instead; on non-Iris servers the client
+mod is inert.
 
-// Get the engine at the given height
-IrisToolbelt.access(anyWorld).getCompound().getEngineForHeight(68);
+## Quickstart
 
-// IS THIS THING ON?
-boolean yes=IrisToolbelt.isIrisWorld(world);
+Create and enter an Iris world.
 
-// GTFO for worlds (moves players to any other world, just not this one)
-IrisToolbelt.evacuate(world);
+Plugin (optional arguments are keyed):
 
-IrisAccess access=IrisToolbelt.createWorld() // If you like builders...
-  .name("myWorld") // The world name
-  .dimension("terrifyinghands")
-  .seed(69133742) // The world seed
-  .headless(true)  // Headless make gen go fast
-  .pregen(PregenTask // Define a pregen job to run
-  .builder()
-    .center(new Position2(0,0)) // REGION coords (1 region = 32x32 chunks)
-    .radius(4)  // Radius in REGIONS. Rad of 4 means a 9x9 Region map.
-    .build())
-  .create();
 ```
+/iris create myworld type=overworld seed=1337
+/iris load myworld
+```
+
+Mod (positional arguments):
+
+```
+/iris create myworld overworld 1337
+```
+
+Pregeneration requires a radius in blocks. On the plugin, optional arguments are keyed; on modded
+servers they are positional and composable:
+
+```
+/iris pregen start 352 world=myworld center=0,0 gui=false
+/iris pregen start 352 irisworldgen:myworld at 0 0 sync
+```
+
+Players with the client mod see the native HUD; everyone else gets a boss bar (modded) or
+console/status output. `/iris pregen status` reports progress on the plugin.
+
+## Studio and VSCode workspace
+
+The studio is the pack authoring environment, available on all platforms. Studio worlds are
+transient — they are deleted on close and purged at startup.
+
+```
+/iris studio create <name> [template]   scaffold a new pack (default template: example)
+/iris studio open <pack> [seed]         open a temporary studio world for live editing
+/iris studio vscode [pack]              write a .code-workspace with JSON schemas
+/iris studio update [pack]              regenerate the workspace schemas
+/iris studio close                      close and discard the studio world
+```
+
+As in the quickstart, optional arguments are keyed on the plugin (`seed=1234`) and positional on
+the mod.
+
+The generated VSCode workspace wires per-type JSON schemas (dimensions, biomes, regions, objects,
+loot, entities, snippets) for full autocomplete. Schemas are generated from the server's live
+registries, so on modded servers block, item, entity, enchantment, and potion-effect completion
+includes installed mod content (for example `create:brass_ingot`). Editing an open studio's pack
+files hotloads the changes and regenerates the schemas.
+
+## Building from source
+
+Requirements: JDK 25 (set `JAVA_HOME` to it). The Gradle wrapper handles everything else.
+
+```
+./gradlew buildAllToOut
+```
+
+builds every platform artifact into `dist/`:
+
+```
+Iris v<version> [CraftBukkit] <mc>.jar
+Iris v<version> [Fabric] <mc>+<loader>.jar
+Iris v<version> [Forge] <mc>+<loader>.jar
+Iris v<version> [NeoForge] <mc>+<loader>.jar
+```
+
+Per-platform tasks: `./gradlew buildBukkit`, `buildFabric`, `buildForge`, `buildNeoforge`. The
+developer SPI jar (the pure-JVM platform API contract) is built to `spi/build/libs/` by
+`./gradlew :spi:jar`.
+
+If you need help compiling as a developer or contributor, ask in the Discord. Do not come to the
+Discord asking for free copies or a compile tutorial.
+
+## Maintainer docs
+
+- [Minecraft version bump checklist](docs/mc-version-bump.md)
+- [Release checklist](docs/release-checklist.md)

adapters/bukkit/nms/v26_2_R1/src/main/java/art/arcane/iris/core/nms/v26_2_R1/CustomBiomeSource.java

@@ -0,0 +1,438 @@
+package art.arcane.iris.core.nms.v26_2_R1;
+
+import com.mojang.serialization.MapCodec;
+import art.arcane.iris.spi.IrisLogging;
+import art.arcane.iris.engine.data.cache.AtomicCache;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisBiomeCustom;
+import art.arcane.volmlib.util.collection.KMap;
+import art.arcane.volmlib.util.math.RNG;
+import net.minecraft.core.Holder;
+import net.minecraft.core.Registry;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.BiomeSource;
+import net.minecraft.world.level.biome.Climate;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.CraftWorld;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.IdentityHashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+public class CustomBiomeSource extends BiomeSource {
+    private static final int NOISE_BIOME_CACHE_MAX = 262144;
+
+    private final long seed;
+    private final Engine engine;
+    private final Registry<Biome> biomeCustomRegistry;
+    private final Registry<Biome> biomeRegistry;
+    private final AtomicCache<RegistryAccess> registryAccess = new AtomicCache<>();
+    private final KMap<String, Holder<Biome>> customBiomes;
+    private final Map<Biome, Holder<Biome>> vanillaSpawnBiomes;
+    private final Holder<Biome> fallbackBiome;
+    private final ConcurrentHashMap<Long, Holder<Biome>> noiseBiomeCache = new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<Long, Holder<Biome>> structureBiomeCache = new ConcurrentHashMap<>();
+
+    public CustomBiomeSource(long seed, Engine engine, World world) {
+        this.engine = engine;
+        this.seed = seed;
+        this.biomeCustomRegistry = registry().lookup(Registries.BIOME).orElse(null);
+        this.biomeRegistry = ((RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer())).lookup(Registries.BIOME).orElse(null);
+        this.fallbackBiome = resolveFallbackBiome(this.biomeRegistry, this.biomeCustomRegistry);
+        this.customBiomes = fillCustomBiomes(this.biomeCustomRegistry, engine, this.fallbackBiome);
+        this.vanillaSpawnBiomes = fillVanillaSpawnBiomes(this.biomeCustomRegistry, this.biomeRegistry, engine);
+    }
+
+    private static List<Holder<Biome>> getAllBiomes(Registry<Biome> customRegistry, Registry<Biome> registry, Engine engine, Holder<Biome> fallback) {
+        LinkedHashSet<Holder<Biome>> biomes = new LinkedHashSet<>();
+        if (fallback != null) {
+            biomes.add(fallback);
+        }
+
+        for (IrisBiome i : engine.getAllBiomes()) {
+            Holder<Biome> vanillaHolder = NMSBinding.biomeToBiomeBase(registry, i.getVanillaDerivative());
+            if (vanillaHolder != null) {
+                biomes.add(vanillaHolder);
+            } else if (!i.isCustom() && fallback != null) {
+                biomes.add(fallback);
+            }
+
+            if (i.isCustom()) {
+                for (IrisBiomeCustom j : i.getCustomDerivitives()) {
+                    Holder<Biome> customHolder = resolveCustomBiomeHolder(customRegistry, engine, j.getId());
+                    if (customHolder != null) {
+                        biomes.add(customHolder);
+                    } else if (fallback != null) {
+                        biomes.add(fallback);
+                    }
+                }
+            }
+        }
+
+        return new ArrayList<>(biomes);
+    }
+
+    private static Object getFor(Class<?> type, Object source) {
+        Object o = fieldFor(type, source);
+
+        if (o != null) {
+            return o;
+        }
+
+        return invokeFor(type, source);
+    }
+
+    private static Object fieldFor(Class<?> returns, Object in) {
+        return fieldForClass(returns, in.getClass(), in);
+    }
+
+    private static Object invokeFor(Class<?> returns, Object in) {
+        for (Method i : in.getClass().getMethods()) {
+            if (i.getReturnType().equals(returns)) {
+                i.setAccessible(true);
+                try {
+                    IrisLogging.debug("[NMS] Found " + returns.getSimpleName() + " in " + in.getClass().getSimpleName() + "." + i.getName() + "()");
+                    return i.invoke(in);
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+
+        return null;
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <T> T fieldForClass(Class<T> returnType, Class<?> sourceType, Object in) {
+        for (Field i : sourceType.getDeclaredFields()) {
+            if (i.getType().equals(returnType)) {
+                i.setAccessible(true);
+                try {
+                    IrisLogging.debug("[NMS] Found " + returnType.getSimpleName() + " in " + sourceType.getSimpleName() + "." + i.getName());
+                    return (T) i.get(in);
+                } catch (IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    protected Stream<Holder<Biome>> collectPossibleBiomes() {
+        return getAllBiomes(
+                ((RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer()))
+                        .lookup(Registries.BIOME).orElse(null),
+                ((CraftWorld) engine.getWorld().realWorld()).getHandle().registryAccess().lookup(Registries.BIOME).orElse(null),
+                engine,
+                fallbackBiome).stream();
+    }
+
+    private KMap<String, Holder<Biome>> fillCustomBiomes(Registry<Biome> customRegistry, Engine engine, Holder<Biome> fallback) {
+        KMap<String, Holder<Biome>> m = new KMap<>();
+        if (customRegistry == null) {
+            return m;
+        }
+
+        for (IrisBiome i : engine.getAllBiomes()) {
+            if (i.isCustom()) {
+                for (IrisBiomeCustom j : i.getCustomDerivitives()) {
+                    Holder<Biome> holder = resolveCustomBiomeHolder(customRegistry, engine, j.getId());
+                    if (holder == null) {
+                        if (fallback != null) {
+                            m.put(j.getId(), fallback);
+                        }
+                        IrisLogging.error("Cannot find biome for IrisBiomeCustom " + j.getId() + " from engine " + engine.getName());
+                        continue;
+                    }
+                    m.put(j.getId(), holder);
+                }
+            }
+        }
+
+        return m;
+    }
+
+    private Map<Biome, Holder<Biome>> fillVanillaSpawnBiomes(Registry<Biome> customRegistry, Registry<Biome> registry, Engine engine) {
+        IdentityHashMap<Biome, Holder<Biome>> spawnBiomes = new IdentityHashMap<>();
+        if (customRegistry == null || registry == null) {
+            return Collections.unmodifiableMap(spawnBiomes);
+        }
+
+        for (IrisBiome irisBiome : engine.getAllBiomes()) {
+            if (!irisBiome.isCustom()) {
+                continue;
+            }
+            Holder<Biome> vanillaHolder = NMSBinding.biomeToBiomeBase(registry, irisBiome.getVanillaDerivative());
+            if (vanillaHolder == null) {
+                continue;
+            }
+            for (IrisBiomeCustom customBiome : irisBiome.getCustomDerivitives()) {
+                Holder<Biome> customHolder = resolveCustomBiomeHolder(customRegistry, engine, customBiome.getId());
+                if (customHolder != null) {
+                    spawnBiomes.putIfAbsent(customHolder.value(), vanillaHolder);
+                }
+            }
+        }
+
+        return Collections.unmodifiableMap(spawnBiomes);
+    }
+
+    Holder<Biome> getVanillaSpawnBiome(Holder<Biome> biome) {
+        if (biome == null) {
+            return null;
+        }
+        return vanillaSpawnBiomes.get(biome.value());
+    }
+
+    private RegistryAccess registry() {
+        return registryAccess.aquire(() -> (RegistryAccess) getFor(RegistryAccess.Frozen.class, ((CraftServer) Bukkit.getServer()).getHandle().getServer()));
+    }
+
+    @Override
+    protected MapCodec<? extends BiomeSource> codec() {
+        throw new UnsupportedOperationException("Not supported");
+    }
+
+    @Override
+    public Holder<Biome> getNoiseBiome(int x, int y, int z, Climate.Sampler sampler) {
+        long cacheKey = packNoiseKey(x, y, z);
+        Holder<Biome> cachedHolder = structureBiomeCache.get(cacheKey);
+        if (cachedHolder != null) {
+            return cachedHolder;
+        }
+
+        Holder<Biome> resolvedHolder = resolveStructureBiomeHolder(x, y, z);
+        Holder<Biome> existingHolder = structureBiomeCache.putIfAbsent(cacheKey, resolvedHolder);
+        if (existingHolder != null) {
+            return existingHolder;
+        }
+
+        if (structureBiomeCache.size() > NOISE_BIOME_CACHE_MAX) {
+            structureBiomeCache.clear();
+        }
+
+        return resolvedHolder;
+    }
+
+    public Holder<Biome> getVisibleNoiseBiome(int x, int y, int z, Climate.Sampler sampler) {
+        long cacheKey = packNoiseKey(x, y, z);
+        Holder<Biome> cachedHolder = noiseBiomeCache.get(cacheKey);
+        if (cachedHolder != null) {
+            return cachedHolder;
+        }
+
+        Holder<Biome> resolvedHolder = resolveVisibleBiomeHolder(x, y, z);
+        Holder<Biome> existingHolder = noiseBiomeCache.putIfAbsent(cacheKey, resolvedHolder);
+        if (existingHolder != null) {
+            return existingHolder;
+        }
+
+        if (noiseBiomeCache.size() > NOISE_BIOME_CACHE_MAX) {
+            noiseBiomeCache.clear();
+        }
+
+        return resolvedHolder;
+    }
+
+    private Holder<Biome> resolveStructureBiomeHolder(int x, int y, int z) {
+        BiomeResolution resolution = resolveBiomeResolution(x, y, z);
+        if (resolution == null) {
+            return getFallbackBiome();
+        }
+
+        Holder<Biome> holder = NMSBinding.biomeToBiomeBase(biomeRegistry, resolution.irisBiome.getVanillaDerivative());
+        if (holder != null) {
+            return holder;
+        }
+
+        if (resolution.irisBiome.isCustom()) {
+            return resolveCustomHolder(resolution);
+        }
+
+        return getFallbackBiome();
+    }
+
+    private Holder<Biome> resolveVisibleBiomeHolder(int x, int y, int z) {
+        BiomeResolution resolution = resolveBiomeResolution(x, y, z);
+        if (resolution == null) {
+            return getFallbackBiome();
+        }
+
+        if (resolution.irisBiome.isCustom()) {
+            return resolveCustomHolder(resolution);
+        }
+
+        org.bukkit.block.Biome vanillaBiome = resolution.underground
+                ? resolution.irisBiome.getGroundBiome(resolution.rng, engine, resolution.blockX, resolution.blockY, resolution.blockZ)
+                : resolution.irisBiome.getSkyBiome(resolution.rng, engine, resolution.blockX, resolution.blockY, resolution.blockZ);
+        Holder<Biome> holder = NMSBinding.biomeToBiomeBase(biomeRegistry, vanillaBiome);
+        if (holder != null) {
+            return holder;
+        }
+
+        return getFallbackBiome();
+    }
+
+    private Holder<Biome> resolveCustomHolder(BiomeResolution resolution) {
+        IrisBiomeCustom customBiome = resolution.irisBiome.getCustomBiome(resolution.rng, engine, resolution.blockX, resolution.blockY, resolution.blockZ);
+        if (customBiome != null) {
+            Holder<Biome> holder = customBiomes.get(customBiome.getId());
+            if (holder != null) {
+                return holder;
+            }
+        }
+
+        return getFallbackBiome();
+    }
+
+    private BiomeResolution resolveBiomeResolution(int x, int y, int z) {
+        if (engine == null || engine.isClosed()) {
+            return null;
+        }
+
+        if (engine.getComplex() == null) {
+            return null;
+        }
+
+        int blockX = x << 2;
+        int blockZ = z << 2;
+        int blockY = y << 2;
+        int worldMinHeight = engine.getWorld().minHeight();
+        int internalY = blockY - worldMinHeight;
+        int surfaceInternalY = engine.getComplex().getHeightStream().get(blockX, blockZ).intValue();
+        int caveSwitchInternalY = Math.max(-8 - worldMinHeight, 40);
+        boolean deepUnderground = internalY <= caveSwitchInternalY;
+        boolean belowSurface = internalY <= surfaceInternalY - 8;
+        boolean underground = deepUnderground && belowSurface;
+        IrisBiome irisBiome = underground
+                ? engine.getCaveBiome(blockX, internalY, blockZ)
+                : engine.getComplex().getTrueBiomeStream().get(blockX, blockZ);
+        if (irisBiome == null && underground) {
+            irisBiome = engine.getComplex().getTrueBiomeStream().get(blockX, blockZ);
+        }
+        if (irisBiome == null) {
+            return null;
+        }
+
+        RNG noiseRng = new RNG(seed
+                ^ (((long) blockX) * 341873128712L)
+                ^ (((long) blockY) * 132897987541L)
+                ^ (((long) blockZ) * 42317861L));
+
+        return new BiomeResolution(irisBiome, underground, blockX, blockY, blockZ, noiseRng);
+    }
+
+    private Holder<Biome> getFallbackBiome() {
+        if (fallbackBiome != null) {
+            return fallbackBiome;
+        }
+
+        Holder<Biome> holder = resolveFallbackBiome(biomeRegistry, biomeCustomRegistry);
+        if (holder != null) {
+            return holder;
+        }
+
+        throw new IllegalStateException("Unable to resolve any biome holder fallback for Iris biome source");
+    }
+
+    private static long packNoiseKey(int x, int y, int z) {
+        return (((long) x & 67108863L) << 38)
+                | (((long) z & 67108863L) << 12)
+                | ((long) y & 4095L);
+    }
+
+    private static Holder<Biome> resolveCustomBiomeHolder(Registry<Biome> customRegistry, Engine engine, String customBiomeId) {
+        if (customRegistry == null || engine == null || customBiomeId == null || customBiomeId.isBlank()) {
+            return null;
+        }
+
+        Identifier resourceLocation = Identifier.fromNamespaceAndPath(
+                engine.getDimension().getLoadKey().toLowerCase(java.util.Locale.ROOT),
+                customBiomeId.toLowerCase(java.util.Locale.ROOT)
+        );
+        Biome biome = customRegistry.getValue(resourceLocation);
+        if (biome == null) {
+            return null;
+        }
+
+        Optional<ResourceKey<Biome>> optionalBiomeKey = customRegistry.getResourceKey(biome);
+        if (optionalBiomeKey.isEmpty()) {
+            return null;
+        }
+
+        Optional<Holder.Reference<Biome>> optionalReferenceHolder = customRegistry.get(optionalBiomeKey.get());
+        if (optionalReferenceHolder.isEmpty()) {
+            return null;
+        }
+
+        return optionalReferenceHolder.get();
+    }
+
+    private static Holder<Biome> resolveFallbackBiome(Registry<Biome> registry, Registry<Biome> customRegistry) {
+        Holder<Biome> plains = NMSBinding.biomeToBiomeBase(registry, org.bukkit.block.Biome.PLAINS);
+        if (plains != null) {
+            return plains;
+        }
+
+        Holder<Biome> vanilla = firstHolder(registry);
+        if (vanilla != null) {
+            return vanilla;
+        }
+
+        return firstHolder(customRegistry);
+    }
+
+    private static Holder<Biome> firstHolder(Registry<Biome> registry) {
+        if (registry == null) {
+            return null;
+        }
+
+        for (Biome biome : registry) {
+            Optional<ResourceKey<Biome>> optionalBiomeKey = registry.getResourceKey(biome);
+            if (optionalBiomeKey.isEmpty()) {
+                continue;
+            }
+
+            Optional<Holder.Reference<Biome>> optionalHolder = registry.get(optionalBiomeKey.get());
+            if (optionalHolder.isPresent()) {
+                return optionalHolder.get();
+            }
+        }
+
+        return null;
+    }
+
+    private static final class BiomeResolution {
+        private final IrisBiome irisBiome;
+        private final boolean underground;
+        private final int blockX;
+        private final int blockY;
+        private final int blockZ;
+        private final RNG rng;
+
+        private BiomeResolution(IrisBiome irisBiome, boolean underground, int blockX, int blockY, int blockZ, RNG rng) {
+            this.irisBiome = irisBiome;
+            this.underground = underground;
+            this.blockX = blockX;
+            this.blockY = blockY;
+            this.blockZ = blockZ;
+            this.rng = rng;
+        }
+    }
+}

adapters/bukkit/nms/v26_2_R1/src/main/java/art/arcane/iris/core/nms/v26_2_R1/IrisChunkGenerator.java

@@ -0,0 +1,478 @@
+package art.arcane.iris.core.nms.v26_2_R1;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Holder;
+import net.minecraft.core.HolderLookup;
+import net.minecraft.core.HolderSet;
+import net.minecraft.core.Registry;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.SectionPos;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.LevelHeightAccessor;
+import net.minecraft.world.level.NoiseColumn;
+import net.minecraft.world.level.StructureManager;
+import net.minecraft.world.level.WorldGenLevel;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.BiomeManager;
+import net.minecraft.world.level.biome.BiomeSource;
+import net.minecraft.world.level.biome.MobSpawnSettings;
+import net.minecraft.world.level.levelgen.GenerationStep;
+import net.minecraft.world.level.levelgen.Heightmap;
+import net.minecraft.world.level.levelgen.RandomState;
+import net.minecraft.world.level.levelgen.RandomSupport;
+import net.minecraft.world.level.levelgen.WorldgenRandom;
+import net.minecraft.world.level.levelgen.XoroshiroRandomSource;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import com.mojang.datafixers.util.Pair;
+import com.mojang.serialization.MapCodec;
+import art.arcane.iris.spi.IrisLogging;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IrisImportedStructureControl;
+import art.arcane.iris.util.common.reflect.WrappedField;
+import art.arcane.iris.util.common.reflect.WrappedReturningMethod;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.util.random.Weighted;
+import net.minecraft.util.random.WeightedList;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.MobCategory;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkGenerator;
+import net.minecraft.world.level.chunk.ChunkGeneratorStructureState;
+import net.minecraft.world.level.chunk.status.ChunkStatus;
+import net.minecraft.world.level.levelgen.blending.Blender;
+import net.minecraft.world.level.levelgen.structure.Structure;
+import net.minecraft.world.level.levelgen.structure.StructureSet;
+import net.minecraft.world.level.levelgen.structure.StructureStart;
+import net.minecraft.world.level.levelgen.structure.BoundingBox;
+import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplateManager;
+import net.minecraft.core.registries.Registries;
+import java.util.stream.Collectors;
+import art.arcane.iris.engine.framework.IrisStructureLocator;
+import org.bukkit.World;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.generator.CustomChunkGenerator;
+import org.spigotmc.SpigotWorldConfig;
+
+import javax.annotation.Nullable;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class IrisChunkGenerator extends CustomChunkGenerator {
+    private static final WrappedField<ChunkGenerator, BiomeSource> BIOME_SOURCE;
+    private static final WrappedReturningMethod<Heightmap, Object> SET_HEIGHT;
+    private final ChunkGenerator delegate;
+    private final Engine engine;
+    private final CustomBiomeSource customBiomeSource;
+    private final ConcurrentHashMap<SpawnTableKey, WeightedList<MobSpawnSettings.SpawnerData>> mergedSpawnTables = new ConcurrentHashMap<>();
+    private volatile Set<String> reachableStructureKeysCache;
+
+    public IrisChunkGenerator(ChunkGenerator delegate, long seed, Engine engine, World world) {
+        this(delegate, engine, world, new CustomBiomeSource(seed, engine, world));
+    }
+
+    private IrisChunkGenerator(ChunkGenerator delegate, Engine engine, World world, CustomBiomeSource customBiomeSource) {
+        super(((CraftWorld) world).getHandle(), edit(delegate, customBiomeSource), world.getGenerator());
+        this.delegate = delegate;
+        this.engine = engine;
+        this.customBiomeSource = customBiomeSource;
+    }
+
+    @Override
+    public @Nullable Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel level, HolderSet<Structure> holders, BlockPos pos, int radius, boolean findUnexplored) {
+        try {
+            Registry<Structure> registry = level.registryAccess().lookupOrThrow(Registries.STRUCTURE);
+            BlockPos best = null;
+            Holder<Structure> bestHolder = null;
+            long bestDist = Long.MAX_VALUE;
+            for (Holder<Structure> holder : holders) {
+                Object id = registry.getKey(holder.value());
+                if (id == null) {
+                    continue;
+                }
+                int[] at = IrisStructureLocator.locate(engine, id.toString(), pos.getX(), pos.getZ(), Math.max(1, radius));
+                if (at == null) {
+                    continue;
+                }
+                long dx = (long) at[0] - pos.getX();
+                long dz = (long) at[2] - pos.getZ();
+                long d = dx * dx + dz * dz;
+                if (d < bestDist) {
+                    bestDist = d;
+                    best = new BlockPos(at[0], at[1], at[2]);
+                    bestHolder = holder;
+                }
+            }
+            if (best != null) {
+                return Pair.of(best, bestHolder);
+            }
+        } catch (Throwable e) {
+            IrisLogging.reportError(e);
+        }
+        if (!importedControl().active()) {
+            return null;
+        }
+        HolderSet<Structure> reachable = filterReachableStructures(level, holders);
+        if (reachable == null || reachable.size() == 0) {
+            return null;
+        }
+        try {
+            return delegate.findNearestMapStructure(level, reachable, pos, radius, findUnexplored);
+        } catch (Throwable e) {
+            IrisLogging.error("Vanilla structure locate failed near " + pos.getX() + ", " + pos.getZ() + ": " + e);
+            IrisLogging.reportError(e);
+            return null;
+        }
+    }
+
+    private HolderSet<Structure> filterReachableStructures(ServerLevel level, HolderSet<Structure> holders) {
+        Set<String> reachable = reachableStructureKeysCache;
+        if (reachable == null) {
+            reachable = VanillaStructureBiomes.reachableStructureKeys(level, delegate.getBiomeSource());
+            reachableStructureKeysCache = reachable;
+        }
+        if (reachable.isEmpty()) {
+            return holders;
+        }
+        Registry<Structure> registry = level.registryAccess().lookupOrThrow(Registries.STRUCTURE);
+        List<Holder<Structure>> kept = new ArrayList<>();
+        for (Holder<Structure> holder : holders) {
+            Object id = registry.getKey(holder.value());
+            if (id != null && reachable.contains(id.toString())) {
+                kept.add(holder);
+            }
+        }
+        if (kept.size() == holders.size()) {
+            return holders;
+        }
+        return HolderSet.direct(kept);
+    }
+
+    @Override
+    protected MapCodec<? extends ChunkGenerator> codec() {
+        return MapCodec.unit(null);
+    }
+
+    @Override
+    public ChunkGenerator getDelegate() {
+        if (delegate instanceof CustomChunkGenerator chunkGenerator)
+            return chunkGenerator.getDelegate();
+        return delegate;
+    }
+
+    @Override
+    public int getMinY() {
+        return delegate.getMinY();
+    }
+
+    @Override
+    public int getSeaLevel() {
+        return delegate.getSeaLevel();
+    }
+
+    @Override
+    public void createStructures(RegistryAccess registryAccess, ChunkGeneratorStructureState structureState, StructureManager structureManager, ChunkAccess access, StructureTemplateManager templateManager, ResourceKey<Level> levelKey) {
+        if (!importedControl().active()) {
+            return;
+        }
+        super.createStructures(registryAccess, structureState, structureManager, access, templateManager, levelKey);
+    }
+
+    private IrisImportedStructureControl importedControl() {
+        return engine.getDimension().getImportedStructures();
+    }
+
+    @Override
+    public ChunkGeneratorStructureState createState(HolderLookup<StructureSet> holderlookup, RandomState randomstate, long i, SpigotWorldConfig conf) {
+        return delegate.createState(holderlookup, randomstate, i, conf);
+    }
+
+    @Override
+    public void createReferences(WorldGenLevel generatoraccessseed, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        delegate.createReferences(generatoraccessseed, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public CompletableFuture<ChunkAccess> createBiomes(RandomState randomstate, Blender blender, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        ichunkaccess.fillBiomesFromNoise(customBiomeSource::getVisibleNoiseBiome, randomstate.sampler());
+        return CompletableFuture.completedFuture(ichunkaccess);
+    }
+
+    @Override
+    public void buildSurface(WorldGenRegion regionlimitedworldaccess, StructureManager structuremanager, RandomState randomstate, ChunkAccess ichunkaccess) {
+        delegate.buildSurface(regionlimitedworldaccess, structuremanager, randomstate, ichunkaccess);
+    }
+
+    @Override
+    public void applyCarvers(WorldGenRegion regionlimitedworldaccess, long seed, RandomState randomstate, BiomeManager biomemanager, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        delegate.applyCarvers(regionlimitedworldaccess, seed, randomstate, biomemanager, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public CompletableFuture<ChunkAccess> fillFromNoise(Blender blender, RandomState randomstate, StructureManager structuremanager, ChunkAccess ichunkaccess) {
+        return delegate.fillFromNoise(blender, randomstate, structuremanager, ichunkaccess);
+    }
+
+    @Override
+    public WeightedList<MobSpawnSettings.SpawnerData> getMobsAt(Holder<Biome> holder, StructureManager structuremanager, MobCategory enumcreaturetype, BlockPos blockposition) {
+        Holder<Biome> vanillaSpawnBiome = customBiomeSource.getVanillaSpawnBiome(holder);
+        if (vanillaSpawnBiome == null) {
+            return delegate.getMobsAt(holder, structuremanager, enumcreaturetype, blockposition);
+        }
+
+        WeightedList<MobSpawnSettings.SpawnerData> vanillaSpawns = vanillaSpawnBiome.value().getMobSettings().getMobs(enumcreaturetype);
+        WeightedList<MobSpawnSettings.SpawnerData> resolvedSpawns = delegate.getMobsAt(
+                vanillaSpawnBiome, structuremanager, enumcreaturetype, blockposition);
+        if (resolvedSpawns != vanillaSpawns) {
+            return resolvedSpawns;
+        }
+
+        WeightedList<MobSpawnSettings.SpawnerData> explicitSpawns = holder.value().getMobSettings().getMobs(enumcreaturetype);
+        if (explicitSpawns.isEmpty()) {
+            return vanillaSpawns;
+        }
+        if (vanillaSpawns.isEmpty()) {
+            return explicitSpawns;
+        }
+
+        SpawnTableKey key = new SpawnTableKey(holder.value(), enumcreaturetype);
+        return mergedSpawnTables.computeIfAbsent(key, ignored -> mergeSpawnTables(vanillaSpawns, explicitSpawns));
+    }
+
+    @Override
+    public void applyBiomeDecoration(WorldGenLevel generatoraccessseed, ChunkAccess ichunkaccess, StructureManager structuremanager) {
+        applyBiomeDecoration(generatoraccessseed, ichunkaccess, structuremanager, true);
+    }
+
+    @Override
+    public void addDebugScreenInfo(List<String> list, RandomState randomstate, BlockPos blockposition) {
+        delegate.addDebugScreenInfo(list, randomstate, blockposition);
+    }
+
+    @Override
+    public void applyBiomeDecoration(WorldGenLevel generatoraccessseed, ChunkAccess ichunkaccess, StructureManager structuremanager, boolean vanilla) {
+        addVanillaDecorations(generatoraccessseed, ichunkaccess, structuremanager);
+        if (importedControl().active()) {
+            placeVanillaStructures(generatoraccessseed, ichunkaccess, structuremanager);
+        }
+        delegate.applyBiomeDecoration(generatoraccessseed, ichunkaccess, structuremanager, false);
+    }
+
+    private void placeVanillaStructures(WorldGenLevel world, ChunkAccess chunk, StructureManager structureManager) {
+        if (!structureManager.shouldGenerateStructures()) {
+            return;
+        }
+        ChunkPos chunkPos = chunk.getPos();
+        SectionPos sectionPos = SectionPos.of(chunkPos, world.getMinSectionY());
+        BlockPos origin = sectionPos.origin();
+        Registry<Structure> registry = world.registryAccess().lookupOrThrow(Registries.STRUCTURE);
+        Map<Integer, List<Structure>> byStep = registry.stream().collect(Collectors.groupingBy(s -> s.step().ordinal()));
+        WorldgenRandom random = new WorldgenRandom(new XoroshiroRandomSource(RandomSupport.generateUniqueSeed()));
+        long decoSeed = random.setDecorationSeed(world.getSeed(), origin.getX(), origin.getZ());
+        BoundingBox area = writableArea(chunk);
+        int steps = GenerationStep.Decoration.values().length;
+        IrisImportedStructureControl control = importedControl();
+        for (int step = 0; step < steps; step++) {
+            int index = 0;
+            for (Structure structure : byStep.getOrDefault(step, List.of())) {
+                Object id = registry.getKey(structure);
+                String structureId = id == null ? null : id.toString();
+                if (control.shouldGenerate(structureId) && !IrisStructureLocator.suppressesVanilla(engine, structureId)) {
+                    random.setFeatureSeed(decoSeed, index, step);
+                    int[] offset = control.resolveOffset(structureId, isUndergroundStep(structure.step()));
+                    boolean shifted = offset[0] != 0 || offset[1] != 0 || offset[2] != 0;
+                    WorldGenLevel target = shifted ? shiftedLevel(world, offset[0], offset[1], offset[2]) : world;
+                    BoundingBox placeArea = shifted
+                            ? new BoundingBox(area.minX() - offset[0], area.minY(), area.minZ() - offset[2], area.maxX() - offset[0], area.maxY(), area.maxZ() - offset[2])
+                            : area;
+                    try {
+                        structureManager.startsForStructure(sectionPos, structure)
+                                .forEach(start -> start.placeInChunk(target, structureManager, this, random, placeArea, chunkPos));
+                    } catch (Throwable e) {
+                        IrisLogging.reportError(e);
+                    }
+                }
+                index++;
+            }
+        }
+    }
+
+    private static boolean isUndergroundStep(GenerationStep.Decoration step) {
+        return step == GenerationStep.Decoration.UNDERGROUND_STRUCTURES
+                || step == GenerationStep.Decoration.STRONGHOLDS;
+    }
+
+    private WorldGenLevel shiftedLevel(WorldGenLevel world, int dx, int dy, int dz) {
+        return (WorldGenLevel) Proxy.newProxyInstance(
+                WorldGenLevel.class.getClassLoader(),
+                new Class<?>[]{WorldGenLevel.class},
+                (proxy, method, args) -> {
+                    if (args != null) {
+                        for (int i = 0; i < args.length; i++) {
+                            if (args[i] instanceof BlockPos bp) {
+                                args[i] = new BlockPos(bp.getX() + dx, bp.getY() + dy, bp.getZ() + dz);
+                            }
+                        }
+                    }
+                    try {
+                        return method.invoke(world, args);
+                    } catch (InvocationTargetException e) {
+                        throw e.getCause();
+                    }
+                });
+    }
+
+    private BoundingBox writableArea(ChunkAccess chunk) {
+        ChunkPos cp = chunk.getPos();
+        int i = cp.getMinBlockX();
+        int j = cp.getMinBlockZ();
+        int minY = getMinY() + 1;
+        int maxY = getMinY() + engine.getHeight() - 1;
+        return new BoundingBox(i, minY, j, i + 15, maxY, j + 15);
+    }
+
+    @Override
+    public void addVanillaDecorations(WorldGenLevel level, ChunkAccess chunkAccess, StructureManager structureManager) {
+        SectionPos sectionPos = SectionPos.of(chunkAccess.getPos(), level.getMinSectionY());
+        BlockPos blockPos = sectionPos.origin();
+
+        Heightmap surface = chunkAccess.getOrCreateHeightmapUnprimed(Heightmap.Types.WORLD_SURFACE_WG);
+        Heightmap ocean = chunkAccess.getOrCreateHeightmapUnprimed(Heightmap.Types.OCEAN_FLOOR_WG);
+        Heightmap motion = chunkAccess.getOrCreateHeightmapUnprimed(Heightmap.Types.MOTION_BLOCKING);
+        Heightmap motionNoLeaves = chunkAccess.getOrCreateHeightmapUnprimed(Heightmap.Types.MOTION_BLOCKING_NO_LEAVES);
+
+        for (int x = 0; x < 16; x++) {
+            for (int z = 0; z < 16; z++) {
+                int wX = x + blockPos.getX();
+                int wZ = z + blockPos.getZ();
+
+                int terrainTop = engine.getHeight(wX, wZ, false) + engine.getMinHeight() + 1;
+                int terrainNoFluid = engine.getHeight(wX, wZ, true) + engine.getMinHeight() + 1;
+                SET_HEIGHT.invoke(ocean, x, z, terrainNoFluid);
+                SET_HEIGHT.invoke(surface, x, z, terrainTop);
+                SET_HEIGHT.invoke(motion, x, z, terrainTop);
+                SET_HEIGHT.invoke(motionNoLeaves, x, z, terrainTop);
+            }
+        }
+
+        Heightmap.primeHeightmaps(chunkAccess, ChunkStatus.FINAL_HEIGHTMAPS);
+    }
+
+    @Override
+    public void spawnOriginalMobs(WorldGenRegion regionlimitedworldaccess) {
+        delegate.spawnOriginalMobs(regionlimitedworldaccess);
+    }
+
+    private static WeightedList<MobSpawnSettings.SpawnerData> mergeSpawnTables(
+            WeightedList<MobSpawnSettings.SpawnerData> vanillaSpawns,
+            WeightedList<MobSpawnSettings.SpawnerData> explicitSpawns) {
+        List<Weighted<MobSpawnSettings.SpawnerData>> entries = new ArrayList<>(
+                vanillaSpawns.unwrap().size() + explicitSpawns.unwrap().size());
+        Set<EntityType<?>> explicitTypes = new HashSet<>();
+        for (Weighted<MobSpawnSettings.SpawnerData> entry : explicitSpawns.unwrap()) {
+            explicitTypes.add(entry.value().type());
+        }
+        for (Weighted<MobSpawnSettings.SpawnerData> entry : vanillaSpawns.unwrap()) {
+            if (!explicitTypes.contains(entry.value().type())) {
+                entries.add(entry);
+            }
+        }
+        entries.addAll(explicitSpawns.unwrap());
+        return WeightedList.of(entries);
+    }
+
+    @Override
+    public int getSpawnHeight(LevelHeightAccessor levelheightaccessor) {
+        return delegate.getSpawnHeight(levelheightaccessor);
+    }
+
+    @Override
+    public int getGenDepth() {
+        return delegate.getGenDepth();
+    }
+
+    @Override
+    public int getBaseHeight(int i, int j, Heightmap.Types heightmap_type, LevelHeightAccessor levelheightaccessor, RandomState randomstate) {
+        return levelheightaccessor.getMinY() + engine.getHeight(i, j, !heightmap_type.isOpaque().test(Blocks.WATER.defaultBlockState())) + 1;
+    }
+
+    @Override
+    public NoiseColumn getBaseColumn(int i, int j, LevelHeightAccessor levelheightaccessor, RandomState randomstate) {
+        int block = engine.getHeight(i, j, true);
+        int water = engine.getHeight(i, j, false);
+        BlockState[] column = new BlockState[levelheightaccessor.getHeight()];
+        for (int k = 0; k < column.length; k++) {
+            if (k <= block) column[k] = Blocks.STONE.defaultBlockState();
+            else if (k <= water) column[k] = Blocks.WATER.defaultBlockState();
+            else column[k] = Blocks.AIR.defaultBlockState();
+        }
+        return new NoiseColumn(levelheightaccessor.getMinY(), column);
+    }
+
+    @Override
+    public Optional<Identifier> getTypeNameForDataFixer() {
+        return delegate.getTypeNameForDataFixer();
+    }
+
+    @Override
+    public void validate() {
+        delegate.validate();
+    }
+
+    static {
+        Field biomeSource = null;
+        for (Field field : ChunkGenerator.class.getDeclaredFields()) {
+            if (!field.getType().equals(BiomeSource.class))
+                continue;
+            biomeSource = field;
+            break;
+        }
+        if (biomeSource == null)
+            throw new RuntimeException("Could not find biomeSource field in ChunkGenerator!");
+
+        Method setHeight = null;
+        for (Method method : Heightmap.class.getDeclaredMethods()) {
+            var types = method.getParameterTypes();
+            if (types.length != 3 || !Arrays.equals(types, new Class<?>[]{int.class, int.class, int.class})
+                    || !method.getReturnType().equals(void.class))
+                continue;
+            setHeight = method;
+            break;
+        }
+        if (setHeight == null)
+            throw new RuntimeException("Could not find setHeight method in Heightmap!");
+
+        BIOME_SOURCE = new WrappedField<>(ChunkGenerator.class, biomeSource.getName());
+        SET_HEIGHT = new WrappedReturningMethod<>(Heightmap.class, setHeight.getName(), setHeight.getParameterTypes());
+    }
+
+    private static ChunkGenerator edit(ChunkGenerator generator, BiomeSource source) {
+        try {
+            BIOME_SOURCE.set(generator, source);
+            if (generator instanceof CustomChunkGenerator custom)
+                BIOME_SOURCE.set(custom.getDelegate(), source);
+
+            return generator;
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private record SpawnTableKey(Biome biome, MobCategory category) {
+    }
+}

adapters/bukkit/nms/v26_2_R1/src/main/java/art/arcane/iris/core/nms/v26_2_R1/VanillaStructureBiomes.java

@@ -0,0 +1,77 @@
+package art.arcane.iris.core.nms.v26_2_R1;
+
+import net.minecraft.core.Holder;
+import net.minecraft.core.Registry;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.BiomeSource;
+import net.minecraft.world.level.levelgen.structure.Structure;
+
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+
+final class VanillaStructureBiomes {
+    private VanillaStructureBiomes() {
+    }
+
+    static Set<String> possibleBiomeKeys(BiomeSource source) {
+        Set<String> keys = new LinkedHashSet<>();
+        if (source == null) {
+            return keys;
+        }
+        for (Holder<Biome> holder : source.possibleBiomes()) {
+            Optional<ResourceKey<Biome>> key = holder.unwrapKey();
+            if (key.isPresent()) {
+                keys.add(key.get().identifier().toString());
+            }
+        }
+        return keys;
+    }
+
+    static Set<String> structureBiomeKeys(RegistryAccess access, String structureKey) {
+        Set<String> keys = new LinkedHashSet<>();
+        if (access == null || structureKey == null || structureKey.isEmpty()) {
+            return keys;
+        }
+        Registry<Structure> registry = access.lookupOrThrow(Registries.STRUCTURE);
+        Structure structure = registry.getValue(Identifier.parse(structureKey));
+        if (structure == null) {
+            return keys;
+        }
+        for (Holder<Biome> holder : structure.biomes()) {
+            Optional<ResourceKey<Biome>> key = holder.unwrapKey();
+            if (key.isPresent()) {
+                keys.add(key.get().identifier().toString());
+            }
+        }
+        return keys;
+    }
+
+    static Set<String> reachableStructureKeys(ServerLevel level, BiomeSource source) {
+        Set<String> reachable = new LinkedHashSet<>();
+        if (level == null || source == null) {
+            return reachable;
+        }
+        Set<String> possible = possibleBiomeKeys(source);
+        if (possible.isEmpty()) {
+            return reachable;
+        }
+        Registry<Structure> registry = level.registryAccess().lookupOrThrow(Registries.STRUCTURE);
+        for (Map.Entry<ResourceKey<Structure>, Structure> entry : registry.entrySet()) {
+            for (Holder<Biome> holder : entry.getValue().biomes()) {
+                Optional<ResourceKey<Biome>> key = holder.unwrapKey();
+                if (key.isPresent() && possible.contains(key.get().identifier().toString())) {
+                    reachable.add(entry.getKey().identifier().toString());
+                    break;
+                }
+            }
+        }
+        return reachable;
+    }
+}

adapters/bukkit/plugin/build.gradle

@@ -0,0 +1,43 @@
+String apiVersion = providers.gradleProperty('minecraftVersion').get()
+def mainClass = 'art.arcane.iris.Iris'
+def bootstrapperClass = 'art.arcane.iris.IrisBootstrap'
+
+String volmLibCoordinate = providers.gradleProperty('volmLibCoordinate')
+    .orElse('com.github.VolmitSoftware:VolmLib:cdf7e8bb880199734dacd386a6616bda799fcde1')
+    .get()
+
+dependencies {
+    compileOnly(project(':core'))
+    compileOnly(volmLibCoordinate) {
+        transitive = false
+    }
+    compileOnly(libs.paper.api)
+    testImplementation('junit:junit:4.13.2')
+    testImplementation(libs.paper.api)
+    testImplementation(libs.bstats)
+    testImplementation(libs.sentry)
+    testImplementation(project(':core'))
+    testImplementation(volmLibCoordinate) {
+        transitive = false
+    }
+    compileOnly(libs.placeholderApi)
+    compileOnly(libs.multiverseCore)
+}
+
+tasks.named('processResources').configure {
+    def pluginProperties = [
+        name      : rootProject.name,
+        version   : rootProject.version,
+        apiVersion: apiVersion,
+        main      : mainClass,
+        bootstrapper: bootstrapperClass,
+    ]
+    inputs.properties(pluginProperties)
+    filesMatching(['**/paper-plugin.yml', '**/plugin.yml']) {
+        expand(pluginProperties)
+    }
+}
+
+tasks.named('jar', Jar).configure {
+    archiveBaseName.set('iris-bukkit-plugin')
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/IrisBootstrap.java

@@ -0,0 +1,57 @@
+package art.arcane.iris;
+
+import art.arcane.iris.core.pack.DefaultPackBootstrapProvisioner;
+import art.arcane.iris.core.pack.DefaultPackBootstrapProvisioner.ProvisionResult;
+import io.papermc.paper.datapack.Datapack;
+import io.papermc.paper.datapack.DatapackRegistrar;
+import io.papermc.paper.datapack.DiscoveredDatapack;
+import io.papermc.paper.plugin.bootstrap.BootstrapContext;
+import io.papermc.paper.plugin.bootstrap.PluginBootstrap;
+import io.papermc.paper.plugin.lifecycle.event.types.LifecycleEvents;
+
+import java.io.IOException;
+import java.nio.file.Path;
+
+@SuppressWarnings("UnstableApiUsage")
+public final class IrisBootstrap implements PluginBootstrap {
+    static final String PACK_ID = "generated";
+
+    @Override
+    public void bootstrap(BootstrapContext context) {
+        ProvisionResult provisioned = provision(context);
+        Path datapackRoot = provisioned.datapackRoot();
+        context.getLogger().info("Iris startup datapack is {} at {}", provisioned.status(), datapackRoot);
+        context.getLifecycleManager().registerEventHandler(LifecycleEvents.DATAPACK_DISCOVERY, event -> {
+            try {
+                discoverPack(event.registrar(), datapackRoot);
+            } catch (IOException e) {
+                throw new IllegalStateException("Unable to discover the Iris startup datapack at " + datapackRoot, e);
+            }
+        });
+    }
+
+    static DiscoveredDatapack discoverPack(DatapackRegistrar registrar, Path datapackRoot) throws IOException {
+        DiscoveredDatapack datapack = registrar.discoverPack(
+                datapackRoot,
+                PACK_ID,
+                configurer -> configurer
+                        .autoEnableOnServerStart(true)
+                        .position(true, Datapack.Position.TOP)
+        );
+        if (datapack == null) {
+            throw new IllegalStateException("Paper did not accept the Iris startup datapack at " + datapackRoot);
+        }
+        return datapack;
+    }
+
+    private static ProvisionResult provision(BootstrapContext context) {
+        try {
+            return DefaultPackBootstrapProvisioner.provision(
+                    context.getDataDirectory(),
+                    message -> context.getLogger().info(message)
+            );
+        } catch (IOException e) {
+            throw new IllegalStateException("Unable to provision the Iris startup datapack", e);
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandDatapack.java

@@ -0,0 +1,72 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.core.datapack.DatapackIngestService;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+
+import java.util.List;
+
+@Director(name = "datapack", aliases = {"datapacks", "dp"}, description = "Download & manage external datapack imports (Modrinth)")
+public class CommandDatapack implements DirectorExecutor {
+    @Director(description = "Download/update every datapack listed in a pack dimension's 'datapackImports' and install it into the world so its structures register like vanilla", aliases = {"pull"})
+    public void ingest(
+            @Param(description = "Restart the server when new datapacks are installed (required for new structures to register and generate)", defaultValue = "false")
+            boolean restart
+    ) {
+        VolmitSender sender = sender();
+        sender.sendMessage(C.GRAY + "Starting datapack ingest...");
+        J.a(() -> DatapackIngestService.ingestAll(sender, restart));
+    }
+
+    @Director(description = "List configured datapack imports and their installed versions", aliases = {"ls"})
+    public void list() {
+        VolmitSender sender = sender();
+        KList<String> configured = DatapackIngestService.collectConfiguredImports();
+        List<DatapackIngestService.Entry> installed = DatapackIngestService.installed();
+
+        sender.sendMessage(C.GREEN + "Configured datapack imports: " + C.WHITE + configured.size());
+        for (String url : configured) {
+            sender.sendMessage(C.GRAY + "  - " + C.WHITE + url);
+        }
+
+        sender.sendMessage(C.GREEN + "Installed datapacks: " + C.WHITE + installed.size());
+        for (DatapackIngestService.Entry entry : installed) {
+            sender.sendMessage(C.GRAY + "  - " + C.WHITE + entry.id + C.GRAY + " " + (entry.versionNumber == null ? "?" : entry.versionNumber));
+        }
+
+        if (configured.isEmpty()) {
+            sender.sendMessage(C.YELLOW + "Add Modrinth URLs to a dimension's 'datapackImports' list, then run /iris datapack ingest.");
+        }
+    }
+
+    @Director(description = "Remove an installed datapack by id (also delete its URL from datapackImports to keep it gone)", aliases = {"rm"})
+    public void remove(
+            @Param(description = "The datapack id (folder name) shown by /iris datapack list")
+            String id
+    ) {
+        DatapackIngestService.remove(sender(), id);
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandDeveloper.java

@@ -0,0 +1,422 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import com.google.gson.JsonObject;
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.ServerConfigurator;
+import art.arcane.iris.core.nms.datapack.DataVersion;
+import art.arcane.iris.core.runtime.ChunkClearer;
+import art.arcane.iris.core.runtime.GoldenHashScanner;
+import art.arcane.iris.core.runtime.InPlaceChunkRegenerator;
+import art.arcane.iris.core.service.IrisEngineSVC;
+import art.arcane.iris.core.service.StudioSVC;
+import art.arcane.iris.core.tools.IrisPackBenchmarking;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.IrisEngineMantle;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IrisDimension;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
+import art.arcane.iris.util.project.context.IrisContext;
+import art.arcane.iris.util.project.matter.IrisMatterContext;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.format.Form;
+import art.arcane.volmlib.util.io.CountingDataInputStream;
+import art.arcane.volmlib.util.mantle.runtime.TectonicPlate;
+import art.arcane.volmlib.util.math.M;
+import art.arcane.volmlib.util.matter.Matter;
+import art.arcane.iris.util.nbt.common.mca.MCAFile;
+import art.arcane.iris.util.nbt.common.mca.MCAUtil;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.nio.file.Files;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.Map;
+import java.util.TreeMap;
+
+@Director(name = "Developer", origin = DirectorOrigin.BOTH, description = "Iris World Manager", aliases = {"dev"})
+public class CommandDeveloper implements DirectorExecutor {
+    @Director(description = "Get Loaded TectonicPlates Count", origin = DirectorOrigin.BOTH, sync = true)
+    public void EngineStatus() {
+        Iris.service(IrisEngineSVC.class)
+                .engineStatus(sender());
+    }
+
+    @Director(description = "Send a test exception to sentry")
+    public void Sentry() {
+        Engine engine = engine();
+        Exception testException = new Exception("This is a test");
+        if (engine == null) {
+            Iris.reportError(testException);
+            return;
+        }
+        try (IrisContext.Scope scope = IrisContext.open(engine, engine.getGenerationSessionId(), null)) {
+            Iris.reportError(testException);
+        }
+    }
+
+    @Director(description = "Hash generated block output of a fixed area for determinism/identity testing", origin = DirectorOrigin.BOTH)
+    public void genhash(
+            @Param(description = "The world to hash", contextual = true)
+            World world,
+            @Param(description = "Radius in chunks around the center", defaultValue = "4")
+            int radius,
+            @Param(description = "Center chunk X", defaultValue = "0")
+            int centerX,
+            @Param(description = "Center chunk Z", defaultValue = "0")
+            int centerZ) {
+        if (world == null) {
+            sender().sendMessage(C.RED + "World is null.");
+            return;
+        }
+
+        VolmitSender sender = sender();
+        sender.sendMessage(C.GREEN + "genhash started: " + ((radius * 2 + 1) * (radius * 2 + 1)) + " chunks...");
+        J.a(() -> runGenhash(sender, world, radius, centerX, centerZ));
+    }
+
+    private void runGenhash(VolmitSender sender, World world, int radius, int centerX, int centerZ) {
+        long startMs = M.ms();
+        int minY = world.getMinHeight();
+        int maxY = world.getMaxHeight();
+        long globalHash = 0L;
+        long solidBlocks = 0L;
+        Map<String, Long> histogram = new TreeMap<>();
+        JsonObject chunkHashes = new JsonObject();
+
+        for (int rx = centerX - radius; rx <= centerX + radius; rx++) {
+            for (int rz = centerZ - radius; rz <= centerZ + radius; rz++) {
+                org.bukkit.ChunkSnapshot snapshot;
+                try {
+                    org.bukkit.Chunk loaded = art.arcane.iris.platform.bukkit.BukkitPlatform.chunkAtAsync(world, rx, rz, true).get();
+                    snapshot = loaded.getChunkSnapshot(false, false, false);
+                } catch (Throwable e) {
+                    Iris.reportError(e);
+                    sender.sendMessage(C.RED + "genhash failed at chunk " + rx + "," + rz + ": " + e.getMessage());
+                    return;
+                }
+                long chunkHash = 0L;
+                for (int x = 0; x < 16; x++) {
+                    for (int z = 0; z < 16; z++) {
+                        int worldX = (rx << 4) + x;
+                        int worldZ = (rz << 4) + z;
+                        for (int y = minY; y < maxY; y++) {
+                            org.bukkit.Material material = snapshot.getBlockType(x, y, z);
+                            long positionSeed = ((long) worldX * 0x9E3779B97F4A7C15L)
+                                    ^ ((long) y * 0xC2B2AE3D27D4EB4FL)
+                                    ^ ((long) worldZ * 0x165667B19E3779F9L);
+                            long blockHash = genHashMix(positionSeed ^ ((long) (material.ordinal() + 1) * 0xD6E8FEB86659FD93L));
+                            chunkHash ^= blockHash;
+                            if (material != org.bukkit.Material.AIR
+                                    && material != org.bukkit.Material.CAVE_AIR
+                                    && material != org.bukkit.Material.VOID_AIR) {
+                                histogram.merge(material.name(), 1L, Long::sum);
+                                solidBlocks++;
+                            }
+                        }
+                    }
+                }
+                globalHash ^= chunkHash;
+                chunkHashes.addProperty(rx + "," + rz, Long.toHexString(chunkHash));
+            }
+        }
+
+        int side = radius * 2 + 1;
+        JsonObject result = new JsonObject();
+        result.addProperty("global", Long.toHexString(globalHash));
+        result.addProperty("chunks", side * side);
+        result.addProperty("solidBlocks", solidBlocks);
+        result.addProperty("minY", minY);
+        result.addProperty("maxY", maxY);
+        JsonObject hist = new JsonObject();
+        for (Map.Entry<String, Long> entry : histogram.entrySet()) {
+            hist.addProperty(entry.getKey(), entry.getValue());
+        }
+        result.add("histogram", hist);
+        result.add("chunkHashes", chunkHashes);
+
+        File out = new File(Iris.instance.getDataFolder(), "genhash.json");
+        try {
+            Files.writeString(out.toPath(), result.toString());
+        } catch (IOException e) {
+            Iris.reportError(e);
+        }
+
+        sender.sendMessage(C.GREEN + "genhash global=" + C.GOLD + Long.toHexString(globalHash)
+                + C.GREEN + " chunks=" + (side * side) + " solid=" + solidBlocks
+                + " in " + Form.duration((long) (M.ms() - startMs), 1));
+        Iris.info("genhash world=" + world.getName() + " global=" + Long.toHexString(globalHash)
+                + " chunks=" + (side * side) + " solidBlocks=" + solidBlocks + " -> " + out.getAbsolutePath());
+    }
+
+    private static long genHashMix(long z) {
+        z = (z ^ (z >>> 30)) * 0xBF58476D1CE4E5B9L;
+        z = (z ^ (z >>> 27)) * 0x94D049BB133111EBL;
+        return z ^ (z >>> 31);
+    }
+
+    @Director(description = "Update the pack of a world (UNSAFE!)", name = "update-world", aliases = "^world")
+    public void updateWorld(
+            @Param(description = "The world to update", contextual = true)
+            World world,
+            @Param(description = "The pack to install into the world", contextual = true, aliases = "dimension")
+            IrisDimension pack,
+            @Param(description = "Make sure to make a backup & read the warnings first!", defaultValue = "false", aliases = "c")
+            boolean confirm,
+            @Param(description = "Should Iris download the pack again for you", defaultValue = "false", name = "fresh-download", aliases = {"fresh", "new"})
+            boolean freshDownload
+    ) {
+        if (!confirm) {
+            sender().sendMessage(new String[]{
+                    C.RED + "You should always make a backup before using this",
+                    C.YELLOW + "Issues caused by this can be, but are not limited to:",
+                    C.YELLOW + " - Broken chunks (cut-offs) between old and new chunks (before & after the update)",
+                    C.YELLOW + " - Regenerated chunks that do not fit in with the old chunks",
+                    C.YELLOW + " - Structures not spawning again when regenerating",
+                    C.YELLOW + " - Caves not lining up",
+                    C.YELLOW + " - Terrain layers not lining up",
+                    C.RED + "Now that you are aware of the risks, and have made a back-up:",
+                    C.RED + "/iris developer update-world " + world.getName() + " " + pack.getLoadKey() + " confirm=true"
+            });
+            return;
+        }
+
+        File folder = world.getWorldFolder();
+        folder.mkdirs();
+
+        if (freshDownload) {
+            Iris.service(StudioSVC.class).downloadSearch(sender(), pack.getLoadKey(), true);
+        }
+
+        Iris.service(StudioSVC.class).installIntoWorld(sender(), pack, folder);
+    }
+
+    @Director(description = "Test")
+    public void mantle(
+            @Param(name = "plate", description = "Dump the whole tectonic plate instead of a single section", defaultValue = "false")
+            boolean plate,
+            @Param(name = "name", description = "The dump file id under plugins/Iris/dump (pv.<id>.*)", defaultValue = "21474836474")
+            String name
+    ) throws Throwable {
+        Engine activeEngine = engine();
+        if (activeEngine == null) {
+            sender().sendMessage(C.RED + "Target an Iris world before reading a mantle dump.");
+            return;
+        }
+        File base = Iris.instance.getDataFile("dump", "pv." + name + ".ttp.lz4b.bin");
+        File section = Iris.instance.getDataFile("dump", "pv." + name + ".section.bin");
+
+        try (IrisMatterContext.Scope scope = IrisMatterContext.open(activeEngine.getData())) {
+            if (plate) {
+                try (CountingDataInputStream in = CountingDataInputStream.wrap(new BufferedInputStream(new FileInputStream(base)))) {
+                    TectonicPlate.read(1088, in, true, IrisEngineMantle.createRuntimeDataAdapter(activeEngine.getData()), IrisEngineMantle.createRuntimeHooks());
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                }
+            } else {
+                Matter.read(section);
+            }
+        }
+        if (!TectonicPlate.hasError()) {
+            Iris.info("Read " + (plate ? base : section).length() + " bytes from " + (plate ? base : section).getAbsolutePath());
+        }
+    }
+
+    @Director(description = "Test")
+    public void packBenchmark(
+            @Param(description = "The pack to bench", aliases = {"pack"}, defaultValue = "overworld")
+            IrisDimension dimension,
+            @Param(description = "Radius in regions", defaultValue = "2048")
+            int radius,
+            @Param(description = "Open GUI while benchmarking", defaultValue = "false")
+            boolean gui
+    ) {
+        new IrisPackBenchmarking(dimension, radius, gui);
+    }
+
+    @Director(description = "Upgrade to another Minecraft version")
+    public void upgrade(
+            @Param(description = "The version to upgrade to", defaultValue = "latest") DataVersion version) {
+        sender().sendMessage(C.GREEN + "Upgrading to " + version.getVersion() + "...");
+        ServerConfigurator.installDataPacks(version.get(), false);
+        sender().sendMessage(C.GREEN + "Done upgrading! You can now update your server version to " + version.getVersion());
+    }
+
+    @Director(description = "test")
+    public void mca (
+            @Param(description = "The world folder to scan for .mca region files") String world) {
+        try {
+            File[] McaFiles = new File(world, "region").listFiles((dir, name) -> name.endsWith(".mca"));
+            for (File mca : McaFiles) {
+                MCAFile MCARegion = MCAUtil.read(mca);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    @Director(description = "Delete nearby chunk blocks for regen testing", name = "delete-chunk", aliases = {"dc"}, origin = DirectorOrigin.PLAYER, sync = true)
+    public void deleteChunk(
+            @Param(description = "Radius in chunks around your current chunk", defaultValue = "0")
+            int radius
+    ) {
+        if (radius < 0) {
+            sender().sendMessage(C.RED + "Radius must be 0 or greater.");
+            return;
+        }
+
+        World world = player().getWorld();
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "This is not an Iris world.");
+            return;
+        }
+
+        PlatformChunkGenerator access = IrisToolbelt.access(world);
+        if (access == null || access.getEngine() == null) {
+            sender().sendMessage(C.RED + "The engine access for this world is null.");
+            return;
+        }
+
+        int centerX = player().getLocation().getBlockX() >> 4;
+        int centerZ = player().getLocation().getBlockZ() >> 4;
+        int chunks = (radius * 2 + 1) * (radius * 2 + 1);
+
+        sender().sendMessage(C.GREEN + "Delete started: " + C.GOLD + chunks + C.GREEN
+                + " chunk(s) around " + C.GOLD + centerX + "," + centerZ + C.GREEN
+                + ". Clearing blocks to air.");
+
+        new ChunkClearer(world, access.getEngine(), sender(), centerX, centerZ, radius).start();
+    }
+
+    @Director(description = "Test", aliases = {"ip"})
+    public void network() {
+        try {
+            Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
+            for (NetworkInterface ni : Collections.list(networkInterfaces)) {
+                Iris.info("Display Name: %s", ni.getDisplayName());
+                Enumeration<InetAddress> inetAddresses = ni.getInetAddresses();
+                for (InetAddress ia : Collections.list(inetAddresses)) {
+                    Iris.info("IP: %s", ia.getHostAddress());
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    // --- Regen ---
+
+    @Director(name = "regen", aliases = {"rg"}, description = "Delete and regenerate nearby chunks in place using Iris generation", origin = DirectorOrigin.PLAYER, sync = true)
+    public void regen(
+            @Param(name = "radius", description = "The radius of nearby chunks", defaultValue = "5")
+            int radius
+    ) {
+        if (radius < 0) {
+            sender().sendMessage(C.RED + "Radius must be 0 or greater.");
+            return;
+        }
+
+        World world = player().getWorld();
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "You must be in an Iris world to use regen.");
+            return;
+        }
+
+        Engine engine = IrisToolbelt.access(world).getEngine();
+        if (engine == null) {
+            sender().sendMessage(C.RED + "The engine access for this world is null. Generate nearby chunks first.");
+            return;
+        }
+
+        int centerX = player().getLocation().getBlockX() >> 4;
+        int centerZ = player().getLocation().getBlockZ() >> 4;
+        int chunks = (radius * 2 + 1) * (radius * 2 + 1);
+
+        sender().sendMessage(C.GREEN + "Regen started: " + C.GOLD + chunks + C.GREEN
+                + " chunk(s) around " + C.GOLD + centerX + "," + centerZ + C.GREEN
+                + ". Deleting and regenerating in place.");
+        Iris.info("Regen run start: world=" + world.getName()
+                + " center=" + centerX + "," + centerZ
+                + " radius=" + radius
+                + " chunks=" + chunks);
+
+        new InPlaceChunkRegenerator(world, engine, sender(), centerX, centerZ, radius).start();
+    }
+
+    @Director(name = "goldenhash", aliases = {"gold"}, description = "Generate chunks into buffers (no world writes) and hash blocks+biomes; captures a golden file or verifies against an existing one. Resets mantle in the scanned area - use on disposable test worlds.", origin = DirectorOrigin.BOTH)
+    public void goldenhash(
+            @Param(description = "The world to scan", contextual = true)
+            World world,
+            @Param(name = "radius", description = "Radius in chunks around the center", defaultValue = "8")
+            int radius,
+            @Param(name = "center-x", description = "Center chunk X", defaultValue = "0")
+            int centerX,
+            @Param(name = "center-z", description = "Center chunk Z", defaultValue = "0")
+            int centerZ,
+            @Param(name = "reset-mantle", description = "Delete mantle data in the scan area first for full regeneration from scratch", defaultValue = "true")
+            boolean resetMantle,
+            @Param(name = "threads", description = "Concurrent chunk generations; 1 = strictly serial for order-dependence testing", defaultValue = "8")
+            int threads,
+            @Param(name = "deep", description = "Also dump full per-chunk non-air blockstates for offline diffing", defaultValue = "false")
+            boolean deep
+    ) {
+        if (radius < 0) {
+            sender().sendMessage(C.RED + "Radius must be 0 or greater.");
+            return;
+        }
+
+        if (world == null || !IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "Target must be an Iris world.");
+            return;
+        }
+
+        PlatformChunkGenerator access = IrisToolbelt.access(world);
+        if (access == null || access.getEngine() == null) {
+            sender().sendMessage(C.RED + "The engine access for this world is null.");
+            return;
+        }
+
+        int chunks = (radius * 2 + 1) * (radius * 2 + 1);
+        sender().sendMessage(C.GREEN + "GoldenHash started: " + C.GOLD + chunks + C.GREEN
+                + " chunk(s) around " + C.GOLD + centerX + "," + centerZ + C.GREEN
+                + " in buffers (world untouched).");
+        Iris.info("goldenhash start: world=" + world.getName()
+                + " center=" + centerX + "," + centerZ
+                + " radius=" + radius
+                + " chunks=" + chunks);
+
+        new GoldenHashScanner(world, access.getEngine(), sender(), centerX, centerZ, radius, resetMantle, threads, deep).start();
+    }
+
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandEdit.java

@@ -0,0 +1,119 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.service.StudioSVC;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisDimension;
+import art.arcane.iris.engine.object.IrisRegion;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.util.common.format.C;
+
+import java.awt.Desktop;
+import java.awt.GraphicsEnvironment;
+
+
+@Director(name = "edit", origin = DirectorOrigin.PLAYER, description = "Edit something")
+public class CommandEdit implements DirectorExecutor {
+    private boolean noStudio() {
+        if (!sender().isPlayer()) {
+            sender().sendMessage(C.RED + "Players only!");
+            return true;
+        }
+        if (!Iris.service(StudioSVC.class).isProjectOpen()) {
+            sender().sendMessage(C.RED + "No studio world is open!");
+            return true;
+        }
+        if (!engine().isStudio()) {
+            sender().sendMessage(C.RED + "You must be in a studio world!");
+            return true;
+        }
+
+        if (GraphicsEnvironment.isHeadless()) {
+            sender().sendMessage(C.RED + "Cannot open files in headless environments!");
+            return true;
+        }
+
+        if (!Desktop.isDesktopSupported()) {
+            sender().sendMessage(C.RED + "Desktop is not supported by this environment!");
+            return true;
+        }
+        return false;
+    }
+
+
+    @Director(description = "Edit the biome you specified", aliases = {"b"}, origin = DirectorOrigin.PLAYER)
+    public void biome(@Param(contextual = false, description = "The biome to edit") IrisBiome biome) {
+        if (noStudio()) {
+            return;
+        }
+        try {
+            if (biome == null || biome.getLoadFile() == null) {
+                sender().sendMessage(C.GOLD + "Cannot find the file; Perhaps it was not loaded directly from a file?");
+                return;
+            }
+            Desktop.getDesktop().open(biome.getLoadFile());
+            sender().sendMessage(C.GREEN + "Opening " + biome.getTypeName() + " " + biome.getLoadFile().getName().split("\\Q.\\E")[0] + " in VSCode! ");
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            sender().sendMessage(C.RED + "Cant find the file. Or registrant does not exist");
+        }
+    }
+
+    @Director(description = "Edit the region you specified", aliases = {"r"}, origin = DirectorOrigin.PLAYER)
+    public void region(@Param(contextual = false, description = "The region to edit") IrisRegion region) {
+        if (noStudio()) {
+            return;
+        }
+        try {
+            if (region == null || region.getLoadFile() == null) {
+                sender().sendMessage(C.GOLD + "Cannot find the file; Perhaps it was not loaded directly from a file?");
+                return;
+            }
+            Desktop.getDesktop().open(region.getLoadFile());
+            sender().sendMessage(C.GREEN + "Opening " + region.getTypeName() + " " + region.getLoadFile().getName().split("\\Q.\\E")[0] + " in VSCode! ");
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            sender().sendMessage(C.RED + "Cant find the file. Or registrant does not exist");
+        }
+    }
+
+    @Director(description = "Edit the dimension you specified", aliases = {"d"}, origin = DirectorOrigin.PLAYER)
+    public void dimension(@Param(contextual = false, description = "The dimension to edit") IrisDimension dimension) {
+        if (noStudio()) {
+            return;
+        }
+        try {
+            if (dimension == null || dimension.getLoadFile() == null) {
+                sender().sendMessage(C.GOLD + "Cannot find the file; Perhaps it was not loaded directly from a file?");
+                return;
+            }
+            Desktop.getDesktop().open(dimension.getLoadFile());
+            sender().sendMessage(C.GREEN + "Opening " + dimension.getTypeName() + " " + dimension.getLoadFile().getName().split("\\Q.\\E")[0] + " in VSCode! ");
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            sender().sendMessage(C.RED + "Cant find the file. Or registrant does not exist");
+        }
+    }
+
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandFind.java

@@ -0,0 +1,202 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.platform.bukkit.BukkitPlatform;
+import art.arcane.iris.core.service.ObjectStudioSaveService;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.framework.IrisStructureLocator;
+import art.arcane.iris.engine.platform.EngineBukkitOps;
+import art.arcane.iris.engine.framework.StructureReachability;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisRegion;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.iris.util.common.director.specialhandlers.ObjectHandler;
+import art.arcane.iris.util.common.director.specialhandlers.StructureHandler;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import io.papermc.paper.registry.RegistryAccess;
+import io.papermc.paper.registry.RegistryKey;
+import org.bukkit.Location;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.bukkit.entity.Player;
+import org.bukkit.generator.structure.Structure;
+import org.bukkit.util.StructureSearchResult;
+
+@Director(name = "find", origin = DirectorOrigin.PLAYER, description = "Iris Find commands", aliases = "goto")
+public class CommandFind implements DirectorExecutor {
+    @Director(description = "Find a biome")
+    public void biome(
+            @Param(description = "The biome to look for")
+            IrisBiome biome,
+            @Param(description = "Should you be teleported", defaultValue = "true")
+            boolean teleport
+    ) {
+        Engine e = engine();
+
+        if (e == null) {
+            sender().sendMessage(C.GOLD + "Not in an Iris World!");
+            return;
+        }
+
+        EngineBukkitOps.gotoBiome(e, biome, player(), teleport);
+    }
+
+    @Director(description = "Find a region")
+    public void region(
+            @Param(description = "The region to look for")
+            IrisRegion region,
+            @Param(description = "Should you be teleported", defaultValue = "true")
+            boolean teleport
+    ) {
+        Engine e = engine();
+
+        if (e == null) {
+            sender().sendMessage(C.GOLD + "Not in an Iris World!");
+            return;
+        }
+
+        EngineBukkitOps.gotoRegion(e, region, player(), teleport);
+    }
+
+    @Director(description = "Find a point of interest.")
+    public void poi(
+            @Param(description = "The type of PoI to look for.")
+            String type,
+            @Param(description = "Should you be teleported", defaultValue = "true")
+            boolean teleport
+    ) {
+        Engine e = engine();
+        if (e == null) {
+            sender().sendMessage(C.GOLD + "Not in an Iris World!");
+            return;
+        }
+
+        EngineBukkitOps.gotoPOI(e, type, player(), teleport);
+    }
+
+    @Director(description = "Find a structure (a vanilla key like minecraft:village_plains or minecraft:stronghold, or an imported iris structure key)")
+    public void structure(
+            @Param(description = "The structure to look for (e.g. minecraft:village_plains, minecraft:stronghold, minecraft_ancient_city)", customHandler = StructureHandler.class)
+            String structure
+    ) {
+        VolmitSender commandSender = sender();
+        if (commandSender == null) {
+            Iris.reportError("Structure lookup started without a command sender context.", new IllegalStateException("Missing command sender context"));
+            return;
+        }
+
+        Engine e = engine();
+
+        if (e == null) {
+            commandSender.sendMessage(C.GOLD + "Not in an Iris World!");
+            return;
+        }
+
+        if (IrisStructureLocator.isPlaced(e, structure)) {
+            EngineBukkitOps.gotoStructure(e, structure, player(), true);
+            return;
+        }
+
+        Player target = player();
+        if (target == null) {
+            commandSender.sendMessage(C.GOLD + "Run this in-game to teleport to a structure.");
+            return;
+        }
+
+        commandSender.sendMessage(C.GRAY + "Locating " + structure + "...");
+        J.s(() -> {
+            try {
+                Registry<Structure> structureRegistry = RegistryAccess.registryAccess().getRegistry(RegistryKey.STRUCTURE);
+                Structure match = null;
+                for (Structure candidate : structureRegistry) {
+                    NamespacedKey key = structureRegistry.getKey(candidate);
+                    if (key != null && key.toString().equalsIgnoreCase(structure)) {
+                        match = candidate;
+                        break;
+                    }
+                }
+                if (match == null) {
+                    commandSender.sendMessage(C.RED + "Unknown structure: " + structure);
+                    return;
+                }
+                if (!StructureReachability.isReachable(e, structure)) {
+                    KList<String> miss = StructureReachability.missingBiomeKeys(e, structure);
+                    commandSender.sendMessage(C.YELLOW + structure + " cannot generate in this world (its required biomes are not produced by this pack"
+                            + (miss.isEmpty() ? "" : ": needs " + String.join("/", miss)) + ").");
+                    return;
+                }
+                StructureSearchResult result = target.getWorld().locateNearestStructure(target.getLocation(), match, 100, true);
+                if (result == null || result.getLocation() == null) {
+                    commandSender.sendMessage(C.YELLOW + "No " + structure + " found within range of you.");
+                    return;
+                }
+                Location at = result.getLocation();
+                int y = target.getWorld().getHighestBlockYAt(at.getBlockX(), at.getBlockZ()) + 2;
+                Location dest = new Location(target.getWorld(), at.getBlockX() + 0.5, y, at.getBlockZ() + 0.5);
+                BukkitPlatform.teleportAsync(target, dest);
+                commandSender.sendMessage(C.GREEN + "Teleported to " + structure + " @ " + at.getBlockX() + ", " + at.getBlockZ());
+            } catch (Throwable t) {
+                commandSender.sendMessage(C.RED + "Could not locate " + structure + ": " + t.getClass().getSimpleName());
+                Iris.reportError("Could not locate structure '" + structure + "'.", t);
+            }
+        });
+    }
+
+    @Director(description = "Find an object")
+    public void object(
+            @Param(description = "The object to look for", customHandler = ObjectHandler.class)
+            String object,
+            @Param(description = "Should you be teleported", defaultValue = "true")
+            boolean teleport
+    ) {
+        Engine e = engine();
+
+        if (e == null) {
+            sender().sendMessage(C.GOLD + "Not in an Iris World!");
+            return;
+        }
+
+        Player studioPlayer = player();
+        if (studioPlayer != null) {
+            try {
+                if (ObjectStudioSaveService.get().teleportTo(studioPlayer, object)) {
+                    sender().sendMessage(C.GREEN + "Object Studio: teleporting to " + object);
+                    return;
+                }
+            } catch (Throwable t) {
+                Iris.reportError(t);
+            }
+        }
+
+        if (e.hasObjectPlacement(object)) {
+            EngineBukkitOps.gotoObject(e, object, player(), teleport);
+            return;
+        }
+
+        sender().sendMessage(C.RED + object + " is not configured in any region/biome object placements.");
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandIris.java

@@ -0,0 +1,642 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.platform.bukkit.BukkitPlatform;
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.iris.core.IrisWorldStorage;
+import art.arcane.iris.core.IrisWorlds;
+import art.arcane.iris.core.ServerConfigurator;
+import art.arcane.iris.core.lifecycle.WorldLifecycleService;
+import art.arcane.iris.core.loader.IrisData;
+import art.arcane.iris.core.pack.PackDownloader;
+import art.arcane.iris.core.service.StudioSVC;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IrisDimension;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.volmlib.util.bukkit.WorldIdentity;
+import art.arcane.volmlib.util.director.DirectorParameterHandler;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.volmlib.util.director.exceptions.DirectorParsingException;
+import art.arcane.iris.util.common.director.specialhandlers.NullablePlayerHandler;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.io.IO;
+import art.arcane.iris.util.common.misc.ServerProperties;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.NamespacedKey;
+import org.bukkit.World;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.entity.Player;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static art.arcane.iris.core.service.EditSVC.deletingWorld;
+import static art.arcane.iris.util.common.misc.ServerProperties.BUKKIT_YML;
+import static org.bukkit.Bukkit.getServer;
+
+@Director(name = "iris", aliases = {"ir", "irs"}, description = "Basic Command")
+public class CommandIris implements DirectorExecutor {
+    private CommandStudio studio;
+    private CommandPregen pregen;
+    private CommandObject object;
+    private CommandStructure structure;
+    private CommandWhat what;
+    private CommandEdit edit;
+    private CommandDeveloper developer;
+    private CommandPack pack;
+    private CommandFind find;
+    private CommandDatapack datapack;
+    public static boolean worldCreation = false;
+    private static final AtomicReference<Thread> mainWorld = new AtomicReference<>();
+    String WorldEngine;
+    String worldNameToCheck = "YourWorldName";
+    VolmitSender sender = Iris.getSender();
+
+    @Director(description = "Create a new world", aliases = {"c"})
+    public void create(
+            @Param(aliases = "world-name", description = "The name of the world to create")
+            String name,
+            @Param(
+                    aliases = {"dimension", "pack"},
+                    description = "The dimension/pack to create the world with",
+                    defaultValue = "default",
+                    customHandler = PackDimensionTypeHandler.class
+            )
+            String type,
+            @Param(description = "The seed to generate the world with", defaultValue = "1337")
+            long seed,
+            @Param(aliases = "main-world", description = "Whether or not to automatically use this world as the main world", defaultValue = "false")
+            boolean main
+    ) {
+        if (name.equalsIgnoreCase("iris")) {
+            sender().sendMessage(C.RED + "You cannot use the world name \"iris\" for creating worlds as Iris uses this directory for studio worlds.");
+            sender().sendMessage(C.RED + "May we suggest the name \"IrisWorld\" instead?");
+            return;
+        }
+
+        if (name.equalsIgnoreCase("benchmark")) {
+            sender().sendMessage(C.RED + "You cannot use the world name \"benchmark\" for creating worlds as Iris uses this directory for Benchmarking Packs.");
+            sender().sendMessage(C.RED + "May we suggest the name \"IrisWorld\" instead?");
+            return;
+        }
+
+        if (IrisWorldStorage.dimensionRoot(name).exists()) {
+            sender().sendMessage(C.RED + "That folder already exists!");
+            return;
+        }
+
+        String resolvedType = type.equalsIgnoreCase("default")
+                ? IrisSettings.get().getGenerator().getDefaultWorldType()
+                : type;
+
+        IrisDimension dimension = IrisToolbelt.getDimension(resolvedType);
+        if (dimension == null) {
+            sender().sendMessage(C.RED + "Could not find or download dimension \"" + resolvedType + "\".");
+            sender().sendMessage(C.YELLOW + "Try one of: overworld, vanilla, flat, theend");
+            sender().sendMessage(C.YELLOW + "Or download manually: /iris download " + resolvedType);
+            return;
+        }
+
+        if (J.isFolia()) {
+            if (stageFoliaWorldCreation(name, dimension, seed, main)) {
+                sender().sendMessage(C.GREEN + "World staging completed. Restart the server to generate/load \"" + name + "\".");
+            }
+            return;
+        }
+
+        try {
+            worldCreation = true;
+            IrisToolbelt.createWorld()
+                    .dimension(resolvedType)
+                    .name(name)
+                    .seed(seed)
+                    .sender(sender())
+                    .studio(false)
+                    .create();
+            if (main) {
+                Runtime.getRuntime().addShutdownHook(mainWorld.updateAndGet(old -> {
+                    if (old != null) Runtime.getRuntime().removeShutdownHook(old);
+                    return new Thread(() -> updateMainWorld(name));
+                }));
+            }
+        } catch (Throwable e) {
+            sender().sendMessage(C.RED + "Exception raised during creation. See the console for more details.");
+            Iris.reportError("Exception raised during world creation for \"" + name + "\".", e);
+            worldCreation = false;
+            return;
+        }
+
+        worldCreation = false;
+        sender().sendMessage(C.GREEN + "Successfully created your world!");
+        if (main) sender().sendMessage(C.GREEN + "Your world will automatically be set as the main world when the server restarts.");
+    }
+
+    private boolean updateMainWorld(String newName) {
+        try {
+            File oldLevelRoot = IrisWorldStorage.levelRoot();
+            File worldContainer = oldLevelRoot.getParentFile();
+            Properties data = ServerProperties.DATA;
+            try (FileInputStream in = new FileInputStream(ServerProperties.SERVER_PROPERTIES)) {
+                data.load(in);
+            }
+
+            File sourceDimensionRoot = IrisWorldStorage.dimensionRoot(IrisWorldStorage.keyFromLegacyName(newName));
+            if (!sourceDimensionRoot.isDirectory()) {
+                throw new IllegalStateException("Source dimension folder does not exist: " + sourceDimensionRoot.getAbsolutePath());
+            }
+
+            File newLevelRoot = new File(worldContainer, newName);
+            if (!newLevelRoot.exists() && !newLevelRoot.mkdirs()) {
+                throw new IllegalStateException("Could not create target level folder: " + newLevelRoot.getAbsolutePath());
+            }
+
+            for (String sub : List.of("data", "datapacks", "players")) {
+                File source = new File(oldLevelRoot, sub);
+                if (!source.exists()) {
+                    continue;
+                }
+
+                IO.copyDirectory(source.toPath(), new File(newLevelRoot, sub).toPath());
+            }
+
+            File targetDimensionRoot = IrisWorldStorage.dimensionRoot(newLevelRoot, NamespacedKey.minecraft("overworld"));
+            IO.copyDirectory(sourceDimensionRoot.toPath(), targetDimensionRoot.toPath());
+
+            World sourceWorld = WorldIdentity.resolve(IrisWorldStorage.keyFromLegacyName(newName)).orElse(null);
+            Long stagedSeed = IrisWorlds.readBukkitWorldSeed(newName);
+            if (sourceWorld == null && stagedSeed == null) {
+                throw new IllegalStateException("Cannot determine the promoted world's seed.");
+            }
+            long promotedSeed = sourceWorld == null ? stagedSeed : sourceWorld.getSeed();
+            data.setProperty("level-name", newName);
+            data.setProperty("level-seed", Long.toString(promotedSeed));
+            try (FileOutputStream out = new FileOutputStream(ServerProperties.SERVER_PROPERTIES)) {
+                data.store(out, null);
+            }
+            return true;
+        } catch (Throwable e) {
+            Iris.error("Failed to update server.properties main world to \"" + newName + "\"");
+            Iris.reportError(e);
+            return false;
+        }
+    }
+
+    private boolean stageFoliaWorldCreation(String name, IrisDimension dimension, long seed, boolean main) {
+        sender().sendMessage(C.YELLOW + "Runtime world creation is disabled on Folia.");
+        sender().sendMessage(C.YELLOW + "Preparing world files and bukkit.yml for next startup...");
+
+        File worldFolder = IrisWorldStorage.dimensionRoot(name);
+        IrisDimension installed = Iris.service(StudioSVC.class).installIntoWorld(sender(), dimension, worldFolder);
+        if (installed == null) {
+            sender().sendMessage(C.RED + "Failed to stage world files for dimension \"" + dimension.getLoadKey() + "\".");
+            return false;
+        }
+
+        if (!registerWorldInBukkitYml(name, dimension.getLoadKey(), seed)) {
+            return false;
+        }
+
+        if (main) {
+            if (updateMainWorld(name)) {
+                sender().sendMessage(C.GREEN + "Updated server.properties level-name to \"" + name + "\".");
+            } else {
+                sender().sendMessage(C.RED + "World was staged, but failed to update server.properties main world.");
+                return false;
+            }
+        }
+
+        sender().sendMessage(C.GREEN + "Staged Iris world \"" + name + "\" with generator Iris:" + dimension.getLoadKey() + " and seed " + seed + ".");
+        if (main) {
+            sender().sendMessage(C.GREEN + "This world is now configured as main for next restart.");
+        }
+        return true;
+    }
+
+    private boolean registerWorldInBukkitYml(String worldName, String dimension, Long seed) {
+        YamlConfiguration yml = YamlConfiguration.loadConfiguration(BUKKIT_YML);
+        ConfigurationSection worlds = yml.getConfigurationSection("worlds");
+        if (worlds == null) {
+            worlds = yml.createSection("worlds");
+        }
+        ConfigurationSection worldSection = worlds.getConfigurationSection(worldName);
+        if (worldSection == null) {
+            worldSection = worlds.createSection(worldName);
+        }
+
+        String generator = "Iris:" + dimension;
+        worldSection.set("generator", generator);
+        if (seed != null) {
+            worldSection.set("seed", seed);
+        }
+
+        try {
+            yml.save(BUKKIT_YML);
+            Iris.info("Registered \"" + worldName + "\" in bukkit.yml");
+            return true;
+        } catch (IOException e) {
+            sender().sendMessage(C.RED + "Failed to update bukkit.yml: " + e.getMessage());
+            Iris.error("Failed to update bukkit.yml!");
+            Iris.reportError(e);
+            return false;
+        }
+    }
+
+    @Director(description = "Teleport to another world", aliases = {"tp"}, sync = true)
+    public void teleport(
+            @Param(description = "World to teleport to")
+            World world,
+            @Param(description = "Player to teleport", defaultValue = "---", customHandler = NullablePlayerHandler.class)
+            Player player
+    ) {
+        if (player == null && sender().isPlayer())
+            player = sender().player();
+
+        final Player target = player;
+        if (target == null) {
+            sender().sendMessage(C.RED + "The specified player does not exist.");
+            return;
+        }
+
+        final Location spawn = world.getSpawnLocation();
+        final Runnable teleportTask = () -> {
+            BukkitPlatform.teleportAsync(target, spawn);
+            new VolmitSender(target).sendMessage(C.GREEN + "You have been teleported to " + world.getName() + ".");
+        };
+        if (!J.runEntity(target, teleportTask)) {
+            teleportTask.run();
+        }
+    }
+
+    @Director(description = "Print version information")
+    public void version() {
+        sender().sendMessage(C.GREEN + "Iris v" + Iris.instance.getDescription().getVersion() + " by Volmit Software");
+    }
+
+    /*
+    /todo
+    @Director(description = "Benchmark a pack", origin = DirectorOrigin.CONSOLE)
+    public void packbenchmark(
+            @Param(description = "Dimension to benchmark")
+            IrisDimension type
+    ) throws InterruptedException {
+
+         BenchDimension = type.getLoadKey();
+
+        IrisPackBenchmarking.runBenchmark();
+    } */
+
+    @Director(description = "Print world height information", origin = DirectorOrigin.PLAYER)
+    public void height() {
+        if (sender().isPlayer()) {
+            sender().sendMessage(C.GREEN + "" + sender().player().getWorld().getMinHeight() + " to " + sender().player().getWorld().getMaxHeight());
+            sender().sendMessage(C.GREEN + "Total Height: " + (sender().player().getWorld().getMaxHeight() - sender().player().getWorld().getMinHeight()));
+        } else {
+            World mainWorld = getServer().getWorlds().get(0);
+            Iris.info(C.GREEN + "" + mainWorld.getMinHeight() + " to " + mainWorld.getMaxHeight());
+            Iris.info(C.GREEN + "Total Height: " + (mainWorld.getMaxHeight() - mainWorld.getMinHeight()));
+        }
+    }
+
+    @Director(description = "Check access of all worlds.", aliases = {"accesslist"})
+    public void worlds() {
+        KList<World> IrisWorlds = new KList<>();
+        KList<World> BukkitWorlds = new KList<>();
+
+        for (World w : Bukkit.getServer().getWorlds()) {
+            try {
+                Engine engine = IrisToolbelt.access(w).getEngine();
+                if (engine != null) {
+                    IrisWorlds.add(w);
+                }
+            } catch (Exception e) {
+                BukkitWorlds.add(w);
+            }
+        }
+
+        if (sender().isPlayer()) {
+            sender().sendMessage(C.BLUE + "Iris Worlds: ");
+            for (World IrisWorld : IrisWorlds.copy()) {
+                sender().sendMessage(C.IRIS + "- " +IrisWorld.getName());
+            }
+            sender().sendMessage(C.GOLD + "Bukkit Worlds: ");
+            for (World BukkitWorld : BukkitWorlds.copy()) {
+                sender().sendMessage(C.GRAY + "- " +BukkitWorld.getName());
+            }
+        } else {
+            Iris.info(C.BLUE + "Iris Worlds: ");
+            for (World IrisWorld : IrisWorlds.copy()) {
+                Iris.info(C.IRIS + "- " +IrisWorld.getName());
+            }
+            Iris.info(C.GOLD + "Bukkit Worlds: ");
+            for (World BukkitWorld : BukkitWorlds.copy()) {
+                Iris.info(C.GRAY + "- " +BukkitWorld.getName());
+            }
+            
+        }
+    }
+
+    @Director(description = "Remove an Iris world", aliases = {"rm"}, sync = true)
+    public void remove(
+            @Param(description = "The world to remove")
+            World world,
+            @Param(description = "Whether to also remove the folder (if set to false, just does not load the world)", defaultValue = "true")
+            boolean delete
+    ) {
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "This is not an Iris world. Iris worlds: " + String.join(", ", getServer().getWorlds().stream().filter(IrisToolbelt::isIrisWorld).map(World::getName).toList()));
+            return;
+        }
+        sender().sendMessage(C.GREEN + "Removing world: " + world.getName());
+
+        if (!IrisToolbelt.evacuate(world)) {
+            sender().sendMessage(C.RED + "Failed to evacuate world: " + world.getName());
+            return;
+        }
+
+        if (!WorldLifecycleService.get().unload(world, false)) {
+            sender().sendMessage(C.RED + "Failed to unload world: " + world.getName());
+            return;
+        }
+
+        try {
+            if (IrisToolbelt.removeWorld(world)) {
+                sender().sendMessage(C.GREEN + "Successfully removed " + world.getName() + " from bukkit.yml");
+            } else {
+                sender().sendMessage(C.YELLOW + "Looks like the world was already removed from bukkit.yml");
+            }
+        } catch (IOException e) {
+            sender().sendMessage(C.RED + "Failed to save bukkit.yml because of " + e.getMessage());
+            Iris.reportError("Failed to remove world \"" + world.getName() + "\" from bukkit.yml.", e);
+        }
+        IrisToolbelt.evacuate(world, "Deleting world");
+        deletingWorld = true;
+        if (!delete) {
+            deletingWorld = false;
+            return;
+        }
+        VolmitSender sender = sender();
+        J.a(() -> {
+            int retries = 12;
+
+            if (deleteDirectory(world.getWorldFolder())) {
+                sender.sendMessage(C.GREEN + "Successfully removed world folder");
+            } else {
+                while(true){
+                    if (deleteDirectory(world.getWorldFolder())){
+                        sender.sendMessage(C.GREEN + "Successfully removed world folder");
+                        break;
+                    }
+                    retries--;
+                    if (retries == 0){
+                        sender.sendMessage(C.RED + "Failed to remove world folder");
+                        break;
+                    }
+                    J.sleep(3000);
+                }
+            }
+            deletingWorld = false;
+        });
+    }
+
+    public static boolean deleteDirectory(File dir) {
+        if (dir.isDirectory()) {
+            File[] children = dir.listFiles();
+            for (int i = 0; i < children.length; i++) {
+                boolean success = deleteDirectory(children[i]);
+                if (!success) {
+                    return false;
+                }
+            }
+        }
+        return dir.delete();
+    }
+
+    @Director(description = "Toggle debug")
+    public void debug() {
+        boolean to = !IrisSettings.get().getGeneral().isDebug();
+        IrisSettings.get().getGeneral().setDebug(to);
+        IrisSettings.get().forceSave();
+        sender().sendMessage(C.GREEN + "Set debug to: " + to);
+    }
+
+    @Director(description = "Download a project.", aliases = "dl")
+    public void download(
+            @Param(name = "pack", description = "The pack to download", aliases = "project")
+            String pack,
+            @Param(name = "branch", description = "The branch to download from", defaultValue = "stable")
+            String branch,
+            @Param(name = "overwrite", description = "Whether or not to overwrite the pack with the downloaded one", aliases = "force", defaultValue = "false")
+            boolean overwrite
+    ) {
+        if (PackDownloader.isDefaultOverworld(pack)) {
+            sender().sendMessage(C.GREEN + "Downloading pack: " + pack + " (beta release)" + (overwrite ? " overwriting" : ""));
+            Iris.service(StudioSVC.class).downloadDefaultOverworld(sender(), overwrite);
+        } else {
+            sender().sendMessage(C.GREEN + "Downloading pack: " + pack + "/" + branch + (overwrite ? " overwriting" : ""));
+            Iris.service(StudioSVC.class).downloadSearch(sender(), "IrisDimensions/" + pack + "/" + branch, overwrite);
+        }
+        ServerConfigurator.installDataPacksIfChanged(true);
+    }
+
+    @Director(description = "Get metrics for your world", aliases = "measure", origin = DirectorOrigin.PLAYER)
+    public void metrics() {
+        if (!IrisToolbelt.isIrisWorld(world())) {
+            sender().sendMessage(C.RED + "You must be in an Iris world");
+            return;
+        }
+        sender().sendMessage(C.GREEN + "Sending metrics...");
+        engine().printMetrics(sender());
+    }
+
+    @Director(description = "Reload configuration file (this is also done automatically)")
+    public void reload() {
+        IrisSettings.invalidate();
+        IrisSettings.get();
+        sender().sendMessage(C.GREEN + "Hotloaded settings");
+    }
+
+
+    @Director(description = "Unload an Iris World", origin = DirectorOrigin.PLAYER, sync = true)
+    public void unloadWorld(
+            @Param(description = "The world to unload")
+            World world
+    ) {
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "This is not an Iris world. Iris worlds: " + String.join(", ", getServer().getWorlds().stream().filter(IrisToolbelt::isIrisWorld).map(World::getName).toList()));
+            return;
+        }
+        sender().sendMessage(C.GREEN + "Unloading world: " + world.getName());
+        try {
+            IrisToolbelt.evacuate(world);
+            boolean unloaded = WorldLifecycleService.get().unload(world, false);
+            if (unloaded) {
+                sender().sendMessage(C.GREEN + "World unloaded successfully.");
+            } else {
+                sender().sendMessage(C.RED + "Failed to unload the world.");
+            }
+        } catch (Exception e) {
+            sender().sendMessage(C.RED + "Failed to unload the world: " + e.getMessage());
+            Iris.reportError("Failed to unload world \"" + world.getName() + "\".", e);
+        }
+    }
+
+    @Director(description = "Load an Iris World", origin = DirectorOrigin.PLAYER, sync = true, aliases = {"import"})
+    public void loadWorld(
+            @Param(description = "The name of the world to load")
+            String world
+    ) {
+        worldNameToCheck = world;
+        boolean worldExists = doesWorldExist(worldNameToCheck);
+        WorldEngine = world;
+
+        if (!worldExists) {
+            sender().sendMessage(C.YELLOW + world + " Doesnt exist on the server.");
+            return;
+        }
+
+        File directory = new File(IrisWorldStorage.packRoot(IrisWorldStorage.keyFromLegacyName(world)), "dimensions");
+
+        String dimension = null;
+        if (directory.exists() && directory.isDirectory()) {
+            File[] files = directory.listFiles();
+            if (files != null) {
+                for (File file : files) {
+                    if (file.isFile()) {
+                        String fileName = file.getName();
+                        if (fileName.endsWith(".json")) {
+                            dimension = fileName.substring(0, fileName.length() - 5);
+                            sender().sendMessage(C.BLUE + "Generator: " + dimension);
+                        }
+                    }
+                }
+            }
+        } else {
+            sender().sendMessage(C.GOLD + world + " is not an iris world.");
+            return;
+        }
+
+        if (dimension == null) {
+            sender().sendMessage(C.RED + "Could not determine Iris dimension for " + world + ".");
+            return;
+        }
+
+        sender().sendMessage(C.GREEN + "Loading world: " + world);
+
+        if (!registerWorldInBukkitYml(world, dimension, null)) {
+            return;
+        }
+
+        if (J.isFolia()) {
+            sender().sendMessage(C.YELLOW + "Folia cannot load new worlds at runtime. Restart the server to load \"" + world + "\".");
+            return;
+        }
+
+        Iris.instance.checkForBukkitWorlds(world::equals);
+        sender().sendMessage(C.GREEN + world + " loaded successfully.");
+    }
+    @Director(description = "Evacuate an iris world", origin = DirectorOrigin.PLAYER, sync = true)
+    public void evacuate(
+            @Param(description = "Evacuate the world")
+            World world
+    ) {
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "This is not an Iris world. Iris worlds: " + String.join(", ", getServer().getWorlds().stream().filter(IrisToolbelt::isIrisWorld).map(World::getName).toList()));
+            return;
+        }
+        sender().sendMessage(C.GREEN + "Evacuating world" + world.getName());
+        IrisToolbelt.evacuate(world);
+    }
+
+    boolean doesWorldExist(String worldName) {
+        File worldDirectory = IrisWorldStorage.dimensionRoot(worldName);
+        return worldDirectory.exists() && worldDirectory.isDirectory();
+    }
+
+    public static class PackDimensionTypeHandler implements DirectorParameterHandler<String> {
+        @Override
+        public KList<String> getPossibilities() {
+            Set<String> options = new LinkedHashSet<>();
+            options.add("default");
+
+            File packsFolder = Iris.instance.getDataFolder("packs");
+            File[] packs = packsFolder.listFiles();
+            if (packs != null) {
+                for (File pack : packs) {
+                    if (pack == null || !pack.isDirectory()) {
+                        continue;
+                    }
+
+                    options.add(pack.getName());
+
+                    try {
+                        IrisData data = IrisData.get(pack);
+                        for (String key : data.getDimensionLoader().getPossibleKeys()) {
+                            options.add(key);
+                            options.add(pack.getName() + ":" + key);
+                        }
+                    } catch (Throwable ex) {
+                        Iris.warn("Failed to read dimension keys from pack %s: %s%s",
+                                pack.getName(),
+                                ex.getClass().getSimpleName(),
+                                ex.getMessage() == null ? "" : " - " + ex.getMessage());
+                        Iris.reportError(ex);
+                    }
+                }
+            }
+
+            return new KList<>(options);
+        }
+
+        @Override
+        public String toString(String value) {
+            return value == null ? "" : value;
+        }
+
+        @Override
+        public String parse(String in, boolean force) throws DirectorParsingException {
+            if (in == null || in.trim().isEmpty()) {
+                throw new DirectorParsingException("World type cannot be empty");
+            }
+
+            return in.trim();
+        }
+
+        @Override
+        public boolean supports(Class<?> type) {
+            return type == String.class;
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandObject.java

@@ -0,0 +1,902 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.platform.bukkit.BukkitPlatform;
+import art.arcane.iris.core.link.WorldEditLink;
+import art.arcane.iris.core.loader.IrisData;
+import art.arcane.iris.core.loader.ResourceLoader;
+import art.arcane.iris.core.runtime.ObjectStudioActivation;
+import art.arcane.iris.core.runtime.WorldRuntimeControlService;
+import art.arcane.iris.core.service.ObjectSVC;
+import art.arcane.iris.core.service.StudioSVC;
+import art.arcane.iris.core.service.WandSVC;
+import art.arcane.iris.core.tools.IrisConverter;
+import art.arcane.iris.core.tools.PlausibilizeMode;
+import art.arcane.iris.core.tools.TreePlausibilizer;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IObjectPlacer;
+import art.arcane.iris.engine.object.IrisDimension;
+import art.arcane.iris.engine.object.IrisObject;
+import art.arcane.iris.engine.object.IrisObjectPlacement;
+import art.arcane.iris.engine.object.IrisObjectPlacementScaleInterpolator;
+import art.arcane.iris.engine.object.IrisObjectRotation;
+import art.arcane.iris.engine.object.StudioMode;
+import art.arcane.iris.engine.object.TileData;
+import art.arcane.iris.platform.bukkit.BukkitBlockState;
+import art.arcane.iris.spi.PlatformBlockState;
+import art.arcane.volmlib.util.data.Cuboid;
+import art.arcane.iris.util.common.data.IrisCustomData;
+import art.arcane.iris.util.common.data.registry.Materials;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.iris.util.common.director.specialhandlers.NullableDimensionHandler;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.util.common.director.specialhandlers.ObjectHandler;
+import art.arcane.iris.util.common.director.specialhandlers.ObjectTargetHandler;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.iris.util.common.math.Direction;
+import art.arcane.volmlib.util.math.RNG;
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.GameMode;
+import org.bukkit.HeightMap;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.Sound;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.util.Vector;
+
+import java.io.File;
+import java.io.IOException;
+import java.text.NumberFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
+
+@Director(name = "object", aliases = "o", origin = DirectorOrigin.PLAYER, description = "Iris object manipulation")
+public class CommandObject implements DirectorExecutor {
+    @Director(description = "Open an object studio world (grid of every object; dimension optional, defaults to all packs)", sync = true)
+    public void studio(
+            @Param(defaultValue = "null", description = "Optional dimension whose object pack to lay out; omit to aggregate objects from every pack", aliases = "dim", customHandler = NullableDimensionHandler.class)
+            IrisDimension dimension,
+            @Param(defaultValue = "1337", description = "The seed to generate the studio with", aliases = "s")
+            long seed
+    ) {
+        VolmitSender commandSender = sender();
+        Map<String, IrisData> sources = new LinkedHashMap<>();
+        IrisDimension hostDimension = dimension;
+
+        if (dimension != null) {
+            IrisData data = dimension.getLoader();
+            if (data == null) {
+                data = IrisData.get(dimension.getLoadFile().getParentFile().getParentFile());
+            }
+            sources.put(data.getDataFolder().getName(), data);
+        } else {
+            File workspace = Iris.service(StudioSVC.class).getWorkspaceFolder();
+            File[] packs = workspace == null ? null : workspace.listFiles();
+            if (packs != null) {
+                Arrays.sort(packs, Comparator.comparing(File::getName, String.CASE_INSENSITIVE_ORDER));
+                for (File pack : packs) {
+                    if (!pack.isDirectory()) continue;
+                    File dimensionsDir = new File(pack, "dimensions");
+                    if (!dimensionsDir.isDirectory()) continue;
+                    IrisData data = IrisData.get(pack);
+                    String[] keys = data.getObjectLoader().getPossibleKeys();
+                    if (keys == null || keys.length == 0) continue;
+                    sources.put(pack.getName(), data);
+                    if (hostDimension == null) {
+                        File[] dimFiles = dimensionsDir.listFiles((f) -> f.isFile() && f.getName().endsWith(".json"));
+                        if (dimFiles != null && dimFiles.length > 0) {
+                            String loadKey = dimFiles[0].getName().replaceFirst("\\.json$", "");
+                            IrisDimension loaded = data.getDimensionLoader().load(loadKey);
+                            if (loaded != null) {
+                                hostDimension = loaded;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        if (hostDimension == null || sources.isEmpty()) {
+            commandSender.sendMessage(C.RED + "No packs with objects were found on this server.");
+            return;
+        }
+
+        int totalObjects = 0;
+        for (IrisData d : sources.values()) {
+            String[] k = d.getObjectLoader().getPossibleKeys();
+            if (k != null) totalObjects += k.length;
+        }
+        if (totalObjects == 0) {
+            commandSender.sendMessage(C.RED + "No objects to place across the selected pack(s).");
+            return;
+        }
+
+        hostDimension.setStudioMode(StudioMode.OBJECT_BUFFET);
+        ObjectStudioActivation.activate(hostDimension.getLoadKey());
+        ObjectStudioActivation.setSources(hostDimension.getLoadKey(), sources);
+
+        String scope = dimension == null
+                ? ("all packs [" + sources.size() + "]")
+                : ("\"" + hostDimension.getName() + "\"");
+        commandSender.sendMessage(C.GREEN + "Opening Object Studio for " + scope + " ("
+                + totalObjects + " objects)");
+
+        IrisDimension finalHost = hostDimension;
+        try {
+            Iris.service(StudioSVC.class).open(commandSender, seed, hostDimension.getLoadKey(), world -> {
+                if (world == null) return;
+                try {
+                    WorldRuntimeControlService.get().applyObjectStudioWorldRules(world);
+                } catch (Throwable e) {
+                    Iris.reportError("Failed to apply object studio world rules for " + world.getName(), e);
+                }
+
+                if (commandSender.isPlayer()) {
+                    Player p = commandSender.player();
+                    if (p != null) {
+                        Location target = new Location(world, 0.5D, 66D, 0.5D);
+                        J.runEntity(p, () -> {
+                            BukkitPlatform.teleportAsync(p, target).thenRun(() -> p.setGameMode(GameMode.CREATIVE));
+                        });
+                    }
+                }
+            });
+        } catch (Throwable e) {
+            Iris.reportError("Failed to open object studio world \"" + finalHost.getLoadKey() + "\".", e);
+            commandSender.sendMessage(C.RED + "Failed to open object studio: " + e.getMessage());
+        }
+    }
+
+    private static final Set<Material> skipBlocks = Set.of(Materials.GRASS, Material.SNOW, Material.VINE, Material.TORCH, Material.DEAD_BUSH,
+            Material.POPPY, Material.DANDELION);
+
+    public static IObjectPlacer createPlacer(World world, Map<Block, BlockData> futureBlockChanges) {
+
+        return new IObjectPlacer() {
+            @Override
+            public int getHighest(int x, int z, IrisData data) {
+                return world.getHighestBlockYAt(x, z);
+            }
+
+            @Override
+            public int getHighest(int x, int z, IrisData data, boolean ignoreFluid) {
+                return world.getHighestBlockYAt(x, z, ignoreFluid ? HeightMap.OCEAN_FLOOR : HeightMap.MOTION_BLOCKING);
+            }
+
+            @Override
+            public void set(int x, int y, int z, PlatformBlockState s) {
+                BlockData d = (BlockData) s.nativeHandle();
+                Block block = world.getBlockAt(x, y, z);
+
+                //Prevent blocks being set in or bellow bedrock
+                if (y <= world.getMinHeight() || block.getType() == Material.BEDROCK) return;
+
+                futureBlockChanges.put(block, block.getBlockData());
+
+                if (d instanceof IrisCustomData data) {
+                    block.setBlockData(data.getBase(), false);
+                    Iris.warn("Tried to place custom block at " + x + ", " + y + ", " + z + " which is not supported!");
+                } else block.setBlockData(d, false);
+            }
+
+            @Override
+            public PlatformBlockState get(int x, int y, int z) {
+                return BukkitBlockState.of(world.getBlockAt(x, y, z).getBlockData());
+            }
+
+            @Override
+            public boolean isPreventingDecay() {
+                return false;
+            }
+
+            @Override
+            public boolean isCarved(int x, int y, int z) {
+                return false;
+            }
+
+            @Override
+            public boolean isSolid(int x, int y, int z) {
+                return world.getBlockAt(x, y, z).getType().isSolid();
+            }
+
+            @Override
+            public boolean isUnderwater(int x, int z) {
+                return false;
+            }
+
+            @Override
+            public int getFluidHeight() {
+                return 63;
+            }
+
+            @Override
+            public boolean isDebugSmartBore() {
+                return false;
+            }
+
+            @Override
+            public void setTile(int xx, int yy, int zz, TileData tile) {
+                tile.toBukkitTry(world.getBlockAt(xx, yy, zz));
+            }
+
+            @Override
+            public <T> void setData(int xx, int yy, int zz, T data) {
+
+            }
+
+            @Override
+            public <T> T getData(int xx, int yy, int zz, Class<T> t) {
+                return null;
+            }
+
+            @Override
+            public Engine getEngine() {
+                return null;
+            }
+        };
+    }
+
+    @Director(description = "Check the composition of an object")
+    public void analyze(
+            @Param(description = "The object to analyze", customHandler = ObjectHandler.class)
+            String object
+    ) {
+        IrisObject o = IrisData.loadAnyObject(object, data());
+        sender().sendMessage("Object Size: " + o.getW() + " * " + o.getH() + " * " + o.getD() + "");
+        sender().sendMessage("Blocks Used: " + NumberFormat.getIntegerInstance().format(o.getBlocks().size()));
+
+        var queue = o.getBlocks().values();
+        Map<Material, Set<BlockData>> unsorted = new HashMap<>();
+        Map<BlockData, Integer> amounts = new HashMap<>();
+        Map<Material, Integer> materials = new HashMap<>();
+        while (queue.hasNext()) {
+            BlockData block = (BlockData) queue.next().nativeHandle();
+
+            //unsorted.put(block.getMaterial(), block);
+
+            if (!amounts.containsKey(block)) {
+                amounts.put(block, 1);
+
+
+            } else
+                amounts.put(block, amounts.get(block) + 1);
+
+            if (!materials.containsKey(block.getMaterial())) {
+                materials.put(block.getMaterial(), 1);
+                unsorted.put(block.getMaterial(), new HashSet<>());
+                unsorted.get(block.getMaterial()).add(block);
+            } else {
+                materials.put(block.getMaterial(), materials.get(block.getMaterial()) + 1);
+                unsorted.get(block.getMaterial()).add(block);
+            }
+
+        }
+
+        List<Material> sortedMatsList = amounts.keySet().stream().map(BlockData::getMaterial)
+                .sorted().toList();
+        Set<Material> sortedMats = new TreeSet<>(Comparator.comparingInt(materials::get).reversed());
+        sortedMats.addAll(sortedMatsList);
+        sender().sendMessage("== Blocks in object ==");
+
+        int n = 0;
+        for (Material mat : sortedMats) {
+            int amount = materials.get(mat);
+            List<BlockData> set = new ArrayList<>(unsorted.get(mat));
+            set.sort(Comparator.comparingInt(amounts::get).reversed());
+            BlockData data = set.get(0);
+            int dataAmount = amounts.get(data);
+
+            String string = " - " + mat.toString() + "*" + amount;
+            if (data.getAsString(true).contains("[")) {
+                string = string + " --> [" + data.getAsString(true).split("\\[")[1]
+                        .replaceAll("true", ChatColor.GREEN + "true" + ChatColor.GRAY)
+                        .replaceAll("false", ChatColor.RED + "false" + ChatColor.GRAY) + "*" + dataAmount;
+            }
+
+            sender().sendMessage(string);
+
+            n++;
+
+            if (n >= 10) {
+                sender().sendMessage("  + " + (sortedMats.size() - n) + " other block types");
+                return;
+            }
+        }
+    }
+
+    @Director(description = "Shrink an object to its minimum size")
+    public void shrink(@Param(description = "The object to shrink", customHandler = ObjectHandler.class) String object) {
+        IrisObject o = IrisData.loadAnyObject(object, data());
+        sender().sendMessage("Current Object Size: " + o.getW() + " * " + o.getH() + " * " + o.getD());
+        o.shrinkwrap();
+        sender().sendMessage("New Object Size: " + o.getW() + " * " + o.getH() + " * " + o.getD());
+        try {
+            o.write(o.getLoadFile());
+        } catch (IOException e) {
+            sender().sendMessage("Failed to save object " + o.getLoadFile() + ": " + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+
+    @Director(description = "Make tree leaves vanilla-decay-plausible (every leaf within 6 blocks of a log)",
+            origin = DirectorOrigin.BOTH)
+    public void plausibilize(
+            @Param(description = "Object key, prefix (trees/), or filesystem path",
+                    customHandler = ObjectTargetHandler.class)
+            String target,
+            @Param(description = "DEFAULT: tentacle logs, delete orphans. NORMALIZE: + flip persistent=false. FOLIAGE_OVERATURE: add leaves to bridge orphans, no deletions. SMOKE: wipe & repaint canopy shell.",
+                    defaultValue = "DEFAULT")
+            PlausibilizeMode mode,
+            @Param(description = "Analyze only, do not write", defaultValue = "false")
+            boolean dryRun,
+            @Param(description = "Canopy shell radius (SMOKE only), clamped [0,5]", defaultValue = "2")
+            int radius
+    ) {
+        List<Target> targets = resolveTargets(target);
+        if (targets.isEmpty()) {
+            sender().sendMessage(C.RED + "No objects matched: " + target);
+            return;
+        }
+
+        sender().sendMessage(C.IRIS + "Plausibilize [" + mode.name()
+                + (dryRun ? " DRY" : "")
+                + (mode == PlausibilizeMode.SMOKE ? " r=" + radius : "")
+                + "] queued " + targets.size() + " object(s)");
+
+        org.bukkit.command.CommandSender s = sender();
+        J.a(() -> runPlausibilize(targets, dryRun, mode, radius, s));
+    }
+
+    private List<Target> resolveTargets(String target) {
+        List<Target> out = new ArrayList<>();
+        if (target == null || target.isEmpty()) {
+            return out;
+        }
+
+        File direct = new File(target);
+        if (direct.isFile() && target.toLowerCase().endsWith(".iob")) {
+            out.add(new Target(direct.getName().replaceAll("\\.iob$", ""), direct));
+            return out;
+        }
+        if (direct.isDirectory()) {
+            walkIob(direct, direct, out);
+            return out;
+        }
+
+        IrisData irisData = data();
+        if (irisData != null) {
+            ResourceLoader<IrisObject> loader = irisData.getObjectLoader();
+            if (!target.endsWith("/") && loader.findFile(target) != null) {
+                out.add(new Target(target, null));
+                return out;
+            }
+            String prefix = target.endsWith("/") ? target : target + "/";
+            for (String k : loader.getPossibleKeys()) {
+                if (k.startsWith(prefix)) {
+                    out.add(new Target(k, null));
+                }
+            }
+            return out;
+        }
+
+        File packsFolder = Iris.instance.getDataFolder("packs");
+        File[] packs = packsFolder.listFiles(File::isDirectory);
+        if (packs != null) {
+            for (File pack : packs) {
+                File objectsRoot = new File(pack, "objects");
+                if (!objectsRoot.isDirectory()) continue;
+                File candidate = new File(objectsRoot, target + ".iob");
+                if (candidate.isFile()) {
+                    out.add(new Target(pack.getName() + "/" + target, candidate));
+                    continue;
+                }
+                File candidateDir = new File(objectsRoot, target);
+                if (candidateDir.isDirectory()) {
+                    walkIob(candidateDir, objectsRoot, out);
+                }
+            }
+        }
+        return out;
+    }
+
+    private static void walkIob(File root, File keyRoot, List<Target> out) {
+        File[] kids = root.listFiles();
+        if (kids == null) return;
+        for (File f : kids) {
+            if (f.isDirectory()) {
+                walkIob(f, keyRoot, out);
+            } else if (f.getName().toLowerCase().endsWith(".iob")) {
+                String rel = keyRoot.toPath().relativize(f.toPath()).toString()
+                        .replace(File.separatorChar, '/')
+                        .replaceAll("\\.iob$", "");
+                out.add(new Target(rel, f));
+            }
+        }
+    }
+
+    private record Target(String key, File file) {
+    }
+
+    private static void runPlausibilize(
+            List<Target> targets,
+            boolean dryRun,
+            PlausibilizeMode mode,
+            int radius,
+            org.bukkit.command.CommandSender s
+    ) {
+        int processed = 0;
+        int skipped = 0;
+        int failed = 0;
+        int changed = 0;
+        long totalLogsAdded = 0L;
+        long totalLeavesAdded = 0L;
+        long totalLeavesRemoved = 0L;
+        long totalNormalized = 0L;
+        long totalUnreachableAfter = 0L;
+
+        int progressStep = Math.max(1, targets.size() / 20);
+        int index = 0;
+
+        for (Target t : targets) {
+            index++;
+            try {
+                IrisObject o = loadTarget(t);
+                if (o == null) {
+                    s.sendMessage(C.YELLOW + "  skip " + t.key() + ": failed to load");
+                    skipped++;
+                    continue;
+                }
+
+                TreePlausibilizer.Result r = dryRun
+                        ? TreePlausibilizer.analyze(o, mode, radius)
+                        : TreePlausibilizer.apply(o, mode, radius);
+
+                if (r.skipReason() != null) {
+                    s.sendMessage(C.YELLOW + "  skip " + t.key() + ": " + r.skipReason());
+                    skipped++;
+                    continue;
+                }
+
+                boolean touched = r.logsAdded() > 0 || r.leavesAdded() > 0
+                        || r.leavesRemoved() > 0 || r.leavesNormalized() > 0;
+                if (!dryRun && touched) {
+                    File dest = o.getLoadFile() != null ? o.getLoadFile() : t.file();
+                    if (dest != null) {
+                        o.write(dest);
+                        changed++;
+                    }
+                }
+
+                processed++;
+                totalLogsAdded += r.logsAdded();
+                totalLeavesAdded += r.leavesAdded();
+                totalLeavesRemoved += r.leavesRemoved();
+                totalNormalized += r.leavesNormalized();
+                totalUnreachableAfter += r.unreachableAfter();
+
+                if (touched || targets.size() == 1) {
+                    s.sendMessage(C.GRAY + "  " + t.key()
+                            + C.WHITE + " +" + r.logsAdded() + " logs"
+                            + C.WHITE + " +" + r.leavesAdded() + " leaves"
+                            + C.WHITE + " -" + r.leavesRemoved() + " removed"
+                            + (r.leavesNormalized() > 0 ? C.WHITE + " ~" + r.leavesNormalized() + " normalized" : "")
+                            + (r.unreachableAfter() > 0 ? C.YELLOW + " " + r.unreachableAfter() + " unreachable" : ""));
+                }
+
+                if (targets.size() > 1 && index % progressStep == 0) {
+                    s.sendMessage(C.IRIS + "  [" + index + "/" + targets.size() + "]");
+                }
+            } catch (Throwable e) {
+                s.sendMessage(C.RED + "  fail " + t.key() + ": " + e.getClass().getSimpleName()
+                        + ": " + e.getMessage());
+                e.printStackTrace();
+                failed++;
+            }
+        }
+
+        s.sendMessage(C.IRIS + "Done: " + processed + " processed, " + changed + " changed, "
+                + skipped + " skipped, " + failed + " failed");
+        s.sendMessage(C.IRIS + "Totals: +" + totalLogsAdded + " logs, +" + totalLeavesAdded + " leaves, -"
+                + totalLeavesRemoved + " removed, ~" + totalNormalized + " normalized, "
+                + totalUnreachableAfter + " unreachable");
+    }
+
+    private static IrisObject loadTarget(Target t) throws IOException {
+        if (t.file() != null) {
+            IrisObject o = new IrisObject();
+            o.read(t.file());
+            o.setLoadFile(t.file());
+            return o;
+        }
+        return IrisData.loadAnyObject(t.key(), null);
+    }
+
+    @Director(description = "Convert .schem files in the 'convert' folder to .iob files.")
+    public void convert () {
+        try {
+            IrisConverter.convertSchematics(sender());
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    @Director(description = "Get a powder that reveals objects", aliases = "d")
+    public void dust() {
+        player().getInventory().addItem(WandSVC.createDust());
+        sender().playSound(Sound.AMBIENT_SOUL_SAND_VALLEY_ADDITIONS, 1f, 1.5f);
+    }
+
+    @Director(description = "Contract a selection based on your looking direction", aliases = "-")
+    public void contract(
+            @Param(description = "The amount to inset by", defaultValue = "1")
+            int amount
+    ) {
+        if (!WandSVC.isHoldingWand(player())) {
+            sender().sendMessage("Hold your wand.");
+            return;
+        }
+
+
+        Location[] b = WandSVC.getCuboid(player());
+        if (b == null || b[0] == null || b[1] == null) {
+            sender().sendMessage("No area selected.");
+            return;
+        }
+        Location a1 = b[0].clone();
+        Location a2 = b[1].clone();
+        Cuboid cursor = new Cuboid(a1, a2);
+        Direction d = Direction.closest(player().getLocation().getDirection()).reverse();
+        assert d != null;
+        cursor = cursor.expand(d.f(), -amount);
+        b[0] = cursor.getLowerNE();
+        b[1] = cursor.getUpperSW();
+        player().getInventory().setItemInMainHand(WandSVC.createWand(b[0], b[1]));
+        player().updateInventory();
+        sender().playSound(Sound.ENTITY_ITEM_FRAME_ROTATE_ITEM, 1f, 0.55f);
+    }
+
+    @Director(description = "Set point 1 to look", aliases = "p1")
+    public void position1(
+            @Param(description = "Whether to use your current position, or where you look", defaultValue = "true")
+            boolean here
+    ) {
+        if (!WandSVC.isHoldingWand(player())) {
+            sender().sendMessage("Ready your Wand.");
+            return;
+        }
+
+        if (WandSVC.isHoldingWand(player())) {
+            Location[] g = WandSVC.getCuboid(player());
+
+            if (g == null) {
+                return;
+            }
+            if (!here) {
+                // TODO: WARNING HEIGHT
+                g[1] = player().getTargetBlock(null, 256).getLocation().clone();
+            } else {
+                g[1] = player().getLocation().getBlock().getLocation().clone().add(0, -1, 0);
+            }
+            player().getInventory().setItemInMainHand(WandSVC.createWand(g[0], g[1]));
+        }
+    }
+
+    @Director(description = "Set point 2 to look", aliases = "p2")
+    public void position2(
+            @Param(description = "Whether to use your current position, or where you look", defaultValue = "true")
+            boolean here
+    ) {
+        if (!WandSVC.isHoldingWand(player())) {
+            sender().sendMessage("Ready your Wand.");
+            return;
+        }
+
+        if (WandSVC.isHoldingIrisWand(player())) {
+            Location[] g = WandSVC.getCuboid(player());
+
+            if (g == null) {
+                return;
+            }
+
+            if (!here) {
+                // TODO: WARNING HEIGHT
+                g[0] = player().getTargetBlock(null, 256).getLocation().clone();
+            } else {
+                g[0] = player().getLocation().getBlock().getLocation().clone().add(0, -1, 0);
+            }
+            player().getInventory().setItemInMainHand(WandSVC.createWand(g[0], g[1]));
+        }
+    }
+
+    @Director(description = "Paste an object", sync = true)
+    public void paste(
+            @Param(description = "The object to paste", customHandler = ObjectHandler.class)
+            String object,
+            @Param(description = "Whether or not to edit the object (need to hold wand)", defaultValue = "false")
+            boolean edit,
+            @Param(description = "The amount of degrees to rotate by", defaultValue = "0")
+            int rotate,
+            @Param(description = "The factor by which to scale the object placement", defaultValue = "1")
+            double scale
+//            ,
+//            @Param(description = "The scale interpolator to use", defaultValue = "none")
+//            IrisObjectPlacementScaleInterpolator interpolator
+    ) {
+        IrisObject o = IrisData.loadAnyObject(object, data());
+        double maxScale = Double.max(10 - o.getBlocks().size() / 10000d, 1);
+        if (scale > maxScale) {
+            sender().sendMessage(C.YELLOW + "Indicated scale exceeds maximum. Downscaled to maximum: " + maxScale);
+            scale = maxScale;
+        }
+
+        sender().playSound(Sound.BLOCK_ENCHANTMENT_TABLE_USE, 1f, 1.5f);
+
+        IrisObjectPlacement placement = new IrisObjectPlacement();
+        placement.setRotation(IrisObjectRotation.of(0, rotate, 0));
+
+        ItemStack wand = player().getInventory().getItemInMainHand();
+        Location block = player().getTargetBlock(skipBlocks, 256).getLocation().clone().add(0, 1, 0);
+
+        Map<Block, BlockData> futureChanges = new HashMap<>();
+
+        if (scale != 1) {
+            o = o.scaled(scale, IrisObjectPlacementScaleInterpolator.TRICUBIC);
+        }
+
+        o.place(block.getBlockX(), block.getBlockY() + (int) o.getCenter().getY(), block.getBlockZ(), createPlacer(block.getWorld(), futureChanges), placement, new RNG(), null);
+
+        Iris.service(ObjectSVC.class).addChanges(futureChanges);
+
+        if (edit) {
+            Vector center = new Vector(o.getCenter().getX(), o.getCenter().getY(), o.getCenter().getZ());
+            ItemStack newWand = WandSVC.createWand(block.clone().subtract(center).add(o.getW() - 1,
+                    o.getH() + center.getY() - 1, o.getD() - 1), block.clone().subtract(center.clone().setY(0)));
+            if (WandSVC.isWand(wand)) {
+                wand = newWand;
+                player().getInventory().setItemInMainHand(wand);
+                sender().sendMessage("Updated wand for " + "objects/" + o.getLoadKey() + ".iob ");
+            } else {
+                int slot = WandSVC.findWand(player().getInventory());
+                if (slot == -1) {
+                    player().getInventory().addItem(newWand);
+                    sender().sendMessage("Given new wand for " + "objects/" + o.getLoadKey() + ".iob ");
+                } else {
+                    player().getInventory().setItem(slot, newWand);
+                    sender().sendMessage("Updated wand for " + "objects/" + o.getLoadKey() + ".iob ");
+                }
+            }
+        } else {
+            sender().sendMessage(C.IRIS + "Placed " + object);
+        }
+    }
+
+    @Director(description = "Save an object")
+    public void save(
+            @Param(description = "The dimension to store the object in", contextual = true)
+            IrisDimension dimension,
+            @Param(description = "The file to store it in, can use / for subfolders")
+            String name,
+            @Param(description = "Overwrite existing object files", defaultValue = "false", aliases = "force")
+            boolean overwrite,
+            @Param(description = "Use legacy TileState serialization if possible", defaultValue = "true")
+            boolean legacy
+    ) {
+        IrisObject o = WandSVC.createSchematic(player(), legacy);
+
+        if (o == null) {
+            sender().sendMessage(C.YELLOW + "You need to hold your wand!");
+            return;
+        }
+
+        File file = Iris.service(StudioSVC.class).getWorkspaceFile(dimension.getLoadKey(), "objects", name + ".iob");
+
+        if (file.exists() && !overwrite) {
+            sender().sendMessage(C.RED + "File already exists. Set overwrite=true to overwrite it.");
+            return;
+        }
+        try {
+            o.write(file, sender());
+        } catch (IOException e) {
+            sender().sendMessage(C.RED + "Failed to save object because of an IOException: " + e.getMessage());
+            Iris.reportError(e);
+        }
+
+        sender().playSound(Sound.BLOCK_ENCHANTMENT_TABLE_USE, 1f, 1.5f);
+        sender().sendMessage(C.GREEN + "Successfully object to saved: " + dimension.getLoadKey() + "/objects/" + name);
+    }
+
+    @Director(description = "Shift a selection in your looking direction")
+    public void shift(
+            @Param(description = "The amount to shift by", defaultValue = "1")
+            int amount
+    ) {
+        if (!WandSVC.isHoldingWand(player())) {
+            sender().sendMessage("Hold your wand.");
+            return;
+        }
+
+        Location[] b = WandSVC.getCuboid(player());
+        if (b == null || b[0] == null || b[1] == null) {
+            sender().sendMessage("No area selected.");
+            return;
+        }
+        Location a1 = b[0].clone();
+        Location a2 = b[1].clone();
+        Direction d = Direction.closest(player().getLocation().getDirection()).reverse();
+        if (d == null) {
+            return; // HOW DID THIS HAPPEN
+        }
+        a1.add(d.toVector().multiply(amount));
+        a2.add(d.toVector().multiply(amount));
+        Cuboid cursor = new Cuboid(a1, a2);
+        b[0] = cursor.getLowerNE();
+        b[1] = cursor.getUpperSW();
+        player().getInventory().setItemInMainHand(WandSVC.createWand(b[0], b[1]));
+        player().updateInventory();
+        sender().playSound(Sound.ENTITY_ITEM_FRAME_ROTATE_ITEM, 1f, 0.55f);
+    }
+
+    @Director(description = "Undo a number of pastes", aliases = "u")
+    public void undo(
+            @Param(description = "The amount of pastes to undo", defaultValue = "1")
+            int amount
+    ) {
+        ObjectSVC service = Iris.service(ObjectSVC.class);
+        int actualReverts = Math.min(service.getUndos().size(), amount);
+        service.revertChanges(actualReverts);
+        sender().sendMessage(C.BLUE + "Reverted " + actualReverts + C.BLUE +" pastes!");
+    }
+
+    @Director(description = "Gets an object wand and grabs the current WorldEdit selection.", aliases = "we", origin = DirectorOrigin.PLAYER)
+    public void we() {
+        if (!Bukkit.getPluginManager().isPluginEnabled("WorldEdit")) {
+            sender().sendMessage(C.RED + "You can't get a WorldEdit selection without WorldEdit, you know.");
+            return;
+        }
+
+        Cuboid locs = WorldEditLink.getSelection(sender().player());
+
+        if (locs == null) {
+            sender().sendMessage(C.RED + "You don't have a WorldEdit selection in this world.");
+            return;
+        }
+
+        sender().player().getInventory().addItem(WandSVC.createWand(locs.getLowerNE(), locs.getUpperSW()));
+        sender().sendMessage(C.GREEN + "A fresh wand with your current WorldEdit selection on it!");
+    }
+
+    @Director(description = "Get an object wand", sync = true)
+    public void wand() {
+        player().getInventory().addItem(WandSVC.createWand());
+        sender().playSound(Sound.ITEM_ARMOR_EQUIP_NETHERITE, 1f, 1.5f);
+        sender().sendMessage(C.GREEN + "Poof! Good luck building!");
+    }
+
+    @Director(name = "x&y", description = "Autoselect up, down & out", sync = true)
+    public void xay() {
+        if (!WandSVC.isHoldingWand(player())) {
+            sender().sendMessage(C.YELLOW + "Hold your wand!");
+            return;
+        }
+
+        Location[] b = WandSVC.getCuboid(player());
+        if (b == null || b[0] == null || b[1] == null) {
+            sender().sendMessage("No area selected.");
+            return;
+        }
+        Location a1 = b[0].clone();
+        Location a2 = b[1].clone();
+        Location a1x = b[0].clone();
+        Location a2x = b[1].clone();
+        Cuboid cursor = new Cuboid(a1, a2);
+        Cuboid cursorx = new Cuboid(a1, a2);
+
+        while (!cursor.containsOnly(Material.AIR)) {
+            a1.add(new org.bukkit.util.Vector(0, 1, 0));
+            a2.add(new org.bukkit.util.Vector(0, 1, 0));
+            cursor = new Cuboid(a1, a2);
+        }
+
+        a1.add(new org.bukkit.util.Vector(0, -1, 0));
+        a2.add(new org.bukkit.util.Vector(0, -1, 0));
+
+        while (!cursorx.containsOnly(Material.AIR)) {
+            a1x.add(new org.bukkit.util.Vector(0, -1, 0));
+            a2x.add(new org.bukkit.util.Vector(0, -1, 0));
+            cursorx = new Cuboid(a1x, a2x);
+        }
+
+        a1x.add(new org.bukkit.util.Vector(0, 1, 0));
+        a2x.add(new Vector(0, 1, 0));
+        b[0] = a1;
+        b[1] = a2x;
+        cursor = new Cuboid(b[0], b[1]);
+        cursor = cursor.contract(Cuboid.CuboidDirection.North);
+        cursor = cursor.contract(Cuboid.CuboidDirection.South);
+        cursor = cursor.contract(Cuboid.CuboidDirection.East);
+        cursor = cursor.contract(Cuboid.CuboidDirection.West);
+        b[0] = cursor.getLowerNE();
+        b[1] = cursor.getUpperSW();
+        player().getInventory().setItemInMainHand(WandSVC.createWand(b[0], b[1]));
+        player().updateInventory();
+        sender().playSound(Sound.ENTITY_ITEM_FRAME_ROTATE_ITEM, 1f, 0.55f);
+        sender().sendMessage(C.GREEN + "Auto-select complete!");
+    }
+
+    @Director(name = "x+y", description = "Autoselect up & out", sync = true)
+    public void xpy() {
+        if (!WandSVC.isHoldingWand(player())) {
+            sender().sendMessage(C.YELLOW + "Hold your wand!");
+            return;
+        }
+
+        Location[] b = WandSVC.getCuboid(player());
+        if (b == null || b[0] == null || b[1] == null) {
+            sender().sendMessage("No area selected.");
+            return;
+        }
+        b[0].add(new Vector(0, 1, 0));
+        b[1].add(new Vector(0, 1, 0));
+        Location a1 = b[0].clone();
+        Location a2 = b[1].clone();
+        Cuboid cursor = new Cuboid(a1, a2);
+
+        while (!cursor.containsOnly(Material.AIR)) {
+            a1.add(new Vector(0, 1, 0));
+            a2.add(new Vector(0, 1, 0));
+            cursor = new Cuboid(a1, a2);
+        }
+
+        a1.add(new Vector(0, -1, 0));
+        a2.add(new Vector(0, -1, 0));
+        b[0] = a1;
+        a2 = b[1];
+        cursor = new Cuboid(a1, a2);
+        cursor = cursor.contract(Cuboid.CuboidDirection.North);
+        cursor = cursor.contract(Cuboid.CuboidDirection.South);
+        cursor = cursor.contract(Cuboid.CuboidDirection.East);
+        cursor = cursor.contract(Cuboid.CuboidDirection.West);
+        b[0] = cursor.getLowerNE();
+        b[1] = cursor.getUpperSW();
+        player().getInventory().setItemInMainHand(WandSVC.createWand(b[0], b[1]));
+        player().updateInventory();
+        sender().playSound(Sound.ENTITY_ITEM_FRAME_ROTATE_ITEM, 1f, 0.55f);
+        sender().sendMessage(C.GREEN + "Auto-select complete!");
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandPack.java

@@ -0,0 +1,259 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.pack.PackDirectoryResolver;
+import art.arcane.iris.core.pack.PackResourceCleanup;
+import art.arcane.iris.core.pack.PackValidationRegistry;
+import art.arcane.iris.core.pack.PackValidationResult;
+import art.arcane.iris.core.pack.PackValidator;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+
+import java.io.File;
+import java.util.List;
+
+@Director(name = "pack", aliases = {"pk"}, description = "Pack validation and maintenance")
+public class CommandPack implements DirectorExecutor {
+    @Director(description = "Validate a pack (or all packs) and re-publish results", aliases = {"v"})
+    public void validate(
+            @Param(description = "The pack folder name to validate (leave empty for all)", defaultValue = "")
+            String pack
+    ) {
+        VolmitSender s = sender();
+        File packsRoot = Iris.instance.getDataFolder("packs");
+        if (!packsRoot.isDirectory()) {
+            s.sendMessage(C.RED + "packs/ folder not found.");
+            return;
+        }
+
+        if (pack == null || pack.isBlank()) {
+            File[] dirs = packsRoot.listFiles(File::isDirectory);
+            if (dirs == null || dirs.length == 0) {
+                s.sendMessage(C.YELLOW + "No packs to validate.");
+                return;
+            }
+            int broken = 0;
+            for (File dir : dirs) {
+                PackValidationResult result = runValidate(s, dir);
+                if (result != null && !result.isLoadable()) {
+                    broken++;
+                }
+            }
+            s.sendMessage(C.GREEN + "Validation complete. Broken packs: " + broken + "/" + dirs.length);
+            return;
+        }
+
+        File target = PackDirectoryResolver.resolveExisting(packsRoot, pack);
+        if (target == null) {
+            s.sendMessage(C.RED + "Pack '" + pack + "' not found under packs/.");
+            return;
+        }
+        runValidate(s, target);
+    }
+
+    @Director(description = "Preview or apply unused-resource cleanup", aliases = {"c"})
+    public void cleanup(
+            @Param(description = "The pack folder name to clean")
+            String pack,
+            @Param(description = "preview or apply", defaultValue = "preview")
+            String mode
+    ) {
+        VolmitSender s = sender();
+        File packFolder = findPack(s, pack);
+        if (packFolder == null) {
+            return;
+        }
+        if ("apply".equalsIgnoreCase(mode)) {
+            PackResourceCleanup.ApplyResult result = PackResourceCleanup.apply(packFolder);
+            if (!result.success()) {
+                s.sendMessage(C.RED + result.error());
+                reportPaths(s, result.quarantinedPaths(), "still quarantined");
+                return;
+            }
+            if (!result.changed()) {
+                s.sendMessage(C.GREEN + "No cleanup candidates found for pack '" + pack + "'.");
+                return;
+            }
+            s.sendMessage(C.GREEN + "Quarantined " + result.quarantinedPaths().size()
+                    + " cleanup candidate(s) under " + result.quarantinePath() + ".");
+            reportPaths(s, result.quarantinedPaths(), "quarantined");
+            return;
+        }
+        if (!"preview".equalsIgnoreCase(mode)) {
+            s.sendMessage(C.RED + "Cleanup mode must be preview or apply.");
+            return;
+        }
+        PackResourceCleanup.Preview preview = PackResourceCleanup.preview(packFolder);
+        if (!preview.success()) {
+            s.sendMessage(C.RED + preview.error());
+            return;
+        }
+        if (!preview.hasCandidates()) {
+            s.sendMessage(C.GREEN + "No cleanup candidates found for pack '" + pack + "'.");
+            return;
+        }
+        s.sendMessage(C.YELLOW + "Cleanup preview for pack '" + pack + "': "
+                + preview.candidatePaths().size() + " candidate(s). No files were changed.");
+        reportPaths(s, preview.candidatePaths(), "candidate");
+        s.sendMessage(C.GRAY + "Run /iris pack cleanup " + pack + " mode=apply to quarantine these candidates after a fresh scan.");
+    }
+
+    @Director(description = "Preview or apply restoration of the latest quarantine", aliases = {"r"})
+    public void restore(
+            @Param(description = "The pack folder name to restore")
+            String pack,
+            @Param(description = "preview or apply", defaultValue = "preview")
+            String mode
+    ) {
+        VolmitSender s = sender();
+        File packFolder = findPack(s, pack);
+        if (packFolder == null) {
+            return;
+        }
+        if ("apply".equalsIgnoreCase(mode)) {
+            PackResourceCleanup.RestoreResult result = PackResourceCleanup.restoreLatest(packFolder);
+            if (!result.conflicts().isEmpty()) {
+                s.sendMessage(C.RED + "Restore refused because " + result.conflicts().size() + " destination(s) already exist.");
+                reportPaths(s, result.conflicts(), "conflict");
+                return;
+            }
+            if (!result.success()) {
+                s.sendMessage(C.RED + result.error());
+                return;
+            }
+            if (!result.changed()) {
+                s.sendMessage(C.YELLOW + "Nothing to restore for pack '" + pack + "'.");
+                return;
+            }
+            s.sendMessage(C.GREEN + "Restored " + result.restoredPaths().size()
+                    + " file(s) from " + result.dumpPath() + ".");
+            reportPaths(s, result.restoredPaths(), "restored");
+            return;
+        }
+        if (!"preview".equalsIgnoreCase(mode)) {
+            s.sendMessage(C.RED + "Restore mode must be preview or apply.");
+            return;
+        }
+        PackResourceCleanup.RestorePreview preview = PackResourceCleanup.previewRestore(packFolder);
+        if (!preview.success()) {
+            s.sendMessage(C.RED + preview.error());
+            return;
+        }
+        if (!preview.hasFiles()) {
+            s.sendMessage(C.YELLOW + "Nothing to restore for pack '" + pack + "'.");
+            return;
+        }
+        s.sendMessage(C.YELLOW + "Restore preview for " + preview.dumpPath() + ": "
+                + preview.filePaths().size() + " file(s). No files were changed.");
+        reportPaths(s, preview.filePaths(), "file");
+        if (!preview.conflicts().isEmpty()) {
+            s.sendMessage(C.RED + "Restore is blocked by " + preview.conflicts().size() + " existing destination(s).");
+            reportPaths(s, preview.conflicts(), "conflict");
+            return;
+        }
+        s.sendMessage(C.GRAY + "Run /iris pack restore " + pack + " mode=apply to restore after a fresh conflict check.");
+    }
+
+    @Director(description = "Show cached validation status for a pack", aliases = {"s"})
+    public void status(
+            @Param(description = "The pack folder name", defaultValue = "")
+            String pack
+    ) {
+        VolmitSender s = sender();
+        if (pack == null || pack.isBlank()) {
+            if (PackValidationRegistry.snapshot().isEmpty()) {
+                s.sendMessage(C.YELLOW + "No validation results recorded. Run /iris pack validate first.");
+                return;
+            }
+            PackValidationRegistry.snapshot().forEach((name, result) -> {
+                String tag = result.isLoadable() ? (C.GREEN + "OK") : (C.RED + "BROKEN");
+                s.sendMessage(tag + C.RESET + " " + name
+                        + C.GRAY + " (blocking=" + result.getBlockingErrors().size()
+                        + ", warnings=" + result.getWarnings().size() + ")");
+            });
+            return;
+        }
+        PackValidationResult result = PackValidationRegistry.get(pack);
+        if (result == null) {
+            s.sendMessage(C.YELLOW + "No validation result for '" + pack + "'. Run /iris pack validate " + pack + ".");
+            return;
+        }
+        reportResult(s, result);
+    }
+
+    private PackValidationResult runValidate(VolmitSender s, File packFolder) {
+        try {
+            PackValidationResult result = PackValidator.validate(packFolder);
+            PackValidationRegistry.publish(result);
+            reportResult(s, result);
+            return result;
+        } catch (Throwable e) {
+            Iris.reportError("Pack validation failed for '" + packFolder.getName() + "'", e);
+            s.sendMessage(C.RED + "Validation of '" + packFolder.getName() + "' failed: " + e.getMessage());
+            return null;
+        }
+    }
+
+    private void reportResult(VolmitSender s, PackValidationResult result) {
+        if (result.isLoadable()) {
+            s.sendMessage(C.GREEN + "Pack '" + result.getPackName() + "' is loadable."
+                    + C.GRAY + " (warnings=" + result.getWarnings().size() + ")");
+        } else {
+            s.sendMessage(C.RED + "Pack '" + result.getPackName() + "' is BROKEN:");
+            for (String reason : result.getBlockingErrors()) {
+                s.sendMessage(C.RED + "  - " + reason);
+            }
+        }
+        int wMax = Math.min(10, result.getWarnings().size());
+        for (int i = 0; i < wMax; i++) {
+            s.sendMessage(C.YELLOW + "  ! " + result.getWarnings().get(i));
+        }
+        if (result.getWarnings().size() > wMax) {
+            s.sendMessage(C.GRAY + "  ... and " + (result.getWarnings().size() - wMax) + " more warning(s).");
+        }
+    }
+
+    private File findPack(VolmitSender sender, String pack) {
+        if (pack == null || pack.isBlank()) {
+            sender.sendMessage(C.RED + "You must specify a pack name.");
+            return null;
+        }
+        File packFolder = PackDirectoryResolver.resolveExisting(Iris.instance.getDataFolder("packs"), pack);
+        if (packFolder == null) {
+            sender.sendMessage(C.RED + "Pack '" + pack + "' not found under packs/.");
+            return null;
+        }
+        return packFolder;
+    }
+
+    private void reportPaths(VolmitSender sender, List<String> paths, String label) {
+        int max = Math.min(10, paths.size());
+        for (int i = 0; i < max; i++) {
+            sender.sendMessage(C.GRAY + "  - " + label + ": " + paths.get(i));
+        }
+        if (paths.size() > max) {
+            sender.sendMessage(C.GRAY + "  ... and " + (paths.size() - max) + " more.");
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandPregen.java

@@ -0,0 +1,123 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.gui.PregeneratorJob;
+import art.arcane.iris.core.pregenerator.PregenTask;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.format.Form;
+import art.arcane.volmlib.util.math.Position2;
+import org.bukkit.World;
+import org.bukkit.util.Vector;
+
+@Director(name = "pregen", aliases = "pregenerate", description = "Pregenerate your Iris worlds!")
+public class CommandPregen implements DirectorExecutor {
+    @Director(description = "Pregenerate a world")
+    public void start(
+            @Param(description = "The radius of the pregen in blocks", aliases = "size")
+            int radius,
+            @Param(description = "The world to pregen", contextual = true)
+            World world,
+            @Param(aliases = "middle", description = "The center location of the pregen. Use \"me\" for your current location", defaultValue = "0,0")
+            Vector center,
+            @Param(description = "Open the Iris pregen gui", defaultValue = "true")
+            boolean gui,
+            @Param(name = "serial", description = "Generate only one chunk at a time", defaultValue = "false")
+            boolean serial
+            ) {
+        if (radius <= 0) {
+            sender().sendMessage(C.RED + "Pregen radius must be greater than zero blocks.");
+            return;
+        }
+        if (serial && !IrisToolbelt.supportsStrictSerialPregeneration()) {
+            sender().sendMessage(C.RED + "Strict serial pregeneration requires Paper or a Paper-compatible server.");
+            return;
+        }
+
+        try {
+            if (sender().isPlayer() && access() == null) {
+                sender().sendMessage(C.RED + "The engine access for this world is null!");
+                sender().sendMessage(C.RED + "Please make sure the world is loaded & the engine is initialized. Generate a new chunk, for example.");
+            }
+            PregenTask task = PregenTask
+                    .builder()
+                    .center(new Position2(center.getBlockX(), center.getBlockZ()))
+                    .gui(gui)
+                    .radiusX(radius)
+                    .radiusZ(radius)
+                    .build();
+            if (serial) {
+                IrisToolbelt.pregenerateSerial(task, world);
+            } else {
+                IrisToolbelt.pregenerate(task, world);
+            }
+            String msg = C.GREEN + "Pregen started in " + C.GOLD + world.getName() + C.GREEN + " of " + C.GOLD + (radius * 2) + C.GREEN + " by " + C.GOLD + (radius * 2) + C.GREEN + " blocks from " + C.GOLD + center.getX() + "," + center.getZ();
+            sender().sendMessage(msg);
+            Iris.info(msg);
+        } catch (Throwable e) {
+            sender().sendMessage(C.RED + "Failed to start pregeneration. See console for details.");
+            Iris.reportError(e);
+            e.printStackTrace();
+        }
+    }
+
+    @Director(description = "Stop the active pregeneration task", aliases = "x")
+    public void stop() {
+        if (PregeneratorJob.shutdownInstance()) {
+            String message = C.BLUE + "Pregen stop requested; finishing active work before cancellation.";
+            sender().sendMessage(message);
+            Iris.info(message);
+        } else {
+            sender().sendMessage(C.YELLOW + "No active pregeneration tasks to stop");
+        }
+    }
+
+    @Director(description = "Pause / continue the active pregeneration task", aliases = {"resume"})
+    public void pause() {
+        if (PregeneratorJob.pauseResume()) {
+            sender().sendMessage(C.GREEN + "Paused/unpaused pregeneration task, now: " + (PregeneratorJob.isPaused() ? "Paused" : "Running") + ".");
+        } else {
+            sender().sendMessage(C.YELLOW + "No active pregeneration tasks to pause/unpause.");
+        }
+    }
+
+    @Director(description = "Show the active pregeneration status")
+    public void status() {
+        PregeneratorJob.PregenProgress progress = PregeneratorJob.progressSnapshot();
+        if (progress == null) {
+            sender().sendMessage(C.YELLOW + "No active pregeneration task.");
+            return;
+        }
+
+        String world = progress.worldName() == null ? "?" : progress.worldName();
+        sender().sendMessage(C.GREEN + "Pregen " + C.GOLD + world + C.GREEN + ": " + C.GOLD + Form.f(progress.generated()) + "/" + Form.f(progress.totalChunks())
+                + C.GREEN + " (" + C.GOLD + String.format("%.1f", progress.percent()) + "%" + C.GREEN + ")"
+                + (progress.paused() ? C.YELLOW + " PAUSED" : ""));
+        sender().sendMessage(C.GREEN + "Speed: " + C.GOLD + Form.f((int) progress.chunksPerSecond()) + "/s" + C.GREEN
+                + " ETA: " + C.GOLD + Form.duration(progress.eta(), 2) + C.GREEN
+                + " Elapsed: " + C.GOLD + Form.duration(progress.elapsed(), 2) + C.GREEN
+                + " Method: " + C.GOLD + progress.method()
+                + (progress.failed() > 0 ? C.RED + " Failed: " + Form.f(progress.failed()) : ""));
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandStructure.java

@@ -0,0 +1,284 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.core.loader.IrisData;
+import art.arcane.iris.core.structure.BulkStructureImporter;
+import art.arcane.iris.core.structure.StructureCaptureImporter;
+import art.arcane.iris.core.structure.StructureImporter;
+import art.arcane.iris.core.structure.StructureIndexService;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.framework.IrisStructureLocator;
+import art.arcane.iris.engine.framework.PlacedStructurePiece;
+import art.arcane.iris.engine.framework.StructureAssembler;
+import art.arcane.iris.engine.framework.StructureReachability;
+import art.arcane.iris.engine.object.IObjectPlacer;
+import art.arcane.iris.engine.object.IrisDimension;
+import art.arcane.iris.engine.object.IrisObjectPlacement;
+import art.arcane.iris.engine.object.IrisStructure;
+import art.arcane.iris.engine.object.ObjectPlaceMode;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
+import art.arcane.volmlib.util.math.RNG;
+import io.papermc.paper.registry.RegistryAccess;
+import io.papermc.paper.registry.RegistryKey;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.generator.structure.Structure;
+import org.bukkit.util.StructureSearchResult;
+
+import java.io.File;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+@Director(name = "structure", aliases = {"struct", "str"}, description = "Iris structure tools (index, import, info)")
+public class CommandStructure implements DirectorExecutor {
+    @Director(description = "Regenerate structure-index.json listing all vanilla, datapack & iris structures", aliases = {"ls"}, origin = DirectorOrigin.BOTH)
+    public void list(
+            @Param(description = "The dimension whose pack to index", aliases = "dim")
+            IrisDimension dimension
+    ) {
+        IrisData data = dimension.getLoader();
+        if (data == null) {
+            sender().sendMessage(C.RED + "Could not resolve the pack for dimension " + dimension.getLoadKey());
+            return;
+        }
+        File file = StructureIndexService.write(data);
+        sender().sendMessage(C.GREEN + "Wrote structure index: " + C.WHITE + file.getPath());
+    }
+
+    @Director(name = "import", description = "Import EVERY structure - vanilla AND ingested datapacks - into this pack as editable Iris resources, always overwriting. Rebuilds jigsaw structures (villages, outposts, datapack jigsaws) as editable pool/piece graphs, imports every structure template NBT as an object, and assembles the multi-template structures (shipwrecks, ruined portals, ocean ruins, nether fossils). Run after ingesting a datapack and restarting. Regenerate chunks or use a fresh world for the imported copies to place.", aliases = {"import-all", "reimport", "imp", "all"}, origin = DirectorOrigin.BOTH)
+    public void importAll(
+            @Param(description = "The dimension whose pack to import into", aliases = "dim")
+            IrisDimension dimension
+    ) {
+        IrisData data = dimension.getLoader();
+        if (data == null) {
+            sender().sendMessage(C.RED + "Could not resolve the pack for dimension " + dimension.getLoadKey());
+            return;
+        }
+        sender().sendMessage(C.GREEN + "Importing all vanilla & datapack structures into " + C.WHITE + dimension.getLoadKey() + C.GREEN + " (overwrite)...");
+        BulkStructureImporter.Report jigsaws = BulkStructureImporter.importAllVanilla(data, StructureImporter.Mode.OVERWRITE, true, sender());
+        BulkStructureImporter.Report templates = BulkStructureImporter.importAllTemplates(data, StructureImporter.Mode.OVERWRITE, sender());
+        BulkStructureImporter.Report groups = BulkStructureImporter.importTemplateGroups(data, StructureImporter.Mode.OVERWRITE, sender());
+        StructureCaptureImporter.Report captured = StructureCaptureImporter.importAllStructures(data, StructureImporter.Mode.OVERWRITE, sender());
+        int imported = jigsaws.imported() + templates.imported() + groups.imported() + captured.imported();
+        int failed = jigsaws.failed() + templates.failed() + groups.failed() + captured.failed();
+        sender().sendMessage(C.GREEN + "Import complete: " + C.WHITE + imported + C.GREEN + " structures/objects written, " + C.WHITE + failed + C.GREEN + " failed.");
+        sender().sendMessage(C.GRAY + "Reference them from a biome/region/dimension 'structures' list, or run /iris structure list " + dimension.getLoadKey() + " to refresh the index. Regenerate chunks for changes to take effect.");
+    }
+
+    @Director(name = "capture", description = "Capture code-generated structures that have no NBT template (swamp huts, igloos, etc.) into editable Iris objects by generating each one in a throwaway scratch world and reading back its blocks. Skips structures that already import as a structure, structures wider/taller than the capture cap (strongholds, mansions, monuments stay vanilla), and anything that will not generate in a flat overworld. Each captured structure becomes a single-piece Iris structure you can place from a biome/region/dimension 'structures' list. Runs automatically as the last pass of /iris structure import.", aliases = {"cap"}, origin = DirectorOrigin.BOTH)
+    public void capture(
+            @Param(description = "The dimension whose pack to capture into", aliases = "dim")
+            IrisDimension dimension
+    ) {
+        IrisData data = dimension.getLoader();
+        if (data == null) {
+            sender().sendMessage(C.RED + "Could not resolve the pack for dimension " + dimension.getLoadKey());
+            return;
+        }
+        StructureCaptureImporter.Report report = StructureCaptureImporter.importAllStructures(data, StructureImporter.Mode.OVERWRITE, sender());
+        sender().sendMessage(C.GRAY + "Captured " + report.imported() + " structures. Place them from a 'structures' list and regenerate chunks. Delete a structures/*.json to re-capture it.");
+    }
+
+    @Director(description = "Locate every vanilla/datapack/iris structure to verify which are locatable in this world. Heavy synchronous search per structure - keep the radius modest. 'Not found' can mean rarer than the radius, a different dimension (nether/end structures never appear in the overworld), or a structure that generates but cannot be located; generation itself happens during chunk decoration, independent of locate.", aliases = {"locateall"}, origin = DirectorOrigin.BOTH, sync = true)
+    public void verify(
+            @Param(description = "The dimension to verify", aliases = "dim")
+            IrisDimension dimension,
+            @Param(description = "Search radius in chunks around the origin (larger is much slower)", defaultValue = "48")
+            int radius
+    ) {
+        World world = resolveIrisWorld(dimension);
+        if (world == null) {
+            sender().sendMessage(C.RED + "No loaded Iris world found for " + dimension.getLoadKey() + ". Join or create one first (the search runs against a live world).");
+            return;
+        }
+        boolean senderIsPlayer = sender() != null && sender().isPlayer();
+        Location center = (senderIsPlayer && player().getWorld() == world) ? player().getLocation() : world.getSpawnLocation();
+        int searchRadius = Math.max(1, Math.min(radius, 1000));
+
+        sender().sendMessage(C.GREEN + "Verifying structures in " + C.WHITE + world.getName() + C.GREEN + " from " + center.getBlockX() + "," + center.getBlockZ() + " within " + searchRadius + " chunks...");
+
+        Engine engine = null;
+        PlatformChunkGenerator access = IrisToolbelt.access(world);
+        if (access != null) {
+            engine = access.getEngine();
+        }
+        Set<String> reachable = engine == null ? Collections.emptySet() : StructureReachability.reachableKeys(engine);
+
+        int found = 0;
+        int missing = 0;
+        int unreachable = 0;
+        int irisPlaced = 0;
+        KList<String> notFound = new KList<>();
+        KList<String> cannotGenerate = new KList<>();
+        Registry<Structure> structureRegistry = RegistryAccess.registryAccess().getRegistry(RegistryKey.STRUCTURE);
+        for (Structure structure : structureRegistry) {
+            NamespacedKey key = structureRegistry.getKey(structure);
+            String keyName = key == null ? structure.toString() : key.toString();
+            boolean isIrisPlaced = engine != null && IrisStructureLocator.suppressesVanilla(engine, keyName);
+            boolean isReachable = engine != null && reachable.contains(keyName.toLowerCase());
+            if (engine != null && !isIrisPlaced && !isReachable) {
+                unreachable++;
+                KList<String> miss = StructureReachability.missingBiomeKeys(engine, keyName);
+                cannotGenerate.add(keyName + (miss.isEmpty() ? "" : " (needs " + String.join("/", miss) + ")"));
+                continue;
+            }
+            if (isIrisPlaced) {
+                irisPlaced++;
+            }
+            try {
+                StructureSearchResult result = world.locateNearestStructure(center, structure, searchRadius, true);
+                if (result != null && result.getLocation() != null) {
+                    found++;
+                    Location l = result.getLocation();
+                    sender().sendMessage((isIrisPlaced ? C.AQUA + "[iris] " : C.GREEN + "[ok] ") + C.WHITE + keyName + C.GREEN + " @ " + l.getBlockX() + "," + l.getBlockZ());
+                } else {
+                    missing++;
+                    notFound.add(keyName);
+                }
+            } catch (Throwable e) {
+                missing++;
+                notFound.add(keyName + " (error: " + e.getClass().getSimpleName() + ")");
+            }
+        }
+
+        sender().sendMessage(C.GREEN + "Structure verify: " + C.WHITE + found + C.GREEN + " located (" + irisPlaced + " iris-placed), "
+                + C.WHITE + unreachable + C.GREEN + " cannot generate here, "
+                + C.WHITE + missing + C.GREEN + " reachable-but-not-found within " + searchRadius + " chunks.");
+        if (!cannotGenerate.isEmpty()) {
+            sender().sendMessage(C.RED + "Cannot generate (required biomes absent from this pack): " + C.GRAY + String.join(", ", cannotGenerate));
+        }
+        if (!notFound.isEmpty()) {
+            sender().sendMessage(C.YELLOW + "Reachable but not found (rarer than radius): " + C.GRAY + String.join(", ", notFound));
+        }
+    }
+
+    private World resolveIrisWorld(IrisDimension dimension) {
+        if (sender() != null && sender().isPlayer() && IrisToolbelt.isIrisWorld(player().getWorld())) {
+            return player().getWorld();
+        }
+        World fallback = null;
+        for (World w : Bukkit.getWorlds()) {
+            if (!IrisToolbelt.isIrisWorld(w)) {
+                continue;
+            }
+            if (fallback == null) {
+                fallback = w;
+            }
+            PlatformChunkGenerator gen = IrisToolbelt.access(w);
+            if (gen != null && gen.getEngine() != null && gen.getEngine().getDimension() != null
+                    && dimension.getLoadKey().equals(gen.getEngine().getDimension().getLoadKey())) {
+                return w;
+            }
+        }
+        return fallback;
+    }
+
+    @Director(description = "Resolve an iris structure's jigsaw graph and report piece count & bounds", origin = DirectorOrigin.BOTH)
+    public void info(
+            @Param(description = "The dimension whose pack holds the structure", aliases = "dim")
+            IrisDimension dimension,
+            @Param(description = "The iris structure key to inspect")
+            String structure
+    ) {
+        IrisData data = dimension.getLoader();
+        if (data == null) {
+            sender().sendMessage(C.RED + "Could not resolve the pack for dimension " + dimension.getLoadKey());
+            return;
+        }
+        IrisStructure s = IrisData.loadAnyStructure(structure, data);
+        if (s == null) {
+            sender().sendMessage(C.RED + "No iris structure '" + structure + "' in this pack");
+            return;
+        }
+        StructureAssembler assembler = new StructureAssembler(data, s, 0, 64, 0);
+        KList<PlacedStructurePiece> pieces = assembler.assemble(new RNG(1234));
+        if (pieces == null || pieces.isEmpty()) {
+            sender().sendMessage(C.RED + "Structure '" + structure + "' assembled 0 pieces (check startPool '" + s.getStartPool() + "')");
+            return;
+        }
+        int minX = Integer.MAX_VALUE;
+        int minZ = Integer.MAX_VALUE;
+        int maxX = Integer.MIN_VALUE;
+        int maxZ = Integer.MIN_VALUE;
+        for (PlacedStructurePiece p : pieces) {
+            minX = Math.min(minX, p.getMinX());
+            minZ = Math.min(minZ, p.getMinZ());
+            maxX = Math.max(maxX, p.getMaxX());
+            maxZ = Math.max(maxZ, p.getMaxZ());
+        }
+        sender().sendMessage(C.GREEN + "Structure '" + structure + "': " + C.WHITE + pieces.size() + C.GREEN + " pieces, footprint " + C.WHITE + (maxX - minX + 1) + "x" + (maxZ - minZ + 1) + C.GREEN + " blocks (sample seed 1234)");
+    }
+
+    @Director(description = "Assemble and place an iris structure at your location (studio testing)", aliases = {"p"}, origin = DirectorOrigin.PLAYER, sync = true)
+    public void place(
+            @Param(description = "The dimension whose pack holds the structure", aliases = "dim")
+            IrisDimension dimension,
+            @Param(description = "The iris structure key to place")
+            String structure
+    ) {
+        IrisData data = dimension.getLoader();
+        if (data == null) {
+            sender().sendMessage(C.RED + "Could not resolve the pack for dimension " + dimension.getLoadKey());
+            return;
+        }
+        IrisStructure s = IrisData.loadAnyStructure(structure, data);
+        if (s == null) {
+            sender().sendMessage(C.RED + "No iris structure '" + structure + "' in this pack");
+            return;
+        }
+        Location loc = player().getLocation();
+        StructureAssembler assembler = new StructureAssembler(data, s, loc.getBlockX(), loc.getBlockY(), loc.getBlockZ());
+        RNG rng = new RNG((long) loc.getBlockX() * 341873128712L + loc.getBlockZ());
+        KList<PlacedStructurePiece> pieces = assembler.assemble(rng);
+        if (pieces == null || pieces.isEmpty()) {
+            sender().sendMessage(C.RED + "Structure '" + structure + "' assembled 0 pieces");
+            return;
+        }
+        Map<Block, BlockData> future = new HashMap<>();
+        IObjectPlacer placer = CommandObject.createPlacer(player().getWorld(), future);
+        for (PlacedStructurePiece p : pieces) {
+            IrisObjectPlacement config = new IrisObjectPlacement();
+            config.setMode(ObjectPlaceMode.STRUCTURE_PIECE);
+            config.setRotation(p.getRotation());
+            config.getPlace().add(p.getObject().getLoadKey());
+            if (!s.getEdit().isEmpty()) {
+                config.setEdit(s.getEdit());
+            }
+            p.getObject().place(p.getX(), p.getY(), p.getZ(), placer, config, rng, null, null, data);
+        }
+        sender().sendMessage(C.GREEN + "Placed '" + structure + "' (" + pieces.size() + " pieces) at your location.");
+    }
+
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandStudio.java

@@ -0,0 +1,880 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.platform.bukkit.BukkitPlatform;
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.iris.core.gui.NoiseExplorerGUI;
+import art.arcane.iris.core.gui.VisionGUI;
+import art.arcane.iris.core.loader.IrisData;
+import art.arcane.iris.core.project.IrisProject;
+import art.arcane.iris.core.service.StudioSVC;
+import art.arcane.iris.core.structure.BulkStructureImporter;
+import art.arcane.iris.core.structure.FeatureImporter;
+import art.arcane.iris.core.structure.StructureImporter;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.InventorySlotType;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisBiomePaletteLayer;
+import art.arcane.iris.engine.object.IrisDimension;
+import art.arcane.iris.engine.object.IrisEntity;
+import art.arcane.iris.engine.object.IrisGenerator;
+import art.arcane.iris.engine.object.IrisInterpolator;
+import art.arcane.iris.engine.object.IrisLootTable;
+import art.arcane.iris.engine.object.IrisNoiseGenerator;
+import art.arcane.iris.engine.object.IrisObject;
+import art.arcane.iris.engine.object.IrisObjectPlacement;
+import art.arcane.iris.engine.object.IrisRegion;
+import art.arcane.iris.engine.object.NoiseStyle;
+import art.arcane.iris.engine.platform.EngineBukkitOps;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.volmlib.util.collection.KMap;
+import art.arcane.volmlib.util.collection.KSet;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.iris.util.common.director.handlers.DimensionHandler;
+import art.arcane.iris.util.common.director.specialhandlers.NullableDimensionHandler;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.format.Form;
+import art.arcane.volmlib.util.function.Function2;
+import art.arcane.volmlib.util.function.NoiseProvider;
+import art.arcane.iris.util.project.interpolation.InterpolationMethod;
+import art.arcane.volmlib.util.io.IO;
+import art.arcane.volmlib.util.json.JSONArray;
+import art.arcane.volmlib.util.json.JSONObject;
+import art.arcane.volmlib.util.math.M;
+import art.arcane.volmlib.util.math.RNG;
+import art.arcane.volmlib.util.math.Spiraler;
+import art.arcane.iris.util.project.noise.CNG;
+import art.arcane.iris.util.common.parallel.MultiBurst;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.scheduling.O;
+import art.arcane.volmlib.util.scheduling.PrecisionStopwatch;
+import org.bukkit.Bukkit;
+import org.bukkit.Chunk;
+import org.bukkit.FluidCollisionMode;
+import org.bukkit.GameMode;
+import org.bukkit.Location;
+import org.bukkit.World;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryType;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.util.Vector;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.nio.file.Files;
+import java.nio.file.attribute.FileTime;
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
+import java.util.Date;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Supplier;
+
+@Director(name = "studio", aliases = {"std", "s"}, description = "Studio Commands")
+public class CommandStudio implements DirectorExecutor {
+    private CommandEdit edit;
+    //private CommandDeepSearch deepSearch;
+
+    public static String hrf(Duration duration) {
+        return duration.toString().substring(2).replaceAll("(\\d[HMS])(?!$)", "$1 ").toLowerCase();
+    }
+
+    @Director(description = "Open a new studio world", aliases = "o", sync = true)
+    public void open(
+            @Param(description = "The dimension pack to open a studio for", aliases = "dim", customHandler = DimensionHandler.class)
+            IrisDimension dimension,
+            @Param(defaultValue = "1337", description = "The seed to generate the studio with", aliases = "s")
+            long seed) {
+        sender().sendMessage(C.GREEN + "Opening studio for the \"" + dimension.getName() + "\" pack (seed: " + seed + ")");
+        Iris.service(StudioSVC.class).open(sender(), seed, dimension.getLoadKey());
+    }
+
+    @Director(description = "Import vanilla trees, mushrooms & objects (and structures/jigsaw) from the server into a pack's objects/vanilla folder", aliases = {"importv", "iv"}, origin = DirectorOrigin.BOTH)
+    public void importvanilla(
+            @Param(description = "The dimension pack to import vanilla content into", aliases = {"pack", "dim"}, customHandler = DimensionHandler.class)
+            IrisDimension dimension,
+            @Param(description = "How many variants to capture per tree/object feature", defaultValue = "3")
+            int variants,
+            @Param(description = "Also import vanilla & datapack structures/jigsaw into the pack", defaultValue = "true")
+            boolean structures
+    ) {
+        if (dimension == null) {
+            sender().sendMessage(C.RED + "Provide a dimension pack: /iris std importvanilla pack=<dimension>");
+            return;
+        }
+        IrisData data = dimension.getLoader();
+        if (data == null) {
+            sender().sendMessage(C.RED + "Could not resolve the pack for dimension " + dimension.getLoadKey());
+            return;
+        }
+
+        VolmitSender sender = sender();
+        sender.sendMessage(C.GREEN + "Importing vanilla content into " + C.WHITE + dimension.getLoadKey() + C.GREEN + "...");
+
+        FeatureImporter.Report features = FeatureImporter.importAllObjectFeatures(data, variants, sender);
+        int imported = features.imported();
+        int failed = features.failed();
+
+        if (structures) {
+            BulkStructureImporter.Report jigsaws = BulkStructureImporter.importAllVanilla(data, StructureImporter.Mode.OVERWRITE, true, sender);
+            BulkStructureImporter.Report templates = BulkStructureImporter.importAllTemplates(data, StructureImporter.Mode.OVERWRITE, sender);
+            BulkStructureImporter.Report groups = BulkStructureImporter.importTemplateGroups(data, StructureImporter.Mode.OVERWRITE, sender);
+            imported += jigsaws.imported() + templates.imported() + groups.imported();
+            failed += jigsaws.failed() + templates.failed() + groups.failed();
+        }
+
+        sender.sendMessage(C.GREEN + "importvanilla complete: " + C.WHITE + imported + C.GREEN + " objects/structures written, " + C.WHITE + failed + C.GREEN + " failed.");
+        sender.sendMessage(C.GRAY + "Trees/objects are under objects/vanilla/...; reference them from biome object placements.");
+    }
+
+    @Director(description = "Open VSCode for a dimension", aliases = {"vsc"})
+    public void vscode(
+            @Param(defaultValue = "default", description = "The dimension to open VSCode for", aliases = "dim", customHandler = DimensionHandler.class)
+            IrisDimension dimension
+    ) {
+        sender().sendMessage(C.GREEN + "Opening VSCode for the \"" + dimension.getName() + "\" pack");
+        Iris.service(StudioSVC.class).openVSCode(sender(), dimension.getLoadKey());
+    }
+
+    @Director(description = "Close an open studio project", aliases = {"x"}, sync = true)
+    public void close() {
+        VolmitSender commandSender = sender();
+        if (!Iris.service(StudioSVC.class).isProjectOpen()) {
+            commandSender.sendMessage(C.RED + "No open studio projects.");
+            return;
+        }
+
+        commandSender.sendMessage(C.YELLOW + "Closing studio...");
+        Iris.service(StudioSVC.class).close().whenComplete((result, throwable) -> J.s(() -> {
+            if (throwable != null) {
+                commandSender.sendMessage(C.RED + "Studio close failed: " + throwable.getMessage());
+                return;
+            }
+
+            if (result != null && result.failureCause() != null) {
+                commandSender.sendMessage(C.RED + "Studio close failed: " + result.failureCause().getMessage());
+                return;
+            }
+
+            if (result != null && result.startupCleanupQueued()) {
+                commandSender.sendMessage(C.YELLOW + "Studio closed. Remaining world-family cleanup was queued for startup fallback.");
+                return;
+            }
+
+            commandSender.sendMessage(C.GREEN + "Studio closed.");
+        }));
+    }
+
+    @Director(description = "Create a new studio project", aliases = "+", sync = true)
+    public void create(
+            @Param(description = "The name of this new Iris Project.", defaultValue = "studio")
+            String name,
+            @Param(
+                    description = "Copy the contents of an existing project in your packs folder and use it as a template in this new project.",
+                    contextual = true,
+                    customHandler = NullableDimensionHandler.class
+            )
+            IrisDimension template) {
+        String projectName = name;
+        if (name.equals("studio")) {
+            File workspace = Iris.service(StudioSVC.class).getWorkspaceFolder();
+            int suffix = 2;
+            while (new File(workspace, projectName).exists()) {
+                projectName = "studio" + suffix++;
+            }
+        }
+
+        if (template != null) {
+            Iris.service(StudioSVC.class).create(sender(), projectName, template.getLoadKey());
+        } else {
+            Iris.service(StudioSVC.class).create(sender(), projectName);
+        }
+    }
+
+    @Director(description = "Get the version of a pack")
+    public void version(
+            @Param(defaultValue = "default", description = "The dimension get the version of", aliases = "dim", contextual = true, customHandler = DimensionHandler.class)
+            IrisDimension dimension
+    ) {
+        sender().sendMessage(C.GREEN + "The \"" + dimension.getName() + "\" pack has version: " + dimension.getVersion());
+    }
+
+    @Director(description = "Open the noise explorer (External GUI)", aliases = {"nmap"})
+    public void noise(
+            @Param(description = "Optional pack generator to preview", defaultValue = "null", contextual = true)
+            IrisGenerator generator,
+            @Param(description = "The seed to preview the generator with", defaultValue = "12345")
+            long seed
+    ) {
+        if (noGUI()) return;
+        sender().sendMessage(C.GREEN + "Opening Noise Explorer!");
+
+        if (generator == null) {
+            NoiseExplorerGUI.launch();
+            return;
+        }
+
+        Supplier<Function2<Double, Double, Double>> supplier = () -> (x, z) -> generator.getHeight(x, z, new RNG(seed).nextParallelRNG(3245).lmax());
+        NoiseExplorerGUI.launch(supplier, "Custom Generator");
+    }
+
+    @Director(description = "Show loot if a chest were right here", origin = DirectorOrigin.PLAYER, sync = true)
+    public void loot(
+            @Param(description = "Fast insertion of items in virtual inventory (may cause performance drop)", defaultValue = "false")
+            boolean fast,
+            @Param(description = "Whether or not to append to the inventory currently open (if false, clears opened inventory)", defaultValue = "true")
+            boolean add
+    ) {
+        if (noStudio()) return;
+
+        KList<IrisLootTable> tables = EngineBukkitOps.getLootTables(engine(), RNG.r, player().getLocation().getBlock());
+        Inventory inv = Bukkit.createInventory(null, 27 * 2);
+
+        try {
+            EngineBukkitOps.addItems(engine(), true, inv, RNG.r, tables, InventorySlotType.STORAGE, player().getWorld(), player().getLocation().getBlockX(), player().getLocation().getBlockY(), player().getLocation().getBlockZ(), 1);
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            sender().sendMessage(C.RED + "Cannot add items to virtual inventory because of: " + e.getMessage());
+            return;
+        }
+
+
+        O<Integer> ta = new O<>();
+        ta.set(-1);
+
+        var sender = sender();
+        var player = player();
+        var engine = engine();
+
+        ta.set(J.sr(() ->
+        {
+            if (!player.getOpenInventory().getType().equals(InventoryType.CHEST)) {
+                J.csr(ta.get());
+                sender.sendMessage(C.GREEN + "Opened inventory!");
+                return;
+            }
+
+            if (!add) {
+                inv.clear();
+            }
+
+            EngineBukkitOps.addItems(engine, true, inv, new RNG(RNG.r.imax()), tables, InventorySlotType.STORAGE, player.getWorld(), player.getLocation().getBlockX(), player.getLocation().getBlockY(), player.getLocation().getBlockZ(), 1);
+        }, fast ? 5 : 35));
+
+        sender().sendMessage(C.GREEN + "Opening inventory now!");
+        player().openInventory(inv);
+    }
+
+    @Director(description = "Calculate the chance for each region to generate", origin = DirectorOrigin.PLAYER)
+    public void regions(@Param(description = "The radius in chunks", defaultValue = "500") int radius) {
+        var engine = engine();
+        if (engine == null) {
+            sender().sendMessage(C.RED + "Only works in an Iris world!");
+            return;
+        }
+        var sender = sender();
+        var player = player();
+        Thread.ofVirtual()
+                .start(() -> {
+                    int d = radius * 2;
+                    KMap<String, AtomicInteger> data = new KMap<>();
+                    engine.getDimension().getRegions().forEach(key -> data.put(key, new AtomicInteger(0)));
+                    var multiBurst = new MultiBurst("Region Sampler");
+                    var executor = multiBurst.burst(radius * radius);
+                    sender.sendMessage(C.GRAY + "Generating data...");
+                    var loc = player.getLocation();
+                    int totalTasks = d * d;
+                    AtomicInteger completedTasks = new AtomicInteger(0);
+                    int c = J.ar(() -> sender.sendProgress((double) completedTasks.get() / totalTasks, "Finding regions"), 0);
+                    new Spiraler(d, d, (x, z) -> executor.queue(() -> {
+                        var region = engine.getRegion((x << 4) + 8, (z << 4) + 8);
+                        data.computeIfAbsent(region.getLoadKey(), (k) -> new AtomicInteger(0))
+                                .incrementAndGet();
+                        completedTasks.incrementAndGet();
+                    })).setOffset(loc.getBlockX(), loc.getBlockZ()).drain();
+                    executor.complete();
+                    multiBurst.close();
+                    J.car(c);
+
+                    sender.sendMessage(C.GREEN + "Done!");
+                    var loader = engine.getData().getRegionLoader();
+                    data.forEach((k, v) -> sender.sendMessage(C.GREEN + k + ": " + loader.load(k).getRarity() + " / " + Form.f((double) v.get() / totalTasks * 100, 2) + "%"));
+                });
+    }
+
+    @Director(description = "Render a world map (External GUI)", aliases = "render")
+    public void map(
+            @Param(name = "world", description = "The world to open the generator for", contextual = true)
+            World world
+    ) {
+        if (noGUI()) return;
+
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage(C.RED + "You need to be in or specify an Iris-generated world!");
+            return;
+        }
+
+        VisionGUI.launch(IrisToolbelt.access(world).getEngine());
+        sender().sendMessage(C.GREEN + "Opening map!");
+    }
+
+    @Director(description = "Package a dimension into a compressed format", aliases = "package")
+    public void pkg(
+            @Param(name = "dimension", description = "The dimension pack to compress", contextual = true, defaultValue = "default", customHandler = DimensionHandler.class)
+            IrisDimension dimension,
+            @Param(name = "obfuscate", description = "Whether or not to obfuscate the pack", defaultValue = "false")
+            boolean obfuscate,
+            @Param(name = "minify", description = "Whether or not to minify the pack", defaultValue = "true")
+            boolean minify
+    ) {
+        Iris.service(StudioSVC.class).compilePackage(sender(), dimension.getLoadKey(), obfuscate, minify);
+    }
+
+    @Director(description = "Profiles the performance of a dimension", origin = DirectorOrigin.PLAYER)
+    public void profile(
+            @Param(description = "The dimension to profile", contextual = true, defaultValue = "default", customHandler = DimensionHandler.class)
+            IrisDimension dimension
+    ) {
+        // Todo: Make this more accurate
+        File pack = dimension.getLoadFile().getParentFile().getParentFile();
+        File report = Iris.instance.getDataFile("profile.txt");
+        IrisProject project = new IrisProject(pack);
+        IrisData data = IrisData.get(pack);
+        PlatformChunkGenerator activeGenerator = resolveProfileGenerator(dimension);
+        Engine activeEngine = activeGenerator == null ? null : activeGenerator.getEngine();
+
+        if (activeEngine != null) {
+            IrisToolbelt.applyPregenPerformanceProfile(activeEngine);
+        } else {
+            IrisToolbelt.applyPregenPerformanceProfile();
+        }
+
+        KList<String> fileText = new KList<>();
+
+        KMap<NoiseStyle, Double> styleTimings = new KMap<>();
+        KMap<InterpolationMethod, Double> interpolatorTimings = new KMap<>();
+        KMap<String, Double> generatorTimings = new KMap<>();
+        KMap<String, Double> biomeTimings = new KMap<>();
+        KMap<String, Double> regionTimings = new KMap<>();
+
+        sender().sendMessage("Calculating Performance Metrics for Noise generators");
+
+        for (NoiseStyle i : NoiseStyle.values()) {
+            CNG c = i.create(new RNG(i.hashCode()));
+
+            for (int j = 0; j < 3000; j++) {
+                c.noise(j, j + 1000, j * j);
+                c.noise(j, -j);
+            }
+
+            PrecisionStopwatch px = PrecisionStopwatch.start();
+
+            for (int j = 0; j < 100000; j++) {
+                c.noise(j, j + 1000, j * j);
+                c.noise(j, -j);
+            }
+
+            styleTimings.put(i, px.getMilliseconds());
+        }
+
+        fileText.add("Noise Style Performance Impacts: ");
+
+        for (NoiseStyle i : styleTimings.sortKNumber()) {
+            fileText.add(i.name() + ": " + styleTimings.get(i));
+        }
+
+        fileText.add("");
+
+        sender().sendMessage("Calculating Interpolator Timings...");
+
+        for (InterpolationMethod i : InterpolationMethod.values()) {
+            IrisInterpolator in = new IrisInterpolator();
+            in.setFunction(i);
+            in.setHorizontalScale(8);
+
+            NoiseProvider np = (x, z) -> Math.random();
+
+            for (int j = 0; j < 3000; j++) {
+                in.interpolate(j, -j, np);
+            }
+
+            PrecisionStopwatch px = PrecisionStopwatch.start();
+
+            for (int j = 0; j < 100000; j++) {
+                in.interpolate(j + 10000, -j - 100000, np);
+            }
+
+            interpolatorTimings.put(i, px.getMilliseconds());
+        }
+
+        fileText.add("Noise Interpolator Performance Impacts: ");
+
+        for (InterpolationMethod i : interpolatorTimings.sortKNumber()) {
+            fileText.add(i.name() + ": " + interpolatorTimings.get(i));
+        }
+
+        fileText.add("");
+
+        sender().sendMessage("Processing Generator Scores: ");
+
+        KMap<String, KList<String>> btx = new KMap<>();
+
+        for (String i : data.getGeneratorLoader().getPossibleKeys()) {
+            KList<String> vv = new KList<>();
+            IrisGenerator g = data.getGeneratorLoader().load(i);
+            KList<IrisNoiseGenerator> composites = g.getAllComposites();
+            double score = 0;
+            int m = 0;
+            for (IrisNoiseGenerator j : composites) {
+                m++;
+                score += styleTimings.get(j.getStyle().getStyle());
+                vv.add("Composite Noise Style " + m + " " + j.getStyle().getStyle().name() + ": " + styleTimings.get(j.getStyle().getStyle()));
+            }
+
+            score += interpolatorTimings.get(g.getInterpolator().getFunction());
+            vv.add("Interpolator " + g.getInterpolator().getFunction().name() + ": " + interpolatorTimings.get(g.getInterpolator().getFunction()));
+            generatorTimings.put(i, score);
+            btx.put(i, vv);
+        }
+
+        fileText.add("Project Generator Performance Impacts: ");
+
+        for (String i : generatorTimings.sortKNumber()) {
+            fileText.add(i + ": " + generatorTimings.get(i));
+
+            btx.get(i).forEach((ii) -> fileText.add("  " + ii));
+        }
+
+        fileText.add("");
+
+        KMap<String, KList<String>> bt = new KMap<>();
+
+        for (String i : data.getBiomeLoader().getPossibleKeys()) {
+            KList<String> vv = new KList<>();
+            IrisBiome b = data.getBiomeLoader().load(i);
+            double score = 0;
+
+            int m = 0;
+            for (IrisBiomePaletteLayer j : b.getLayers()) {
+                m++;
+                score += styleTimings.get(j.getStyle().getStyle());
+                vv.add("Palette Layer " + m + ": " + styleTimings.get(j.getStyle().getStyle()));
+            }
+
+            score += styleTimings.get(b.getBiomeStyle().getStyle());
+            vv.add("Biome Style: " + styleTimings.get(b.getBiomeStyle().getStyle()));
+            score += styleTimings.get(b.getChildStyle().getStyle());
+            vv.add("Child Style: " + styleTimings.get(b.getChildStyle().getStyle()));
+            biomeTimings.put(i, score);
+            bt.put(i, vv);
+        }
+
+        fileText.add("Project Biome Performance Impacts: ");
+
+        for (String i : biomeTimings.sortKNumber()) {
+            fileText.add(i + ": " + biomeTimings.get(i));
+
+            bt.get(i).forEach((ff) -> fileText.add("  " + ff));
+        }
+
+        fileText.add("");
+
+        for (String i : data.getRegionLoader().getPossibleKeys()) {
+            IrisRegion b = data.getRegionLoader().load(i);
+            double score = 0;
+
+            score += styleTimings.get(b.getLakeStyle().getStyle());
+            score += styleTimings.get(b.getRiverStyle().getStyle());
+            regionTimings.put(i, score);
+        }
+
+        fileText.add("Project Region Performance Impacts: ");
+
+        for (String i : regionTimings.sortKNumber()) {
+            fileText.add(i + ": " + regionTimings.get(i));
+        }
+
+        fileText.add("");
+
+        double m = 0;
+        for (double i : biomeTimings.v()) {
+            m += i;
+        }
+        m /= biomeTimings.size();
+        double mm = 0;
+        for (double i : generatorTimings.v()) {
+            mm += i;
+        }
+        mm /= generatorTimings.size();
+        m += mm;
+        double mmm = 0;
+        for (double i : regionTimings.v()) {
+            mmm += i;
+        }
+        mmm /= regionTimings.size();
+        m += mmm;
+
+        fileText.add("Average Score: " + m);
+        sender().sendMessage("Score: " + Form.duration(m, 0));
+
+        try {
+            IO.writeAll(report, fileText.toString("\n"));
+        } catch (IOException e) {
+            Iris.reportError(e);
+            e.printStackTrace();
+        }
+
+        sender().sendMessage(C.GREEN + "Done! " + report.getPath());
+    }
+
+    private PlatformChunkGenerator resolveProfileGenerator(IrisDimension dimension) {
+        StudioSVC studioService = Iris.service(StudioSVC.class);
+        if (studioService != null && studioService.isProjectOpen()) {
+            IrisProject activeProject = studioService.getActiveProject();
+            if (activeProject != null) {
+                PlatformChunkGenerator activeProvider = activeProject.getActiveProvider();
+                if (isGeneratorDimension(activeProvider, dimension)) {
+                    return activeProvider;
+                }
+            }
+        }
+
+        if (!sender().isPlayer()) {
+            return null;
+        }
+
+        Player player = sender().player();
+        if (player == null) {
+            return null;
+        }
+
+        PlatformChunkGenerator worldAccess = IrisToolbelt.access(player.getWorld());
+        if (isGeneratorDimension(worldAccess, dimension)) {
+            return worldAccess;
+        }
+
+        return null;
+    }
+
+    private boolean isGeneratorDimension(PlatformChunkGenerator generator, IrisDimension dimension) {
+        if (generator == null || generator.getEngine() == null || dimension == null || dimension.getLoadKey() == null) {
+            return false;
+        }
+
+        IrisDimension engineDimension = generator.getEngine().getDimension();
+        if (engineDimension == null || engineDimension.getLoadKey() == null) {
+            return false;
+        }
+
+        return engineDimension.getLoadKey().equalsIgnoreCase(dimension.getLoadKey());
+    }
+
+    @Director(description = "Spawn an Iris entity", aliases = "summon", origin = DirectorOrigin.PLAYER)
+    public void spawn(
+            @Param(description = "The entity to spawn")
+            IrisEntity entity,
+            @Param(description = "The location to spawn the entity at", contextual = true)
+            Vector location
+    ) {
+        if (!IrisToolbelt.isIrisWorld(player().getWorld())) {
+            sender().sendMessage(C.RED + "You have to be in an Iris world to spawn entities properly. Trying to spawn the best we can do.");
+        }
+        entity.spawn(engine(), new Location(world(), location.getX(), location.getY(), location.getZ()));
+    }
+
+    @Director(description = "Teleport to the active studio world", aliases = "stp", origin = DirectorOrigin.PLAYER, sync = true)
+    public void tpstudio() {
+        if (!Iris.service(StudioSVC.class).isProjectOpen()) {
+            sender().sendMessage(C.RED + "No studio world is open!");
+            return;
+        }
+
+        if (IrisToolbelt.isIrisWorld(world()) && engine().isStudio()) {
+            sender().sendMessage(C.RED + "You are already in a studio world!");
+            return;
+        }
+
+        sender().sendMessage(C.GREEN + "Sending you to the studio world!");
+        var player = player();
+        BukkitPlatform.teleportAsync(player(), Iris.service(StudioSVC.class)
+                .getActiveProject()
+                .getActiveProvider()
+                .getTarget()
+                .getWorld()
+                .spawnLocation()
+        ).thenRun(() -> player.setGameMode(GameMode.SPECTATOR));
+    }
+
+    @Director(description = "Update your dimension projects VSCode workspace")
+    public void update(
+            @Param(description = "The dimension to update the workspace of", contextual = true, defaultValue = "default", customHandler = DimensionHandler.class)
+            IrisDimension dimension
+    ) {
+        sender().sendMessage(C.GOLD + "Updating Code Workspace for " + dimension.getName() + "...");
+        if (new IrisProject(dimension.getLoader().getDataFolder()).updateWorkspace()) {
+            sender().sendMessage(C.GREEN + "Updated Code Workspace for " + dimension.getName());
+        } else {
+            sender().sendMessage(C.RED + "Invalid project: " + dimension.getName() + ". Try deleting the code-workspace file and try again.");
+        }
+    }
+
+    @Director(aliases = "find-objects", description = "Capture an IGenData chunk report for nearby chunks")
+    public void objects() {
+        if (!IrisToolbelt.isIrisWorld(player().getWorld())) {
+            sender().sendMessage(C.RED + "You must be in an Iris world");
+            return;
+        }
+
+        World world = player().getWorld();
+
+        if (!IrisToolbelt.isIrisWorld(world)) {
+            sender().sendMessage("You must be in an iris world.");
+            return;
+        }
+        KList<Chunk> chunks = new KList<>();
+        int bx = player().getLocation().getChunk().getX();
+        int bz = player().getLocation().getChunk().getZ();
+
+        try {
+            Location l = player().getTargetBlockExact(48, FluidCollisionMode.NEVER).getLocation();
+
+            int cx = l.getChunk().getX();
+            int cz = l.getChunk().getZ();
+            new Spiraler(3, 3, (x, z) -> chunks.addIfMissing(world.getChunkAt(x + cx, z + cz))).drain();
+        } catch (Throwable e) {
+            Iris.reportError(e);
+        }
+
+        new Spiraler(3, 3, (x, z) -> chunks.addIfMissing(world.getChunkAt(x + bx, z + bz))).drain();
+        sender().sendMessage("Capturing IGenData from " + chunks.size() + " nearby chunks.");
+        try {
+            File ff = Iris.instance.getDataFile("reports/" + M.ms() + ".txt");
+            PrintWriter pw = new PrintWriter(ff);
+            pw.println("=== Iris Chunk Report ===");
+            pw.println("== General Info ==");
+            pw.println("Iris Version: " + Iris.instance.getDescription().getVersion());
+            pw.println("Bukkit Version: " + Bukkit.getBukkitVersion());
+            pw.println("MC Version: " + Bukkit.getVersion());
+            pw.println("PaperSpigot: " + (BukkitPlatform.isPaperServer() ? "Yup!" : "Nope!"));
+            pw.println("Report Captured At: " + new Date());
+            pw.println("Chunks: (" + chunks.size() + "): ");
+
+            for (Chunk i : chunks) {
+                pw.println("- [" + i.getX() + ", " + i.getZ() + "]");
+            }
+
+            int regions = 0;
+            long size = 0;
+            String age = "No idea...";
+
+            try {
+                for (File i : Objects.requireNonNull(new File(world.getWorldFolder(), "region").listFiles())) {
+                    if (i.isFile()) {
+                        size += i.length();
+                    }
+                }
+            } catch (Throwable e) {
+                Iris.reportError(e);
+            }
+
+            try {
+                FileTime creationTime = (FileTime) Files.getAttribute(world.getWorldFolder().toPath(), "creationTime");
+                age = hrf(Duration.of(M.ms() - creationTime.toMillis(), ChronoUnit.MILLIS));
+            } catch (IOException e) {
+                Iris.reportError(e);
+            }
+
+            KList<String> biomes = new KList<>();
+            KList<String> caveBiomes = new KList<>();
+            KMap<String, KMap<String, KList<String>>> objects = new KMap<>();
+
+            for (Chunk i : chunks) {
+                for (int j = 0; j < 16; j += 3) {
+
+                    for (int k = 0; k < 16; k += 3) {
+
+                        assert engine() != null;
+                        IrisBiome bb = engine().getSurfaceBiome((i.getX() * 16) + j, (i.getZ() * 16) + k);
+                        IrisBiome bxf = engine().getCaveBiome((i.getX() * 16) + j, (i.getZ() * 16) + k);
+                        biomes.addIfMissing(bb.getName() + " [" + Form.capitalize(bb.getInferredType().name().toLowerCase()) + "] " + " (" + bb.getLoadFile().getName() + ")");
+                        caveBiomes.addIfMissing(bxf.getName() + " (" + bxf.getLoadFile().getName() + ")");
+                        exportObjects(bb, pw, engine(), objects);
+                        exportObjects(bxf, pw, engine(), objects);
+                    }
+                }
+            }
+
+            regions = Objects.requireNonNull(new File(world.getWorldFolder().getPath() + "/region").list()).length;
+
+            pw.println();
+            pw.println("== World Info ==");
+            pw.println("World Name: " + world.getName());
+            pw.println("Age: " + age);
+            pw.println("Folder: " + world.getWorldFolder().getPath());
+            pw.println("Regions: " + Form.f(regions));
+            pw.println("Chunks: max. " + Form.f(regions * 32 * 32));
+            pw.println("World Size: min. " + Form.fileSize(size));
+            pw.println();
+            pw.println("== Biome Info ==");
+            pw.println("Found " + biomes.size() + " Biome(s): ");
+
+            for (String i : biomes) {
+                pw.println("- " + i);
+            }
+            pw.println();
+
+            pw.println("== Object Info ==");
+
+            for (String i : objects.k()) {
+                pw.println("- " + i);
+
+                for (String j : objects.get(i).k()) {
+                    pw.println("  @ " + j);
+
+                    for (String k : objects.get(i).get(j)) {
+                        pw.println("    * " + k);
+                    }
+                }
+            }
+
+            pw.println();
+            pw.close();
+
+            sender().sendMessage("Reported to: " + ff.getPath());
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+            Iris.reportError(e);
+        }
+    }
+
+    private void exportObjects(IrisBiome bb, PrintWriter pw, Engine g, KMap<String, KMap<String, KList<String>>> objects) {
+        String n1 = bb.getName() + " [" + Form.capitalize(bb.getInferredType().name().toLowerCase()) + "] " + " (" + bb.getLoadFile().getName() + ")";
+        int m = 0;
+        KSet<String> stop = new KSet<>();
+        for (IrisObjectPlacement f : bb.getObjects()) {
+            m++;
+            String n2 = "Placement #" + m + " (" + f.getPlace().size() + " possible objects)";
+
+            for (String i : f.getPlace()) {
+                String nn3 = i + ": [ERROR] Failed to find object!";
+
+                try {
+                    if (stop.contains(i)) {
+                        continue;
+                    }
+
+                    File ff = g.getData().getObjectLoader().findFile(i);
+                    art.arcane.iris.util.common.math.IrisBlockVector sz = IrisObject.sampleSize(ff);
+                    nn3 = i + ": size=[" + sz.getBlockX() + "," + sz.getBlockY() + "," + sz.getBlockZ() + "] location=[" + ff.getPath() + "]";
+                    stop.add(i);
+                } catch (Throwable e) {
+                    Iris.reportError(e);
+                }
+
+                String n3 = nn3;
+                objects.computeIfAbsent(n1, (k1) -> new KMap<>())
+                        .computeIfAbsent(n2, (k) -> new KList<>()).addIfMissing(n3);
+            }
+        }
+    }
+
+    /**
+     * @return true if server GUIs are not enabled
+     */
+    private boolean noGUI() {
+        if (!IrisSettings.get().getGui().isUseServerLaunchedGuis()) {
+            sender().sendMessage(C.RED + "You must have server launched GUIs enabled in the settings!");
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * @return true if no studio is open or the player is not in one
+     */
+    private boolean noStudio() {
+        if (!sender().isPlayer()) {
+            sender().sendMessage(C.RED + "Players only!");
+            return true;
+        }
+        if (!Iris.service(StudioSVC.class).isProjectOpen()) {
+            sender().sendMessage(C.RED + "No studio world is open!");
+            return true;
+        }
+        if (!engine().isStudio()) {
+            sender().sendMessage(C.RED + "You must be in a studio world!");
+            return true;
+        }
+        return false;
+    }
+
+
+    public void files(File clean, KList<File> files) {
+        if (clean.isDirectory()) {
+            for (File i : clean.listFiles()) {
+                files(i, files);
+            }
+        } else if (clean.getName().endsWith(".json")) {
+            try {
+                files.add(clean);
+            } catch (Throwable e) {
+                Iris.reportError(e);
+                Iris.error("Failed to beautify " + clean.getAbsolutePath() + " You may have errors in your json!");
+            }
+        }
+    }
+
+    private void fixBlocks(JSONObject obj) {
+        for (String i : obj.keySet()) {
+            Object o = obj.get(i);
+
+            if (i.equals("block") && o instanceof String && !o.toString().trim().isEmpty() && !o.toString().contains(":")) {
+                obj.put(i, "minecraft:" + o);
+            }
+
+            if (o instanceof JSONObject) {
+                fixBlocks((JSONObject) o);
+            } else if (o instanceof JSONArray) {
+                fixBlocks((JSONArray) o);
+            }
+        }
+    }
+
+    private void fixBlocks(JSONArray obj) {
+        for (int i = 0; i < obj.length(); i++) {
+            Object o = obj.get(i);
+
+            if (o instanceof JSONObject) {
+                fixBlocks((JSONObject) o);
+            } else if (o instanceof JSONArray) {
+                fixBlocks((JSONArray) o);
+            }
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/commands/CommandWhat.java

@@ -0,0 +1,207 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.commands;
+
+import art.arcane.iris.platform.bukkit.BukkitBlockResolution;
+
+import art.arcane.iris.platform.bukkit.BukkitPlatform;
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.edit.BlockSignal;
+import art.arcane.iris.core.nms.INMS;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.platform.EngineBukkitOps;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisRegion;
+import art.arcane.iris.util.common.director.DirectorExecutor;
+import art.arcane.volmlib.util.director.DirectorOrigin;
+import art.arcane.volmlib.util.director.annotations.Director;
+import art.arcane.volmlib.util.director.annotations.Param;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.matter.MatterMarker;
+import org.bukkit.Chunk;
+import org.bukkit.FluidCollisionMode;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.block.Biome;
+import org.bukkit.block.data.BlockData;
+
+import java.lang.reflect.Method;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@Director(name = "what", origin = DirectorOrigin.PLAYER, description = "Iris What?")
+public class CommandWhat implements DirectorExecutor {
+    @Director(description = "What is in my hand?", origin = DirectorOrigin.PLAYER)
+    public void hand() {
+        try {
+            BlockData bd = player().getInventory().getItemInMainHand().getType().createBlockData();
+            if (!bd.getMaterial().equals(Material.AIR)) {
+                sender().sendMessage("Material: " + C.GREEN + bd.getMaterial().name());
+                sender().sendMessage("Full: " + C.WHITE + bd.getAsString(true));
+            } else {
+                sender().sendMessage("Please hold a block/item");
+            }
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            Material bd = player().getInventory().getItemInMainHand().getType();
+            if (!bd.equals(Material.AIR)) {
+                sender().sendMessage("Material: " + C.GREEN + bd.name());
+            } else {
+                sender().sendMessage("Please hold a block/item");
+            }
+        }
+    }
+
+    @Director(description = "What biome am i in?", origin = DirectorOrigin.PLAYER)
+    public void biome() {
+        try {
+            IrisBiome b = engine().getBiome(player().getLocation().getBlockX(), player().getLocation().getBlockY() - player().getWorld().getMinHeight(), player().getLocation().getBlockZ());
+            Biome derivative = b.getDerivative();
+            NamespacedKey derivativeKey = resolveBiomeKey(derivative);
+            sender().sendMessage("IBiome: " + b.getLoadKey() + " (" + (derivativeKey == null ? "unregistered" : derivativeKey.getKey()) + ")");
+
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            Biome biome = player().getLocation().getBlock().getBiome();
+            NamespacedKey key = resolveBiomeKey(biome);
+            sender().sendMessage("Non-Iris Biome: " + (key == null ? "unregistered" : key));
+
+            if (key == null || key.getKey().equals("custom")) {
+                try {
+                    sender().sendMessage("Data Pack Biome: " + INMS.get().getTrueBiomeBaseKey(player().getLocation()) + " (ID: " + INMS.get().getTrueBiomeBaseId(INMS.get().getTrueBiomeBase(player().getLocation())) + ")");
+                } catch (Throwable ee) {
+                    Iris.reportError(ee);
+                }
+            }
+        }
+    }
+
+    @Director(description = "What region am i in?", origin = DirectorOrigin.PLAYER)
+    public void region() {
+        try {
+            Chunk chunk = world().getChunkAt(player().getLocation().getBlockX() >> 4, player().getLocation().getBlockZ() >> 4);
+            IrisRegion r = EngineBukkitOps.getRegion(engine(), chunk);
+            sender().sendMessage("IRegion: " + r.getLoadKey() + " (" + r.getName() + ")");
+
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            sender().sendMessage(C.IRIS + "Iris worlds only.");
+        }
+    }
+
+    @Director(description = "What block am i looking at?", origin = DirectorOrigin.PLAYER)
+    public void block() {
+        BlockData bd;
+        try {
+            bd = player().getTargetBlockExact(128, FluidCollisionMode.NEVER).getBlockData();
+        } catch (NullPointerException e) {
+            Iris.reportError(e);
+            sender().sendMessage("Please look at any block, not at the sky");
+            bd = null;
+        }
+
+        if (bd != null) {
+            sender().sendMessage("Material: " + C.GREEN + bd.getMaterial().name());
+            sender().sendMessage("Full: " + C.WHITE + bd.getAsString(true));
+
+            if (BukkitBlockResolution.isStorage(bd)) {
+                sender().sendMessage(C.YELLOW + "* Storage Block (Loot Capable)");
+            }
+
+            if (BukkitBlockResolution.isLit(bd)) {
+                sender().sendMessage(C.YELLOW + "* Lit Block (Light Capable)");
+            }
+
+            if (BukkitBlockResolution.isFoliage(bd)) {
+                sender().sendMessage(C.YELLOW + "* Foliage Block");
+            }
+
+            if (BukkitBlockResolution.isDecorant(bd)) {
+                sender().sendMessage(C.YELLOW + "* Decorant Block");
+            }
+
+            if (BukkitBlockResolution.isFluid(bd)) {
+                sender().sendMessage(C.YELLOW + "* Fluid Block");
+            }
+
+            if (BukkitBlockResolution.isFoliagePlantable(bd)) {
+                sender().sendMessage(C.YELLOW + "* Plantable Foliage Block");
+            }
+
+            if (BukkitBlockResolution.isSolid(bd)) {
+                sender().sendMessage(C.YELLOW + "* Solid Block");
+            }
+        }
+    }
+
+    @Director(description = "Show markers in chunk", origin = DirectorOrigin.PLAYER)
+    public void markers(@Param(description = "Marker name such as cave_floor or cave_ceiling") String marker) {
+        Chunk c = player().getLocation().getChunk();
+
+        if (IrisToolbelt.isIrisWorld(c.getWorld())) {
+            int m = 1;
+            AtomicInteger v = new AtomicInteger(0);
+
+            for (int xxx = c.getX() - 4; xxx <= c.getX() + 4; xxx++) {
+                for (int zzz = c.getZ() - 4; zzz <= c.getZ() + 4; zzz++) {
+                    IrisToolbelt.access(c.getWorld()).getEngine().getMantle().findMarkers(xxx, zzz, new MatterMarker(marker))
+                            .convert((i) -> BukkitPlatform.toLocation(i, c.getWorld())).forEach((i) -> {
+                                BlockSignal.of(i.getWorld(), i.getBlockX(), i.getBlockY(), i.getBlockZ(), 100);
+                                v.incrementAndGet();
+                            });
+                }
+            }
+
+            sender().sendMessage("Found " + v.get() + " Nearby Markers (" + marker + ")");
+        } else {
+            sender().sendMessage(C.IRIS + "Iris worlds only.");
+        }
+    }
+
+    private NamespacedKey resolveBiomeKey(Biome biome) {
+        Object keyOrNullValue = invokeNoThrow(biome, "getKeyOrNull");
+        if (keyOrNullValue instanceof NamespacedKey namespacedKey) {
+            return namespacedKey;
+        }
+
+        Object keyOrThrowValue = invokeNoThrow(biome, "getKeyOrThrow");
+        if (keyOrThrowValue instanceof NamespacedKey namespacedKey) {
+            return namespacedKey;
+        }
+
+        Object keyValue = invokeNoThrow(biome, "getKey");
+        if (keyValue instanceof NamespacedKey namespacedKey) {
+            return namespacedKey;
+        }
+
+        return null;
+    }
+
+    private Object invokeNoThrow(Biome biome, String methodName) {
+        if (biome == null) {
+            return null;
+        }
+
+        try {
+            Method method = biome.getClass().getMethod(methodName);
+            return method.invoke(biome);
+        } catch (Throwable ignored) {
+            return null;
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/edit/BlockEditor.java

@@ -16,7 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.volmit.iris.core.edit;
+package art.arcane.iris.core.edit;
 
 import org.bukkit.block.Biome;
 import org.bukkit.block.data.BlockData;

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/edit/BukkitBlockEditor.java

@@ -16,9 +16,9 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.volmit.iris.core.edit;
+package art.arcane.iris.core.edit;
 
-import com.volmit.iris.util.math.M;
+import art.arcane.volmlib.util.math.M;
 import org.bukkit.World;
 import org.bukkit.block.Biome;
 import org.bukkit.block.data.BlockData;
@@ -51,10 +51,13 @@ public class BukkitBlockEditor implements BlockEditor {
         return M.ms();
     }
 
-    @SuppressWarnings("deprecation")
     @Override
     public void setBiome(int x, int z, Biome b) {
-        world.setBiome(x, z, b);
+        int minHeight = world.getMinHeight();
+        int maxHeight = world.getMaxHeight();
+        for (int y = minHeight; y < maxHeight; y++) {
+            world.setBiome(x, y, z, b);
+        }
     }
 
     @Override
@@ -67,9 +70,8 @@ public class BukkitBlockEditor implements BlockEditor {
         return world.getBiome(x, y, z);
     }
 
-    @SuppressWarnings("deprecation")
     @Override
     public Biome getBiome(int x, int z) {
-        return world.getBiome(x, z);
+        return world.getBiome(x, world.getMinHeight(), z);
     }
 }

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/gui/BukkitGuiHost.java

@@ -0,0 +1,91 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.gui;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.events.IrisEngineHotloadEvent;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class BukkitGuiHost implements GuiHost.Provider {
+    private final Map<Runnable, Listener> hotloadHooks = new ConcurrentHashMap<>();
+
+    public static void install() {
+        GuiHost.set(new BukkitGuiHost());
+    }
+
+    @Override
+    public Engine findActiveEngine() {
+        try {
+            for (World world : new ArrayList<>(Bukkit.getWorlds())) {
+                try {
+                    PlatformChunkGenerator access = IrisToolbelt.access(world);
+                    if (access != null && access.getEngine() != null && !access.getEngine().isClosed()) {
+                        return access.getEngine();
+                    }
+                } catch (Throwable ignored) {
+                }
+            }
+        } catch (Throwable ignored) {
+        }
+        return null;
+    }
+
+    @Override
+    public void registerHotloadHook(Runnable onHotload) {
+        Listener listener = new HotloadListener(onHotload);
+        hotloadHooks.put(onHotload, listener);
+        Iris.instance.registerListener(listener);
+    }
+
+    @Override
+    public void unregisterHotloadHook(Runnable onHotload) {
+        Listener listener = hotloadHooks.remove(onHotload);
+        if (listener != null) {
+            Iris.instance.unregisterListener(listener);
+        }
+    }
+
+    @Override
+    public GuiOverlay overlayFor(Engine engine) {
+        return engine == null ? null : new BukkitVisionOverlay(engine);
+    }
+
+    private static final class HotloadListener implements Listener {
+        private final Runnable onHotload;
+
+        private HotloadListener(Runnable onHotload) {
+            this.onHotload = onHotload;
+        }
+
+        @EventHandler
+        public void on(IrisEngineHotloadEvent event) {
+            onHotload.run();
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/gui/BukkitVisionOverlay.java

@@ -0,0 +1,111 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.gui;
+
+import art.arcane.iris.engine.IrisComplex;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.framework.render.RenderType;
+import art.arcane.iris.engine.object.IrisWorld;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.format.Form;
+import org.bukkit.Location;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.function.Consumer;
+
+import static art.arcane.iris.util.common.data.registry.Attributes.MAX_HEALTH;
+
+public final class BukkitVisionOverlay implements GuiOverlay {
+    private final Engine engine;
+
+    public BukkitVisionOverlay(Engine engine) {
+        this.engine = engine;
+    }
+
+    @Override
+    public List<GuiMarker> players() {
+        IrisWorld world = engine.getWorld();
+        List<GuiMarker> markers = new ArrayList<>();
+        for (Player player : world.getPlayers()) {
+            markers.add(GuiMarker.player(player.getName(), player.getLocation().getX(), player.getLocation().getZ()));
+        }
+        return markers;
+    }
+
+    @Override
+    public void requestEntities(Consumer<List<GuiMarker>> sink) {
+        J.s(() -> {
+            IrisWorld world = engine.getWorld();
+            List<GuiMarker> markers = new ArrayList<>();
+            for (LivingEntity entity : world.getEntitiesByClass(LivingEntity.class)) {
+                if (entity instanceof Player) {
+                    continue;
+                }
+                String label = Form.capitalizeWords(entity.getType().name().toLowerCase(Locale.ROOT).replaceAll("\\Q_\\E", " "));
+                double maxHealth = 0;
+                try {
+                    maxHealth = entity.getAttribute(MAX_HEALTH).getValue();
+                } catch (Throwable ignored) {
+                }
+                markers.add(GuiMarker.entity(label, entity.getLocation().getX(), entity.getLocation().getY(), entity.getLocation().getZ(),
+                        entity.getHealth(), maxHealth));
+            }
+            sink.accept(markers);
+        });
+    }
+
+    @Override
+    public void teleport(double worldX, double worldZ) {
+        IrisWorld world = engine.getWorld();
+        if (!world.hasRealWorld()) {
+            return;
+        }
+        J.s(() -> {
+            List<Player> players = world.getPlayers();
+            if (players.isEmpty()) {
+                return;
+            }
+            Player player = players.get(0);
+            int xx = (int) worldX;
+            int zz = (int) worldZ;
+            int yy = player.getWorld().getHighestBlockYAt(xx, zz) + 1;
+            player.teleport(new Location(player.getWorld(), xx, yy, zz));
+        });
+    }
+
+    @Override
+    public String openInEditor(double worldX, double worldZ, RenderType type) {
+        IrisComplex complex = engine.getComplex();
+        File file = switch (type) {
+            case BIOME, LAYER_LOAD, DECORATOR_LOAD, OBJECT_LOAD, HEIGHT ->
+                    complex.getTrueBiomeStream().get(worldX, worldZ).openInVSCode();
+            case BIOME_LAND -> complex.getLandBiomeStream().get(worldX, worldZ).openInVSCode();
+            case BIOME_SEA -> complex.getSeaBiomeStream().get(worldX, worldZ).openInVSCode();
+            case REGION -> complex.getRegionStream().get(worldX, worldZ).openInVSCode();
+            case CAVE_LAND -> complex.getCaveBiomeStream().get(worldX, worldZ).openInVSCode();
+            default -> null;
+        };
+        return file == null ? null : file.getName();
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/link/IrisPapiExpansion.java

@@ -16,36 +16,38 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.volmit.iris.core.link;
+package art.arcane.iris.core.link;
 
-import com.volmit.iris.Iris;
-import com.volmit.iris.core.tools.IrisToolbelt;
-import com.volmit.iris.engine.object.IrisBiome;
-import com.volmit.iris.engine.platform.PlatformChunkGenerator;
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.platform.EngineBukkitOps;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
 import me.clip.placeholderapi.expansion.PlaceholderExpansion;
 import org.bukkit.Location;
 import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
 
 // See/update https://app.gitbook.com/@volmitsoftware/s/iris/compatability/papi/
 public class IrisPapiExpansion extends PlaceholderExpansion {
     @Override
-    public String getIdentifier() {
+    public @NotNull String getIdentifier() {
         return "iris";
     }
 
     @Override
-    public String getAuthor() {
+    public @NotNull String getAuthor() {
         return "Volmit Software";
     }
 
     @Override
-    public String getVersion() {
+    public @NotNull String getVersion() {
         return Iris.instance.getDescription().getVersion();
     }
 
     @Override
     public boolean persist() {
-        return false;
+        return true;
     }
 
     @Override
@@ -53,55 +55,55 @@ public class IrisPapiExpansion extends PlaceholderExpansion {
         Location l = null;
         PlatformChunkGenerator a = null;
 
-        if(player.isOnline()) {
-            l = player.getPlayer().getLocation();
+        if (player.isOnline() && player.getPlayer() != null) {
+            l = player.getPlayer().getLocation().add(0, 2, 0);
             a = IrisToolbelt.access(l.getWorld());
         }
 
-        if(p.equalsIgnoreCase("biome_name")) {
-            if(a != null) {
+        if (p.equalsIgnoreCase("biome_name")) {
+            if (a != null) {
                 return getBiome(a, l).getName();
             }
-        } else if(p.equalsIgnoreCase("biome_id")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("biome_id")) {
+            if (a != null) {
                 return getBiome(a, l).getLoadKey();
             }
-        } else if(p.equalsIgnoreCase("biome_file")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("biome_file")) {
+            if (a != null) {
                 return getBiome(a, l).getLoadFile().getPath();
             }
-        } else if(p.equalsIgnoreCase("region_name")) {
-            if(a != null) {
-                return a.getEngine().getRegion(l).getName();
+        } else if (p.equalsIgnoreCase("region_name")) {
+            if (a != null) {
+                return EngineBukkitOps.getRegion(a.getEngine(), l).getName();
             }
-        } else if(p.equalsIgnoreCase("region_id")) {
-            if(a != null) {
-                return a.getEngine().getRegion(l).getLoadKey();
+        } else if (p.equalsIgnoreCase("region_id")) {
+            if (a != null) {
+                return EngineBukkitOps.getRegion(a.getEngine(), l).getLoadKey();
             }
-        } else if(p.equalsIgnoreCase("region_file")) {
-            if(a != null) {
-                return a.getEngine().getRegion(l).getLoadFile().getPath();
+        } else if (p.equalsIgnoreCase("region_file")) {
+            if (a != null) {
+                return EngineBukkitOps.getRegion(a.getEngine(), l).getLoadFile().getPath();
             }
-        } else if(p.equalsIgnoreCase("terrain_slope")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("terrain_slope")) {
+            if (a != null) {
                 return (a.getEngine())
-                    .getComplex().getSlopeStream()
-                    .get(l.getX(), l.getZ()) + "";
+                        .getComplex().getSlopeStream()
+                        .get(l.getX(), l.getZ()) + "";
             }
-        } else if(p.equalsIgnoreCase("terrain_height")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("terrain_height")) {
+            if (a != null) {
                 return Math.round(a.getEngine().getHeight(l.getBlockX(), l.getBlockZ())) + "";
             }
-        } else if(p.equalsIgnoreCase("world_mode")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("world_mode")) {
+            if (a != null) {
                 return a.isStudio() ? "Studio" : "Production";
             }
-        } else if(p.equalsIgnoreCase("world_seed")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("world_seed")) {
+            if (a != null) {
                 return a.getEngine().getSeedManager().getSeed() + "";
             }
-        } else if(p.equalsIgnoreCase("world_speed")) {
-            if(a != null) {
+        } else if (p.equalsIgnoreCase("world_speed")) {
+            if (a != null) {
                 return a.getEngine().getGeneratedPerSecond() + "/s";
             }
         }

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/CommandSVC.java

@@ -0,0 +1,310 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.service;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.iris.core.commands.CommandIris;
+import art.arcane.iris.engine.data.cache.AtomicCache;
+import art.arcane.iris.util.common.director.DirectorContext;
+import art.arcane.iris.util.common.director.DirectorContextHandler;
+import art.arcane.iris.util.common.director.DirectorSystem;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.iris.util.common.plugin.IrisService;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.director.compat.DirectorEngineFactory;
+import art.arcane.volmlib.util.director.context.DirectorContextRegistry;
+import art.arcane.volmlib.util.director.runtime.DirectorExecutionMode;
+import art.arcane.volmlib.util.director.runtime.DirectorExecutionResult;
+import art.arcane.volmlib.util.director.runtime.DirectorInvocation;
+import art.arcane.volmlib.util.director.runtime.DirectorInvocationHook;
+import art.arcane.volmlib.util.director.runtime.DirectorRuntimeEngine;
+import art.arcane.volmlib.util.director.runtime.DirectorRuntimeNode;
+import art.arcane.volmlib.util.director.runtime.DirectorSender;
+import art.arcane.volmlib.util.director.visual.DirectorVisualCommand;
+import art.arcane.volmlib.util.math.RNG;
+import org.bukkit.Sound;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.PluginCommand;
+import org.bukkit.command.TabCompleter;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+public class CommandSVC implements IrisService, CommandExecutor, TabCompleter, DirectorInvocationHook {
+    private static final String ROOT_COMMAND = "iris";
+    private static final String ROOT_PERMISSION = "iris.all";
+
+    private final transient AtomicCache<DirectorRuntimeEngine> directorCache = new AtomicCache<>();
+    private final transient AtomicCache<DirectorVisualCommand> helpCache = new AtomicCache<>();
+
+    @Override
+    public void onEnable() {
+        PluginCommand command = findBukkitCommand();
+        if (command != null) {
+            command.setExecutor(this);
+            command.setTabCompleter(this);
+        } else {
+            registerPaperCommand();
+        }
+        J.a(this::getDirector);
+    }
+
+    @Override
+    public void onDisable() {
+
+    }
+
+    public DirectorRuntimeEngine getDirector() {
+        return directorCache.aquireNastyPrint(() -> DirectorEngineFactory.create(
+                new CommandIris(),
+                null,
+                buildDirectorContexts(),
+                this::dispatchDirector,
+                this,
+                DirectorSystem.handlers
+        ));
+    }
+
+    private DirectorContextRegistry buildDirectorContexts() {
+        DirectorContextRegistry contexts = new DirectorContextRegistry();
+
+        for (Map.Entry<Class<?>, DirectorContextHandler<?>> entry : DirectorContextHandler.contextHandlers.entrySet()) {
+            registerContextHandler(contexts, entry.getKey(), entry.getValue());
+        }
+
+        return contexts;
+    }
+
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    private void registerContextHandler(DirectorContextRegistry contexts, Class<?> type, DirectorContextHandler<?> handler) {
+        contexts.register((Class) type, (invocation, map) -> {
+            if (invocation.getSender() instanceof BukkitDirectorSender sender) {
+                return ((DirectorContextHandler) handler).handle(new VolmitSender(sender.sender()));
+            }
+
+            return null;
+        });
+    }
+
+    private void dispatchDirector(DirectorExecutionMode mode, Runnable runnable) {
+        if (mode == DirectorExecutionMode.SYNC) {
+            J.s(runnable);
+        } else {
+            runnable.run();
+        }
+    }
+
+    @Override
+    public void beforeInvoke(DirectorInvocation invocation, DirectorRuntimeNode node) {
+        if (invocation.getSender() instanceof BukkitDirectorSender sender) {
+            DirectorContext.touch(new VolmitSender(sender.sender()));
+        }
+    }
+
+    @Override
+    public void afterInvoke(DirectorInvocation invocation, DirectorRuntimeNode node) {
+        DirectorContext.remove();
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
+        if (!command.getName().equalsIgnoreCase(ROOT_COMMAND)) {
+            return List.of();
+        }
+
+        return tabCompleteRoot(sender, alias, args);
+    }
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        if (!command.getName().equalsIgnoreCase(ROOT_COMMAND)) {
+            return false;
+        }
+
+        executeRoot(sender, label, args);
+        return true;
+    }
+
+    void executeRoot(CommandSender sender, String label, String[] args) {
+        if (!sender.hasPermission(ROOT_PERMISSION)) {
+            sender.sendMessage("You lack the Permission '" + ROOT_PERMISSION + "'");
+            return;
+        }
+
+        J.aBukkit(() -> executeCommand(sender, label, args));
+    }
+
+    List<String> tabCompleteRoot(CommandSender sender, String alias, String[] args) {
+        List<String> suggestions = runDirectorTab(sender, alias, args);
+        if (sender instanceof Player player && IrisSettings.get().getGeneral().isCommandSounds()) {
+            player.playSound(player.getLocation(), Sound.BLOCK_AMETHYST_BLOCK_CHIME, 0.25f, RNG.r.f(0.125f, 1.95f));
+        }
+        return suggestions;
+    }
+
+    private PluginCommand findBukkitCommand() {
+        try {
+            return Iris.instance.getCommand(ROOT_COMMAND);
+        } catch (UnsupportedOperationException ignored) {
+            return null;
+        }
+    }
+
+    private void registerPaperCommand() {
+        try {
+            Class<?> registrarType = Class.forName(
+                    "art.arcane.iris.core.service.PaperCommandRegistrar",
+                    true,
+                    getClass().getClassLoader()
+            );
+            Method register = registrarType.getDeclaredMethod("register", Iris.class, CommandSVC.class);
+            register.invoke(null, Iris.instance, this);
+        } catch (InvocationTargetException e) {
+            Throwable cause = e.getCause() == null ? e : e.getCause();
+            throw new IllegalStateException("Paper command registration failed", cause);
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException("Paper command registrar is unavailable", e);
+        } catch (LinkageError e) {
+            throw new IllegalStateException("Paper command APIs are unavailable", e);
+        }
+    }
+
+    private void executeCommand(CommandSender sender, String label, String[] args) {
+        if (sendHelpIfRequested(sender, args)) {
+            playSuccessSound(sender);
+            return;
+        }
+
+        DirectorExecutionResult result = runDirector(sender, label, args);
+
+        if (result.isSuccess()) {
+            playSuccessSound(sender);
+            return;
+        }
+
+        playFailureSound(sender);
+        if (result.getMessage() == null || result.getMessage().trim().isEmpty()) {
+            new VolmitSender(sender).sendMessage(C.RED + "Unknown Iris Command");
+        }
+    }
+
+    private boolean sendHelpIfRequested(CommandSender sender, String[] args) {
+        Optional<DirectorVisualCommand.HelpRequest> request = DirectorVisualCommand.resolveHelp(getHelpRoot(), Arrays.asList(args));
+        if (request.isEmpty()) {
+            return false;
+        }
+
+        VolmitSender volmitSender = new VolmitSender(sender);
+        volmitSender.sendDirectorHelp(request.get().command(), request.get().page());
+        return true;
+    }
+
+    private DirectorVisualCommand getHelpRoot() {
+        return helpCache.aquireNastyPrint(() -> DirectorVisualCommand.createRoot(getDirector()));
+    }
+
+    private DirectorExecutionResult runDirector(CommandSender sender, String label, String[] args) {
+        try {
+            return getDirector().execute(new DirectorInvocation(new BukkitDirectorSender(sender), label, Arrays.asList(args)));
+        } catch (Throwable e) {
+            Iris.warn("Director command execution failed: " + e.getClass().getSimpleName() + " " + e.getMessage());
+            return DirectorExecutionResult.notHandled();
+        }
+    }
+
+    private List<String> runDirectorTab(CommandSender sender, String alias, String[] args) {
+        DirectorContext.touch(new VolmitSender(sender));
+        try {
+            return getDirector().tabComplete(new DirectorInvocation(new BukkitDirectorSender(sender), alias, Arrays.asList(args)));
+        } catch (Throwable e) {
+            Iris.warn("Director tab completion failed: " + e.getClass().getSimpleName() + " " + e.getMessage());
+            return List.of();
+        } finally {
+            DirectorContext.remove();
+        }
+    }
+
+    private void playFailureSound(CommandSender sender) {
+        if (!IrisSettings.get().getGeneral().isCommandSounds()) {
+            return;
+        }
+
+        if (sender instanceof Player player) {
+            J.s(() -> playSounds(player, Sound.BLOCK_AMETHYST_CLUSTER_BREAK, 0.77f, 0.25f, Sound.BLOCK_BEACON_DEACTIVATE, 0.2f, 0.45f));
+        }
+    }
+
+    private void playSuccessSound(CommandSender sender) {
+        if (!IrisSettings.get().getGeneral().isCommandSounds()) {
+            return;
+        }
+
+        if (sender instanceof Player player) {
+            J.s(() -> playSounds(player, Sound.BLOCK_AMETHYST_CLUSTER_BREAK, 0.77f, 1.65f, Sound.BLOCK_RESPAWN_ANCHOR_CHARGE, 0.125f, 2.99f));
+        }
+    }
+
+    private static final java.util.concurrent.atomic.AtomicBoolean SOUND_LOGGED = new java.util.concurrent.atomic.AtomicBoolean(false);
+
+    private void playSounds(Player player, Sound a, float av, float ap, Sound b, float bv, float bp) {
+        try {
+            player.playSound(player.getLocation(), a, av, ap);
+            player.playSound(player.getLocation(), b, bv, bp);
+        } catch (Throwable e) {
+            if (SOUND_LOGGED.compareAndSet(false, true)) {
+                try {
+                    java.io.File f = Iris.instance.getDataFile("adventure-debug.txt");
+                    java.nio.file.Files.writeString(f.toPath(), "SOUND FAIL: " + e.getClass().getName() + ": " + e.getMessage() + "\n", java.nio.file.StandardOpenOption.CREATE, java.nio.file.StandardOpenOption.APPEND);
+                } catch (Throwable ignored) {
+                }
+            }
+        }
+    }
+
+    private record BukkitDirectorSender(CommandSender sender) implements DirectorSender {
+        @Override
+        public String getName() {
+            return sender.getName();
+        }
+
+        @Override
+        public boolean isPlayer() {
+            return sender instanceof Player;
+        }
+
+        @Override
+        public void sendMessage(String message) {
+            if (message != null && !message.trim().isEmpty()) {
+                sender.sendMessage(message);
+            }
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/EditSVC.java

@@ -16,32 +16,42 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.volmit.iris.core.service;
+package art.arcane.iris.core.service;
 
-import com.volmit.iris.Iris;
-import com.volmit.iris.core.edit.BlockEditor;
-import com.volmit.iris.core.edit.BukkitBlockEditor;
-import com.volmit.iris.util.collection.KMap;
-import com.volmit.iris.util.math.M;
-import com.volmit.iris.util.plugin.IrisService;
-import org.bukkit.Bukkit;
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.edit.BlockEditor;
+import art.arcane.iris.core.edit.BukkitBlockEditor;
+import art.arcane.iris.engine.framework.BlockEditAccess;
+import art.arcane.volmlib.util.collection.KMap;
+import art.arcane.volmlib.util.math.M;
+import art.arcane.iris.util.common.plugin.IrisService;
+import art.arcane.iris.util.common.scheduling.J;
 import org.bukkit.World;
 import org.bukkit.block.Biome;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.world.WorldUnloadEvent;
 
-public class EditSVC implements IrisService {
+public class EditSVC implements IrisService, BlockEditAccess<World, BlockData, Biome> {
     private KMap<World, BlockEditor> editors;
+    private int updateTaskId = -1;
+    public static boolean deletingWorld = false;
 
     @Override
     public void onEnable() {
         this.editors = new KMap<>();
-        Bukkit.getScheduler().scheduleSyncRepeatingTask(Iris.instance, this::update, 1000, 1000);
+        updateTaskId = J.sr(this::update, 1000);
     }
 
     @Override
     public void onDisable() {
+        if (updateTaskId != -1) {
+            J.csr(updateTaskId);
+            updateTaskId = -1;
+        }
+        if (editors == null) {
+            return;
+        }
         flushNow();
     }
 
@@ -71,27 +81,40 @@ public class EditSVC implements IrisService {
 
     @EventHandler
     public void on(WorldUnloadEvent e) {
-        if(editors.containsKey(e.getWorld())) {
+        if (editors == null) {
+            return;
+        }
+        if (editors.containsKey(e.getWorld()) && !deletingWorld) {
             editors.remove(e.getWorld()).close();
         }
     }
 
+
     public void update() {
-        for(World i : editors.k()) {
-            if(M.ms() - editors.get(i).last() > 1000) {
+        if (editors == null) {
+            return;
+        }
+        for (World i : editors.k()) {
+            if (M.ms() - editors.get(i).last() > 1000) {
                 editors.remove(i).close();
             }
         }
     }
 
     public void flushNow() {
-        for(World i : editors.k()) {
+        if (editors == null) {
+            return;
+        }
+        for (World i : editors.k()) {
             editors.remove(i).close();
         }
     }
 
     public BlockEditor open(World world) {
-        if(editors.containsKey(world)) {
+        if (editors == null) {
+            editors = new KMap<>();
+        }
+        if (editors.containsKey(world)) {
             return editors.get(world);
         }
 

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/IrisEngineSVC.java

@@ -0,0 +1,453 @@
+package art.arcane.iris.core.service;
+
+import com.google.common.util.concurrent.AtomicDouble;
+import art.arcane.iris.spi.IrisLogging;
+import art.arcane.iris.spi.IrisServices;
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.iris.core.loader.ResourceLoader;
+import art.arcane.iris.core.runtime.GoldenHashScanner;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
+import art.arcane.volmlib.util.collection.KMap;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.format.Form;
+import art.arcane.volmlib.util.math.RNG;
+import art.arcane.iris.util.common.plugin.IrisService;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.volmlib.util.scheduling.Looper;
+import art.arcane.iris.util.project.stream.utility.CachedDoubleStream2D;
+import art.arcane.iris.util.project.stream.utility.CachedStream2D;
+import art.arcane.iris.util.project.stream.utility.CachedStream3D;
+import art.arcane.iris.core.gui.PregeneratorJob;
+import art.arcane.iris.core.pregenerator.MantleHeapPressure;
+import lombok.Synchronized;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.world.WorldLoadEvent;
+import org.bukkit.event.world.WorldUnloadEvent;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Locale;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+public class IrisEngineSVC implements IrisService {
+    private static final int TRIM_PERIOD = 2_000;
+    private final AtomicInteger tectonicLimit = new AtomicInteger(30);
+    private final AtomicInteger tectonicPlates = new AtomicInteger();
+    private final AtomicInteger queuedTectonicPlates = new AtomicInteger();
+    private final AtomicInteger trimmerAlive = new AtomicInteger();
+    private final AtomicInteger unloaderAlive = new AtomicInteger();
+    private final AtomicInteger totalWorlds = new AtomicInteger();
+    private final AtomicDouble maxIdleDuration = new AtomicDouble();
+    private final AtomicDouble minIdleDuration = new AtomicDouble();
+    private final AtomicLong loadedChunks = new AtomicLong();
+    private final KMap<World, Registered> worlds = new KMap<>();
+    private ScheduledExecutorService service;
+    private Looper updateTicker;
+
+    @Override
+    public void onEnable() {
+        var settings = IrisSettings.get().getPerformance();
+        var engine = settings.getEngineSVC();
+        service = Executors.newScheduledThreadPool(0,
+                (engine.isUseVirtualThreads()
+                        ? Thread.ofVirtual()
+                        : Thread.ofPlatform().priority(engine.getPriority()))
+                        .name("Iris EngineSVC-", 0)
+                        .factory());
+        tectonicLimit.set(settings.getTectonicPlateSize());
+        Bukkit.getWorlds().forEach(this::add);
+        setup();
+    }
+
+    @Override
+    public void onDisable() {
+        for (World world : worlds.keySet()) {
+            PlatformChunkGenerator gen = IrisToolbelt.access(world);
+            if (gen == null) continue;
+            try {
+                gen.close();
+            } catch (Throwable t) {
+                IrisLogging.reportError(t);
+            }
+        }
+        if (service != null) {
+            service.shutdown();
+        }
+        if (updateTicker != null) {
+            updateTicker.interrupt();
+        }
+        worlds.keySet().forEach(this::remove);
+        worlds.clear();
+    }
+
+    public int getQueuedTectonicPlateCount() {
+        return queuedTectonicPlates.get();
+    }
+
+    public double getAverageIdleDuration() {
+        double min = minIdleDuration.get();
+        double max = maxIdleDuration.get();
+        if (!Double.isFinite(min) || !Double.isFinite(max) || min < 0D || max < 0D) {
+            return 0D;
+        }
+
+        if (max < min) {
+            return max;
+        }
+
+        return (min + max) / 2D;
+    }
+
+    public double getBiomeCacheUsageRatio() {
+        PreservationSVC preservation = IrisServices.get(PreservationSVC.class);
+        if (preservation == null) {
+            return 0D;
+        }
+
+        double total = 0D;
+        int count = 0;
+        for (var cache : preservation.getCaches()) {
+            if (!(cache instanceof CachedStream2D<?>) && !(cache instanceof CachedDoubleStream2D)) {
+                continue;
+            }
+
+            double usage = cache.getUsage();
+            if (!Double.isFinite(usage)) {
+                continue;
+            }
+
+            total += Math.max(0D, Math.min(1D, usage));
+            count++;
+        }
+
+        if (count <= 0) {
+            return 0D;
+        }
+
+        return total / count;
+    }
+
+    public void engineStatus(VolmitSender sender) {
+        long[] sizes = new long[4];
+        long[] count = new long[4];
+
+        for (var cache : IrisServices.get(PreservationSVC.class).getCaches()) {
+            var type = switch (cache) {
+                case ResourceLoader<?> ignored -> 0;
+                case CachedStream2D<?> ignored -> 1;
+                case CachedDoubleStream2D ignored -> 1;
+                case CachedStream3D<?> ignored -> 2;
+                default -> 3;
+            };
+
+            sizes[type] += cache.getSize();
+            count[type]++;
+        }
+
+        sender.sendMessage(C.DARK_PURPLE + "-------------------------");
+        sender.sendMessage(C.DARK_PURPLE + "Status:");
+        sender.sendMessage(C.DARK_PURPLE + "- Service: " + C.LIGHT_PURPLE + (service.isShutdown() ? "Shutdown" : "Running"));
+        sender.sendMessage(C.DARK_PURPLE + "- Updater: " + C.LIGHT_PURPLE + (updateTicker.isAlive() ? "Running" : "Stopped"));
+        sender.sendMessage(C.DARK_PURPLE + "- Period: " + C.LIGHT_PURPLE + Form.duration(TRIM_PERIOD));
+        sender.sendMessage(C.DARK_PURPLE + "- Trimmers: " + C.LIGHT_PURPLE + trimmerAlive.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Unloaders: " + C.LIGHT_PURPLE + unloaderAlive.get());
+        sender.sendMessage(C.DARK_PURPLE + "Tectonic Plates:");
+        sender.sendMessage(C.DARK_PURPLE + "- Limit: " + C.LIGHT_PURPLE + tectonicLimit.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Total: " + C.LIGHT_PURPLE + tectonicPlates.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Queued: " + C.LIGHT_PURPLE + queuedTectonicPlates.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Max Idle Duration: " + C.LIGHT_PURPLE + Form.duration(maxIdleDuration.get(), 2));
+        sender.sendMessage(C.DARK_PURPLE + "- Min Idle Duration: " + C.LIGHT_PURPLE + Form.duration(minIdleDuration.get(), 2));
+        sender.sendMessage(C.DARK_PURPLE + "Caches:");
+        sender.sendMessage(C.DARK_PURPLE + "- Resource: " + C.LIGHT_PURPLE + sizes[0] + " (" + count[0] + ")");
+        sender.sendMessage(C.DARK_PURPLE + "- 2D Stream: " + C.LIGHT_PURPLE + sizes[1] + " (" + count[1] + ")");
+        sender.sendMessage(C.DARK_PURPLE + "- 3D Stream: " + C.LIGHT_PURPLE + sizes[2] + " (" + count[2] + ")");
+        sender.sendMessage(C.DARK_PURPLE + "- Other: " + C.LIGHT_PURPLE + sizes[3] + " (" + count[3] + ")");
+        sender.sendMessage(C.DARK_PURPLE + "Other:");
+        sender.sendMessage(C.DARK_PURPLE + "- Iris Worlds: " + C.LIGHT_PURPLE + totalWorlds.get());
+        sender.sendMessage(C.DARK_PURPLE + "- Loaded Chunks: " + C.LIGHT_PURPLE + loadedChunks.get());
+        sender.sendMessage(C.DARK_PURPLE + "-------------------------");
+    }
+
+    @EventHandler
+    public void onWorldUnload(WorldUnloadEvent event) {
+        remove(event.getWorld());
+    }
+
+    @EventHandler
+    public void onWorldLoad(WorldLoadEvent event) {
+        add(event.getWorld());
+    }
+
+    private void remove(World world) {
+        var entry = worlds.remove(world);
+        if (entry == null) return;
+        entry.close();
+    }
+
+    private void add(World world) {
+        if (world == null || worlds.containsKey(world)) return;
+        PlatformChunkGenerator access = IrisToolbelt.access(world);
+        if (access == null) return;
+        worlds.put(world, new Registered(world.getName(), access));
+    }
+
+    private synchronized void setup() {
+        if (updateTicker != null && updateTicker.isAlive())
+            return;
+
+        updateTicker = new Looper() {
+            @Override
+            protected long loop() {
+                try {
+                    for (World world : Bukkit.getWorlds()) {
+                        add(world);
+                    }
+
+                    int queuedPlates = 0;
+                    int totalPlates = 0;
+                    long chunks = 0;
+                    int unloaders = 0;
+                    int trimmers = 0;
+                    int iris = 0;
+
+                    double maxDuration = Long.MIN_VALUE;
+                    double minDuration = Long.MAX_VALUE;
+                    for (var entry : worlds.entrySet()) {
+                        var registered = entry.getValue();
+                        if (registered.closed) continue;
+
+                        iris++;
+                        if (registered.unloaderAlive()) unloaders++;
+                        if (registered.trimmerAlive()) trimmers++;
+
+                        var engine = registered.getEngine();
+                        if (engine == null) continue;
+
+                        queuedPlates += engine.getMantle().getUnloadRegionCount();
+                        totalPlates += engine.getMantle().getLoadedRegionCount();
+                        chunks += entry.getKey().getLoadedChunks().length;
+
+                        double duration = engine.getMantle().getAdjustedIdleDuration();
+                        if (duration > maxDuration) maxDuration = duration;
+                        if (duration < minDuration) minDuration = duration;
+                    }
+
+                    trimmerAlive.set(trimmers);
+                    unloaderAlive.set(unloaders);
+                    tectonicPlates.set(totalPlates);
+                    queuedTectonicPlates.set(queuedPlates);
+                    maxIdleDuration.set(maxDuration);
+                    minIdleDuration.set(minDuration);
+                    loadedChunks.set(chunks);
+                    totalWorlds.set(iris);
+
+                    worlds.values().forEach(Registered::update);
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                }
+                return 1000;
+            }
+        };
+        updateTicker.start();
+    }
+
+    private static boolean isMantleClosed(Throwable throwable) {
+        Throwable current = throwable;
+        while (current != null) {
+            String message = current.getMessage();
+            if (message != null && message.toLowerCase(Locale.ROOT).contains("mantle is closed")) {
+                return true;
+            }
+
+            current = current.getCause();
+        }
+
+        return false;
+    }
+
+    static boolean shouldSkipMantleReductionForMaintenance(boolean maintenanceActive, boolean pregeneratorTargetsWorld) {
+        return maintenanceActive && !pregeneratorTargetsWorld;
+    }
+
+    private final class Registered {
+        private final String name;
+        private final PlatformChunkGenerator access;
+        private final int offset = RNG.r.nextInt(TRIM_PERIOD);
+        private transient ScheduledFuture<?> trimmer;
+        private transient ScheduledFuture<?> unloader;
+        private transient boolean closed;
+
+        private Registered(String name, PlatformChunkGenerator access) {
+            this.name = name;
+            this.access = access;
+            update();
+        }
+
+        private boolean unloaderAlive() {
+            return unloader != null && !unloader.isDone() && !unloader.isCancelled();
+        }
+
+        private boolean trimmerAlive() {
+            return trimmer != null && !trimmer.isDone() && !trimmer.isCancelled();
+        }
+
+        @Synchronized
+        private void update() {
+            if (closed || service == null || service.isShutdown())
+                return;
+
+            if (trimmer == null || trimmer.isDone() || trimmer.isCancelled()) {
+                trimmer = service.scheduleAtFixedRate(() -> {
+                    Engine engine = getEngine();
+                    if (engine == null
+                            || engine.isClosed()
+                            || engine.getMantle().getMantle().isClosed()
+                            || !shouldReduce(engine))
+                        return;
+                    World engineWorld = engine.getWorld().realWorld();
+                    if (shouldSkipForMaintenance(engineWorld)) {
+                        return;
+                    }
+                    if (GoldenHashScanner.isScanActive()) {
+                        return;
+                    }
+
+                    try {
+                        if (pregenTargets(engine) && MantleHeapPressure.overHighWater()) {
+                            engine.getMantle().trim(0L, 0);
+                        } else {
+                            engine.getMantle().trim(activeIdleDuration(engine), activeTectonicLimit(engine));
+                        }
+                    } catch (Throwable e) {
+                        if (isMantleClosed(e)) {
+                            close();
+                            return;
+                        }
+                        IrisLogging.reportError(e);
+                        IrisLogging.error("EngineSVC: Failed to trim for " + name);
+                        e.printStackTrace();
+                    }
+                }, offset, TRIM_PERIOD, TimeUnit.MILLISECONDS);
+            }
+
+            if (unloader == null || unloader.isDone() || unloader.isCancelled()) {
+                unloader = service.scheduleAtFixedRate(() -> {
+                    Engine engine = getEngine();
+                    if (engine == null
+                            || engine.isClosed()
+                            || engine.getMantle().getMantle().isClosed()
+                            || !shouldReduce(engine))
+                        return;
+                    World engineWorld = engine.getWorld().realWorld();
+                    if (shouldSkipForMaintenance(engineWorld)) {
+                        return;
+                    }
+
+                    if (GoldenHashScanner.isScanActive()) {
+                        return;
+                    }
+
+                    try {
+                        long unloadStart = System.currentTimeMillis();
+                        boolean heapPressure = pregenTargets(engine) && MantleHeapPressure.overHighWater();
+                        int unloadLimit = (heapPressure || IrisSettings.get().getPerformance().getEngineSVC().forceMulticoreWrite) ? 0 : activeTectonicLimit(engine);
+                        int count = engine.getMantle().unloadTectonicPlate(unloadLimit);
+                        if (heapPressure && MantleHeapPressure.overPanicWater()) {
+                            MantleHeapPressure.requestPanicReclaim();
+                        }
+                        if (count > 0) {
+                            IrisLogging.debug(C.GOLD + "Unloaded " + C.YELLOW + count + " TectonicPlates in " + C.RED + Form.duration(System.currentTimeMillis() - unloadStart, 2));
+                        }
+                    } catch (Throwable e) {
+                        if (isMantleClosed(e)) {
+                            close();
+                            return;
+                        }
+                        IrisLogging.reportError(e);
+                        IrisLogging.error("EngineSVC: Failed to unload for " + name);
+                        e.printStackTrace();
+                    }
+                }, offset + TRIM_PERIOD / 2, TRIM_PERIOD, TimeUnit.MILLISECONDS);
+            }
+        }
+
+        private int tectonicLimit() {
+            return tectonicLimit.get() / Math.max(worlds.size(), 1);
+        }
+
+        private boolean pregenTargets(Engine engine) {
+            if (engine == null || engine.getWorld() == null) {
+                return false;
+            }
+
+            PregeneratorJob pregeneratorJob = PregeneratorJob.getInstance();
+            return pregeneratorJob != null && pregeneratorJob.targetsWorldIdentity(engine.getWorld().identity());
+        }
+
+        private int activeTectonicLimit(Engine engine) {
+            int limit = tectonicLimit();
+            if (!pregenTargets(engine)) {
+                return limit;
+            }
+
+            return Math.max(limit, IrisSettings.get().getPregen().getEffectiveResidentTectonicPlates(engine.getHeight()));
+        }
+
+        private long activeIdleDuration(Engine engine) {
+            return TimeUnit.SECONDS.toMillis(IrisSettings.get().getPerformance().getMantleKeepAlive());
+        }
+
+        @Synchronized
+        private void close() {
+            if (closed) return;
+            closed = true;
+
+            if (trimmer != null) {
+                trimmer.cancel(false);
+                trimmer = null;
+            }
+
+            if (unloader != null) {
+                unloader.cancel(false);
+                unloader = null;
+            }
+        }
+
+        @Nullable
+        private Engine getEngine() {
+            if (closed) return null;
+            return access.getEngine();
+        }
+
+        private boolean shouldReduce(Engine engine) {
+            if (!engine.isStudio() || IrisSettings.get().getPerformance().isTrimMantleInStudio()) {
+                return true;
+            }
+
+            return pregenTargets(engine);
+        }
+
+        private boolean shouldSkipForMaintenance(@Nullable World world) {
+            if (world == null) {
+                return false;
+            }
+
+            boolean maintenanceActive = IrisToolbelt.isWorldMaintenanceActive(world);
+            if (!maintenanceActive) {
+                return false;
+            }
+
+            PregeneratorJob pregeneratorJob = PregeneratorJob.getInstance();
+            boolean pregeneratorTargetsWorld = pregeneratorJob != null && pregeneratorJob.targetsWorld(world);
+            return shouldSkipMantleReductionForMaintenance(maintenanceActive, pregeneratorTargetsWorld);
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/IrisIntegrationService.java

@@ -0,0 +1,210 @@
+package art.arcane.iris.core.service;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.gui.PregeneratorJob;
+import art.arcane.iris.util.common.plugin.IrisService;
+import art.arcane.volmlib.integration.IntegrationHandshakeRequest;
+import art.arcane.volmlib.integration.IntegrationHandshakeResponse;
+import art.arcane.volmlib.integration.IntegrationHeartbeat;
+import art.arcane.volmlib.integration.IntegrationMetricDescriptor;
+import art.arcane.volmlib.integration.IntegrationMetricSample;
+import art.arcane.volmlib.integration.IntegrationMetricSchema;
+import art.arcane.volmlib.integration.IntegrationProtocolNegotiator;
+import art.arcane.volmlib.integration.IntegrationProtocolVersion;
+import art.arcane.volmlib.integration.IntegrationServiceContract;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.ServicePriority;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+
+public class IrisIntegrationService implements IrisService, IntegrationServiceContract {
+    private static final Set<IntegrationProtocolVersion> SUPPORTED_PROTOCOLS = Set.of(
+            new IntegrationProtocolVersion(1, 0),
+            new IntegrationProtocolVersion(1, 1)
+    );
+
+    private static final Set<String> CAPABILITIES = Set.of(
+            "handshake",
+            "heartbeat",
+            "metrics",
+            "iris-engine-metrics"
+    );
+
+    private volatile IntegrationProtocolVersion negotiatedProtocol = new IntegrationProtocolVersion(1, 1);
+
+    @Override
+    public void onEnable() {
+        Bukkit.getServicesManager().register(IntegrationServiceContract.class, this, Iris.instance, ServicePriority.Normal);
+        Iris.verbose("Integration provider registered for Iris");
+    }
+
+    @Override
+    public void onDisable() {
+        Bukkit.getServicesManager().unregister(IntegrationServiceContract.class, this);
+    }
+
+    @Override
+    public String pluginId() {
+        return "iris";
+    }
+
+    @Override
+    public String pluginVersion() {
+        return Iris.instance.getDescription().getVersion();
+    }
+
+    @Override
+    public Set<IntegrationProtocolVersion> supportedProtocols() {
+        return SUPPORTED_PROTOCOLS;
+    }
+
+    @Override
+    public Set<String> capabilities() {
+        return CAPABILITIES;
+    }
+
+    @Override
+    public Set<IntegrationMetricDescriptor> metricDescriptors() {
+        return IntegrationMetricSchema.descriptors().stream()
+                .filter(descriptor -> descriptor.key().startsWith("iris."))
+                .collect(java.util.stream.Collectors.toSet());
+    }
+
+    @Override
+    public IntegrationHandshakeResponse handshake(IntegrationHandshakeRequest request) {
+        long now = System.currentTimeMillis();
+        if (request == null) {
+            return new IntegrationHandshakeResponse(
+                    pluginId(),
+                    pluginVersion(),
+                    false,
+                    null,
+                    SUPPORTED_PROTOCOLS,
+                    CAPABILITIES,
+                    "missing request",
+                    now
+            );
+        }
+
+        Optional<IntegrationProtocolVersion> negotiated = IntegrationProtocolNegotiator.negotiate(
+                SUPPORTED_PROTOCOLS,
+                request.supportedProtocols()
+        );
+        if (negotiated.isEmpty()) {
+            return new IntegrationHandshakeResponse(
+                    pluginId(),
+                    pluginVersion(),
+                    false,
+                    null,
+                    SUPPORTED_PROTOCOLS,
+                    CAPABILITIES,
+                    "no-common-protocol",
+                    now
+            );
+        }
+
+        negotiatedProtocol = negotiated.get();
+        return new IntegrationHandshakeResponse(
+                pluginId(),
+                pluginVersion(),
+                true,
+                negotiatedProtocol,
+                SUPPORTED_PROTOCOLS,
+                CAPABILITIES,
+                "ok",
+                now
+        );
+    }
+
+    @Override
+    public IntegrationHeartbeat heartbeat() {
+        long now = System.currentTimeMillis();
+        return new IntegrationHeartbeat(negotiatedProtocol, true, now, "ok");
+    }
+
+    @Override
+    public Map<String, IntegrationMetricSample> sampleMetrics(Set<String> metricKeys) {
+        Set<String> requested = metricKeys == null || metricKeys.isEmpty()
+                ? IntegrationMetricSchema.irisKeys()
+                : metricKeys;
+        long now = System.currentTimeMillis();
+        Map<String, IntegrationMetricSample> out = new HashMap<>();
+
+        for (String key : requested) {
+            switch (key) {
+                case IntegrationMetricSchema.IRIS_CHUNK_STREAM_MS -> out.put(key, sampleChunkStreamMetric(now));
+                case IntegrationMetricSchema.IRIS_PREGEN_QUEUE -> out.put(key, samplePregenQueueMetric(now));
+                case IntegrationMetricSchema.IRIS_BIOME_CACHE_HIT_RATE -> out.put(key, sampleBiomeCacheHitRateMetric(now));
+                default -> out.put(key, IntegrationMetricSample.unavailable(
+                        IntegrationMetricSchema.descriptor(key),
+                        "unsupported-key",
+                        now
+                ));
+            }
+        }
+
+        return out;
+    }
+
+    private IntegrationMetricSample sampleChunkStreamMetric(long now) {
+        IntegrationMetricDescriptor descriptor = IntegrationMetricSchema.descriptor(IntegrationMetricSchema.IRIS_CHUNK_STREAM_MS);
+
+        double chunksPerSecond = PregeneratorJob.chunksPerSecond();
+
+        if (chunksPerSecond > 0D) {
+            return IntegrationMetricSample.available(descriptor, 1000D / chunksPerSecond, now);
+        }
+
+        IrisEngineSVC engineService = Iris.service(IrisEngineSVC.class);
+        if (engineService != null) {
+            double idle = engineService.getAverageIdleDuration();
+            if (idle > 0D && Double.isFinite(idle)) {
+                return IntegrationMetricSample.available(descriptor, idle, now);
+            }
+        }
+
+        return IntegrationMetricSample.available(descriptor, 0D, now);
+    }
+
+    private IntegrationMetricSample samplePregenQueueMetric(long now) {
+        IntegrationMetricDescriptor descriptor = IntegrationMetricSchema.descriptor(IntegrationMetricSchema.IRIS_PREGEN_QUEUE);
+        long totalQueue = 0L;
+        boolean hasAnySource = false;
+
+        long pregenRemaining = PregeneratorJob.chunksRemaining();
+        if (pregenRemaining >= 0L) {
+            totalQueue += pregenRemaining;
+            hasAnySource = true;
+        }
+
+        IrisEngineSVC engineService = Iris.service(IrisEngineSVC.class);
+        if (engineService != null) {
+            totalQueue += Math.max(0, engineService.getQueuedTectonicPlateCount());
+            hasAnySource = true;
+        }
+
+        if (!hasAnySource) {
+            return IntegrationMetricSample.unavailable(descriptor, "queue-not-available", now);
+        }
+
+        return IntegrationMetricSample.available(descriptor, totalQueue, now);
+    }
+
+    private IntegrationMetricSample sampleBiomeCacheHitRateMetric(long now) {
+        IntegrationMetricDescriptor descriptor = IntegrationMetricSchema.descriptor(IntegrationMetricSchema.IRIS_BIOME_CACHE_HIT_RATE);
+        IrisEngineSVC engineService = Iris.service(IrisEngineSVC.class);
+        if (engineService == null) {
+            return IntegrationMetricSample.unavailable(descriptor, "engine-service-unavailable", now);
+        }
+
+        double ratio = engineService.getBiomeCacheUsageRatio();
+        if (!Double.isFinite(ratio)) {
+            return IntegrationMetricSample.unavailable(descriptor, "biome-cache-ratio-invalid", now);
+        }
+
+        return IntegrationMetricSample.available(descriptor, Math.max(0D, Math.min(1D, ratio)), now);
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/IrisProtocolService.java

@@ -0,0 +1,209 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.service;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.protocol.EngineResolver;
+import art.arcane.iris.core.protocol.IrisProtocolServer;
+import art.arcane.iris.core.protocol.IrisServerTransport;
+import art.arcane.iris.core.protocol.IrisSession;
+import art.arcane.iris.core.protocol.IrisSessionRegistry;
+import art.arcane.iris.core.protocol.IrisVisionRequestService;
+import art.arcane.iris.core.tools.IrisToolbelt;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.platform.PlatformChunkGenerator;
+import art.arcane.iris.spi.IrisServices;
+import art.arcane.iris.spi.protocol.IrisProtocol;
+import art.arcane.iris.util.common.plugin.IrisService;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.bukkit.WorldIdentity;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.plugin.messaging.Messenger;
+import org.bukkit.plugin.messaging.PluginMessageListener;
+
+import java.util.UUID;
+
+public class IrisProtocolService implements IrisService, PluginMessageListener, IrisServerTransport {
+    private static final long SERVER_CAPABILITIES = IrisProtocol.CAPABILITY_PREGEN | IrisProtocol.CAPABILITY_VISION | IrisProtocol.CAPABILITY_CURSOR;
+    private static final int DIMENSION_SYNC_RETRY_TICKS = 20;
+    private static final int DIMENSION_SYNC_MAX_ATTEMPTS = 15;
+
+    private IrisSessionRegistry registry;
+    private IrisProtocolServer protocolServer;
+
+    @Override
+    public void onEnable() {
+        Messenger messenger = Bukkit.getMessenger();
+        messenger.registerOutgoingPluginChannel(Iris.instance, IrisProtocol.CHANNEL);
+        messenger.registerIncomingPluginChannel(Iris.instance, IrisProtocol.CHANNEL, this);
+        registry = new IrisSessionRegistry();
+        protocolServer = new IrisProtocolServer(registry, SERVER_CAPABILITIES, brand(), true);
+        EngineResolver engineResolver = IrisProtocolService::resolveEngine;
+        protocolServer.setEngineResolver(engineResolver);
+        protocolServer.setVisionTileHandler(IrisVisionRequestService.create(engineResolver, registry));
+        IrisServices.register(IrisProtocolServer.class, protocolServer);
+        for (Player player : Bukkit.getOnlinePlayers()) {
+            registry.register(new IrisSession(player.getUniqueId().toString(), this));
+        }
+    }
+
+    @Override
+    public void onDisable() {
+        IrisServices.remove(IrisProtocolServer.class);
+        Messenger messenger = Bukkit.getMessenger();
+        messenger.unregisterIncomingPluginChannel(Iris.instance, IrisProtocol.CHANNEL, this);
+        messenger.unregisterOutgoingPluginChannel(Iris.instance, IrisProtocol.CHANNEL);
+        IrisSessionRegistry current = registry;
+        if (current != null) {
+            for (IrisSession session : current.all()) {
+                current.unregister(session.id());
+            }
+        }
+        registry = null;
+        protocolServer = null;
+    }
+
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        IrisSessionRegistry current = registry;
+        if (current == null) {
+            return;
+        }
+        current.register(new IrisSession(event.getPlayer().getUniqueId().toString(), this));
+        syncDimension(event.getPlayer(), DIMENSION_SYNC_MAX_ATTEMPTS);
+    }
+
+    @EventHandler
+    public void onPlayerChangedWorld(PlayerChangedWorldEvent event) {
+        if (registry == null) {
+            return;
+        }
+        syncDimension(event.getPlayer(), 1);
+    }
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        IrisSessionRegistry current = registry;
+        if (current == null) {
+            return;
+        }
+        current.unregister(event.getPlayer().getUniqueId().toString());
+    }
+
+    @Override
+    public void onPluginMessageReceived(String channel, Player player, byte[] message) {
+        IrisProtocolServer current = protocolServer;
+        if (current == null || !IrisProtocol.CHANNEL.equals(channel)) {
+            return;
+        }
+        current.onClientFrame(player.getUniqueId().toString(), message);
+    }
+
+    @Override
+    public void sendToClient(String sessionId, byte[] frame) {
+        if (sessionId == null || frame == null) {
+            return;
+        }
+        UUID playerId = parseUuid(sessionId);
+        if (playerId == null) {
+            return;
+        }
+        Player player = Bukkit.getPlayer(playerId);
+        if (player == null || !player.isOnline()) {
+            return;
+        }
+        J.runEntity(player, () -> deliver(player, frame));
+    }
+
+    private void deliver(Player player, byte[] frame) {
+        if (!player.isOnline() || !player.getListeningPluginChannels().contains(IrisProtocol.CHANNEL)) {
+            return;
+        }
+        player.sendPluginMessage(Iris.instance, IrisProtocol.CHANNEL, frame);
+    }
+
+    private void syncDimension(Player player, int attemptsLeft) {
+        IrisProtocolServer protocol = protocolServer;
+        IrisSessionRegistry current = registry;
+        if (protocol == null || current == null || !player.isOnline()) {
+            return;
+        }
+        String sessionId = player.getUniqueId().toString();
+        IrisSession session = current.get(sessionId);
+        if (session == null) {
+            return;
+        }
+        if (!session.isReady()) {
+            if (attemptsLeft > 1) {
+                J.runEntity(player, () -> syncDimension(player, attemptsLeft - 1), DIMENSION_SYNC_RETRY_TICKS);
+            }
+            return;
+        }
+        World world = player.getWorld();
+        Engine engine = engineFor(world);
+        if (engine != null) {
+            protocol.sendDimensionStatus(sessionId, engine.getDimension().getLoadKey(), engine.getData().getDataFolder().getName(),
+                    world.getSeed(), engine.getMinHeight(), engine.getMaxHeight(), true);
+            return;
+        }
+        protocol.sendDimensionStatus(sessionId, WorldIdentity.serialize(world), "", world.getSeed(), world.getMinHeight(), world.getMaxHeight(), false);
+    }
+
+    private static Engine resolveEngine(String sessionId) {
+        UUID playerId = parseUuid(sessionId);
+        if (playerId == null) {
+            return null;
+        }
+        Player player = Bukkit.getPlayer(playerId);
+        if (player == null || !player.isOnline()) {
+            return null;
+        }
+        return engineFor(player.getWorld());
+    }
+
+    private static Engine engineFor(World world) {
+        PlatformChunkGenerator access = IrisToolbelt.access(world);
+        if (access == null) {
+            return null;
+        }
+        Engine engine = access.getEngine();
+        if (engine == null || engine.isClosed()) {
+            return null;
+        }
+        return engine;
+    }
+
+    private static UUID parseUuid(String sessionId) {
+        try {
+            return UUID.fromString(sessionId);
+        } catch (IllegalArgumentException invalid) {
+            return null;
+        }
+    }
+
+    private static String brand() {
+        return "Iris " + Iris.instance.getDescription().getVersion() + " (Bukkit)";
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/PaperCommandRegistrar.java

@@ -0,0 +1,49 @@
+package art.arcane.iris.core.service;
+
+import art.arcane.iris.Iris;
+import io.papermc.paper.command.brigadier.BasicCommand;
+import io.papermc.paper.command.brigadier.CommandSourceStack;
+import io.papermc.paper.plugin.lifecycle.event.types.LifecycleEvents;
+import org.bukkit.command.CommandSender;
+
+import java.util.Collection;
+import java.util.List;
+
+final class PaperCommandRegistrar {
+    private static final String ROOT_COMMAND = "iris";
+
+    private PaperCommandRegistrar() {
+    }
+
+    static void register(Iris plugin, CommandSVC commandService) {
+        plugin.getLifecycleManager().registerEventHandler(LifecycleEvents.COMMANDS, event ->
+                event.registrar().register(
+                        ROOT_COMMAND,
+                        "Iris world generation command.",
+                        List.of("ir", "irs"),
+                        command(commandService)
+                )
+        );
+    }
+
+    static BasicCommand command(CommandSVC commandService) {
+        return new PaperCommand(commandService);
+    }
+
+    private record PaperCommand(CommandSVC commandService) implements BasicCommand {
+        @Override
+        public void execute(CommandSourceStack source, String[] args) {
+            commandService.executeRoot(source.getSender(), ROOT_COMMAND, args);
+        }
+
+        @Override
+        public Collection<String> suggest(CommandSourceStack source, String[] args) {
+            return commandService.tabCompleteRoot(source.getSender(), ROOT_COMMAND, args);
+        }
+
+        @Override
+        public boolean canUse(CommandSender sender) {
+            return true;
+        }
+    }
+}

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/service/WandSVC.java

@@ -16,29 +16,33 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.volmit.iris.core.service;
+package art.arcane.iris.core.service;
 
-import com.volmit.iris.Iris;
-import com.volmit.iris.core.IrisSettings;
-import com.volmit.iris.core.edit.DustRevealer;
-import com.volmit.iris.core.link.WorldEditLink;
-import com.volmit.iris.core.wand.WandSelection;
-import com.volmit.iris.engine.object.IrisObject;
-import com.volmit.iris.util.collection.KList;
-import com.volmit.iris.util.data.Cuboid;
-import com.volmit.iris.util.format.C;
-import com.volmit.iris.util.math.M;
-import com.volmit.iris.util.matter.Matter;
-import com.volmit.iris.util.matter.WorldMatter;
-import com.volmit.iris.util.plugin.IrisService;
-import com.volmit.iris.util.plugin.VolmitSender;
-import com.volmit.iris.util.scheduling.J;
 import org.bukkit.Bukkit;
+import org.bukkit.Chunk;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.Particle;
 import org.bukkit.Sound;
-import org.bukkit.block.Block;
+import org.bukkit.World;
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.iris.core.edit.DustRevealer;
+import art.arcane.iris.core.link.WorldEditLink;
+import art.arcane.iris.core.wand.WandSelection;
+import art.arcane.iris.engine.object.IrisObject;
+import art.arcane.iris.util.project.matter.WorldMatter;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.volmlib.util.bukkit.WorldIdentity;
+import art.arcane.volmlib.util.data.Cuboid;
+import art.arcane.iris.util.common.format.C;
+import art.arcane.volmlib.util.math.M;
+import art.arcane.volmlib.util.matter.Matter;
+import art.arcane.iris.util.common.plugin.IrisService;
+import art.arcane.iris.util.common.plugin.VolmitSender;
+import art.arcane.iris.util.common.scheduling.J;
+import art.arcane.volmlib.util.scheduling.SR;
+import art.arcane.iris.util.common.scheduling.jobs.Job;
 import org.bukkit.enchantments.Enchantment;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
@@ -55,9 +59,16 @@ import org.bukkit.util.Vector;
 import java.awt.Color;
 import java.util.ArrayList;
 import java.util.Objects;
+import java.util.concurrent.CountDownLatch;
+
+import static art.arcane.iris.util.common.data.registry.Particles.CRIT_MAGIC;
+import static art.arcane.iris.util.common.data.registry.Particles.REDSTONE;
 
 public class WandSVC implements IrisService {
+    private static final int MS_PER_TICK = Integer.parseInt(System.getProperty("iris.ms_per_tick", "30"));
+
     private static ItemStack dust;
+    private static ItemStack wand;
 
     public static void pasteSchematic(IrisObject s, Location at) {
         s.place(at);
@@ -66,30 +77,100 @@ public class WandSVC implements IrisService {
     /**
      * Creates an Iris Object from the 2 coordinates selected with a wand
      *
-     * @param p
-     *     The wand player
+     * @param p The wand player
      * @return The new object
      */
-    public static IrisObject createSchematic(Player p) {
-        if(!isHoldingWand(p)) {
+    public static IrisObject createSchematic(Player p, boolean legacy) {
+        if (!isHoldingWand(p)) {
             return null;
         }
 
         try {
             Location[] f = getCuboid(p);
+            if (f == null || f[0] == null || f[1] == null)
+                return null;
             Cuboid c = new Cuboid(f[0], f[1]);
             IrisObject s = new IrisObject(c.getSizeX(), c.getSizeY(), c.getSizeZ());
-            for(Block b : c) {
-                if(b.getType().equals(Material.AIR)) {
-                    continue;
+
+            var it = c.chunkedIterator();
+
+            int total = c.getSizeX() * c.getSizeY() * c.getSizeZ();
+            var latch = new CountDownLatch(1);
+            var holder = Iris.tickets.getHolder(p.getWorld());
+            new Job() {
+                private int i;
+                private Chunk chunk;
+
+                @Override
+                public String getName() {
+                    return "Scanning Selection";
                 }
 
-                BlockVector bv = b.getLocation().subtract(c.getLowerNE().toVector()).toVector().toBlockVector();
-                s.setUnsigned(bv.getBlockX(), bv.getBlockY(), bv.getBlockZ(), b);
-            }
+                @Override
+                public void execute() {
+                    new SR() {
+                        @Override
+                        public void run() {
+                            var time = M.ms() + MS_PER_TICK;
+                            while (time > M.ms()) {
+                                if (!it.hasNext()) {
+                                    if (chunk != null) {
+                                        holder.removeTicket(chunk);
+                                        chunk = null;
+                                    }
+
+                                    cancel();
+                                    latch.countDown();
+                                    return;
+                                }
+
+                                try {
+                                    var b = it.next();
+                                    var bChunk = b.getChunk();
+                                    if (chunk == null) {
+                                        chunk = bChunk;
+                                        holder.addTicket(chunk);
+                                    } else if (chunk != bChunk) {
+                                        holder.removeTicket(chunk);
+                                        holder.addTicket(bChunk);
+                                        chunk = bChunk;
+                                    }
+
+                                    if (b.getType().equals(Material.AIR))
+                                        continue;
+
+                                    BlockVector bv = b.getLocation().subtract(c.getLowerNE().toVector()).toVector().toBlockVector();
+                                    s.setUnsigned(bv.getBlockX(), bv.getBlockY(), bv.getBlockZ(), b, legacy);
+                                } finally {
+                                    i++;
+                                }
+                            }
+                        }
+                    };
+                    try {
+                        latch.await();
+                    } catch (InterruptedException ignored) {}
+                }
+
+                @Override
+                public void completeWork() {}
+
+                @Override
+                public int getTotalWork() {
+                    return total;
+                }
+
+                @Override
+                public int getWorkCompleted() {
+                    return i;
+                }
+            }.execute(new VolmitSender(p), true, () -> {});
+            try {
+                latch.await();
+            } catch (InterruptedException ignored) {}
 
             return s;
-        } catch(Throwable e) {
+        } catch (Throwable e) {
             e.printStackTrace();
             Iris.reportError(e);
         }
@@ -103,7 +184,7 @@ public class WandSVC implements IrisService {
      * @return The new object
      */
     public static Matter createMatterSchem(Player p) {
-        if(!isHoldingWand(p)) {
+        if (!isHoldingWand(p)) {
             return null;
         }
 
@@ -111,7 +192,7 @@ public class WandSVC implements IrisService {
             Location[] f = getCuboid(p);
 
             return WorldMatter.createMatter(p.getName(), f[0], f[1]);
-        } catch(Throwable e) {
+        } catch (Throwable e) {
             e.printStackTrace();
             Iris.reportError(e);
         }
@@ -122,16 +203,19 @@ public class WandSVC implements IrisService {
     /**
      * Converts a user friendly location string to an actual Location
      *
-     * @param s
-     *     The string
+     * @param s The string
      * @return The location
      */
     public static Location stringToLocation(String s) {
         try {
             String[] f = s.split("\\Q in \\E");
+            if (f.length != 2) return null;
             String[] g = f[0].split("\\Q,\\E");
-            return new Location(Bukkit.getWorld(f[1]), Integer.parseInt(g[0]), Integer.parseInt(g[1]), Integer.parseInt(g[2]));
-        } catch(Throwable e) {
+            if (g.length != 3) return null;
+            World world = WorldIdentity.resolve(f[1]).orElse(null);
+            if (world == null) return null;
+            return new Location(world, Integer.parseInt(g[0]), Integer.parseInt(g[1]), Integer.parseInt(g[2]));
+        } catch (Throwable e) {
             Iris.reportError(e);
             return null;
         }
@@ -140,16 +224,15 @@ public class WandSVC implements IrisService {
     /**
      * Get a user friendly string of a location
      *
-     * @param loc
-     *     The location
+     * @param loc The location
      * @return The string
      */
     public static String locationToString(Location loc) {
-        if(loc == null) {
+        if (loc == null) {
             return "<#>";
         }
 
-        return loc.getBlockX() + "," + loc.getBlockY() + "," + loc.getBlockZ() + " in " + loc.getWorld().getName();
+        return loc.getBlockX() + "," + loc.getBlockY() + "," + loc.getBlockZ() + " in " + WorldIdentity.serialize(loc.getWorld());
     }
 
     /**
@@ -168,11 +251,11 @@ public class WandSVC implements IrisService {
      */
     public static ItemStack createDust() {
         ItemStack is = new ItemStack(Material.GLOWSTONE_DUST);
-        is.addUnsafeEnchantment(Enchantment.ARROW_INFINITE, 1);
+        is.addUnsafeEnchantment(Enchantment.FIRE_ASPECT, 1);
         ItemMeta im = is.getItemMeta();
         im.setDisplayName(C.BOLD + "" + C.YELLOW + "Dust of Revealing");
         im.setUnbreakable(true);
-        im.addItemFlags(ItemFlag.HIDE_ATTRIBUTES, ItemFlag.HIDE_PLACED_ON, ItemFlag.HIDE_POTION_EFFECTS, ItemFlag.HIDE_DESTROYS, ItemFlag.HIDE_ENCHANTS);
+        im.addItemFlags(ItemFlag.values());
         im.setLore(new KList<String>().qadd("Right click on a block to reveal it's placement structure!"));
         is.setItemMeta(im);
 
@@ -182,8 +265,7 @@ public class WandSVC implements IrisService {
     /**
      * Finds an existing wand in a users inventory
      *
-     * @param inventory
-     *     The inventory to search
+     * @param inventory The inventory to search
      * @return The slot number the wand is in. Or -1 if none are found
      */
     public static int findWand(Inventory inventory) {
@@ -192,14 +274,14 @@ public class WandSVC implements IrisService {
         meta.setLore(new ArrayList<>()); //We are resetting the lore as the lore differs between wands
         wand.setItemMeta(meta);
 
-        for(int s = 0; s < inventory.getSize(); s++) {
+        for (int s = 0; s < inventory.getSize(); s++) {
             ItemStack stack = inventory.getItem(s);
-            if(stack == null) continue;
+            if (stack == null) continue;
             meta = stack.getItemMeta();
             meta.setLore(new ArrayList<>()); //Reset the lore on this too so we can compare them
             stack.setItemMeta(meta);         //We dont need to clone the item as items from .get are cloned
 
-            if(wand.isSimilar(stack)) return s; //If the name, material and NBT is the same
+            if (wand.isSimilar(stack)) return s; //If the name, material and NBT is the same
         }
         return -1;
     }
@@ -207,19 +289,17 @@ public class WandSVC implements IrisService {
     /**
      * Creates an Iris wand. The locations should be the currently selected locations, or null
      *
-     * @param a
-     *     Location A
-     * @param b
-     *     Location B
+     * @param a Location A
+     * @param b Location B
      * @return A new wand
      */
     public static ItemStack createWand(Location a, Location b) {
         ItemStack is = new ItemStack(Material.BLAZE_ROD);
-        is.addUnsafeEnchantment(Enchantment.ARROW_INFINITE, 1);
+        is.addUnsafeEnchantment(Enchantment.FIRE_ASPECT, 1);
         ItemMeta im = is.getItemMeta();
         im.setDisplayName(C.BOLD + "" + C.GOLD + "Wand of Iris");
         im.setUnbreakable(true);
-        im.addItemFlags(ItemFlag.HIDE_ATTRIBUTES, ItemFlag.HIDE_PLACED_ON, ItemFlag.HIDE_POTION_EFFECTS, ItemFlag.HIDE_DESTROYS, ItemFlag.HIDE_ENCHANTS);
+        im.addItemFlags(ItemFlag.values());
         im.setLore(new KList<String>().add(locationToString(a), locationToString(b)));
         is.setItemMeta(im);
 
@@ -228,27 +308,27 @@ public class WandSVC implements IrisService {
 
     public static Location[] getCuboidFromItem(ItemStack is) {
         ItemMeta im = is.getItemMeta();
-        return new Location[] {stringToLocation(im.getLore().get(0)), stringToLocation(im.getLore().get(1))};
+        return new Location[]{stringToLocation(im.getLore().get(0)), stringToLocation(im.getLore().get(1))};
     }
 
     public static Location[] getCuboid(Player p) {
-        if(isHoldingIrisWand(p))
-        {
+        if (isHoldingIrisWand(p)) {
             return getCuboidFromItem(p.getInventory().getItemInMainHand());
         }
 
-        Cuboid c = WorldEditLink.getSelection(p);
+        if (IrisSettings.get().getWorld().worldEditWandCUI) {
+            Cuboid c = WorldEditLink.getSelection(p);
 
-        if(c != null)
-        {
-            return new Location[] {c.getLowerNE(), c.getUpperSW()};
+            if (c != null) {
+                return new Location[]{c.getLowerNE(), c.getUpperSW()};
+            }
         }
 
         return null;
     }
 
     public static boolean isHoldingWand(Player p) {
-        return isHoldingIrisWand(p) || WorldEditLink.getSelection(p) != null;
+        return isHoldingIrisWand(p) || (IrisSettings.get().getWorld().worldEditWandCUI && WorldEditLink.getSelection(p) != null);
     }
 
     public static boolean isHoldingIrisWand(Player p) {
@@ -259,26 +339,24 @@ public class WandSVC implements IrisService {
     /**
      * Is the itemstack passed an Iris wand
      *
-     * @param is
-     *     The itemstack
+     * @param is The itemstack
      * @return True if it is
      */
     public static boolean isWand(ItemStack is) {
-        ItemStack wand = createWand();
-        if(is.getItemMeta() == null) return false;
+        if (is.getItemMeta() == null) return false;
         return is.getType().equals(wand.getType()) &&
-            is.getItemMeta().getDisplayName().equals(wand.getItemMeta().getDisplayName()) &&
-            is.getItemMeta().getEnchants().equals(wand.getItemMeta().getEnchants()) &&
-            is.getItemMeta().getItemFlags().equals(wand.getItemMeta().getItemFlags());
+                is.getItemMeta().getDisplayName().equals(wand.getItemMeta().getDisplayName()) &&
+                is.getItemMeta().getEnchants().equals(wand.getItemMeta().getEnchants()) &&
+                is.getItemMeta().getItemFlags().equals(wand.getItemMeta().getItemFlags());
     }
 
     @Override
     public void onEnable() {
-        ItemStack wand = createWand();
+        wand = createWand();
         dust = createDust();
 
         J.ar(() -> {
-            for(Player i : Bukkit.getOnlinePlayers()) {
+            for (Player i : Bukkit.getOnlinePlayers()) {
                 tick(i);
             }
         }, 0);
@@ -292,14 +370,15 @@ public class WandSVC implements IrisService {
     public void tick(Player p) {
         try {
             try {
-                if((IrisSettings.get().getWorld().worldEditWandCUI && isHoldingWand(p)) || isWand(p.getInventory().getItemInMainHand())) {
+                if ((IrisSettings.get().getWorld().worldEditWandCUI && isHoldingWand(p)) || isWand(p.getInventory().getItemInMainHand())) {
                     Location[] d = getCuboid(p);
+                    if (d == null || d[0] == null || d[1] == null) return;
                     new WandSelection(new Cuboid(d[0], d[1]), p).draw();
                 }
-            } catch(Throwable e) {
+            } catch (Throwable e) {
                 Iris.reportError(e);
             }
-        } catch(Throwable e) {
+        } catch (Throwable e) {
             e.printStackTrace();
         }
     }
@@ -307,34 +386,30 @@ public class WandSVC implements IrisService {
     /**
      * Draw the outline of a selected region
      *
-     * @param d
-     *     The cuboid
-     * @param p
-     *     The player to show it to
+     * @param d The cuboid
+     * @param p The player to show it to
      */
     public void draw(Cuboid d, Player p) {
-        draw(new Location[] {d.getLowerNE(), d.getUpperSW()}, p);
+        draw(new Location[]{d.getLowerNE(), d.getUpperSW()}, p);
     }
 
     /**
      * Draw the outline of a selected region
      *
-     * @param d
-     *     A pair of locations
-     * @param p
-     *     The player to show them to
+     * @param d A pair of locations
+     * @param p The player to show them to
      */
     public void draw(Location[] d, Player p) {
         Vector gx = Vector.getRandom().subtract(Vector.getRandom()).normalize().clone().multiply(0.65);
-        d[0].getWorld().spawnParticle(Particle.CRIT_MAGIC, d[0], 1, 0.5 + gx.getX(), 0.5 + gx.getY(), 0.5 + gx.getZ(), 0, null, false);
+        d[0].getWorld().spawnParticle(CRIT_MAGIC, d[0], 1, 0.5 + gx.getX(), 0.5 + gx.getY(), 0.5 + gx.getZ(), 0, null, false);
         Vector gxx = Vector.getRandom().subtract(Vector.getRandom()).normalize().clone().multiply(0.65);
-        d[1].getWorld().spawnParticle(Particle.CRIT, d[1], 1, 0.5 + gxx.getX(), 0.5 + gxx.getY(), 0.5 + gxx.getZ(), 0, null, false);
+        d[1].getWorld().spawnParticle(CRIT_MAGIC, d[1], 1, 0.5 + gxx.getX(), 0.5 + gxx.getY(), 0.5 + gxx.getZ(), 0, null, false);
 
-        if(!d[0].getWorld().equals(d[1].getWorld())) {
+        if (!d[0].getWorld().equals(d[1].getWorld())) {
             return;
         }
 
-        if(d[0].distanceSquared(d[1]) > 64 * 64) {
+        if (d[0].distanceSquared(d[1]) > 64 * 64) {
             return;
         }
 
@@ -345,38 +420,38 @@ public class WandSVC implements IrisService {
         int maxy = Math.max(d[0].getBlockY(), d[1].getBlockY());
         int maxz = Math.max(d[0].getBlockZ(), d[1].getBlockZ());
 
-        for(double j = minx - 1; j < maxx + 1; j += 0.25) {
-            for(double k = miny - 1; k < maxy + 1; k += 0.25) {
-                for(double l = minz - 1; l < maxz + 1; l += 0.25) {
-                    if(M.r(0.2)) {
+        for (double j = minx - 1; j < maxx + 1; j += 0.25) {
+            for (double k = miny - 1; k < maxy + 1; k += 0.25) {
+                for (double l = minz - 1; l < maxz + 1; l += 0.25) {
+                    if (M.r(0.2)) {
                         boolean jj = j == minx || j == maxx;
                         boolean kk = k == miny || k == maxy;
                         boolean ll = l == minz || l == maxz;
 
-                        if((jj && kk) || (jj && ll) || (ll && kk)) {
+                        if ((jj && kk) || (jj && ll) || (ll && kk)) {
                             Vector push = new Vector(0, 0, 0);
 
-                            if(j == minx) {
+                            if (j == minx) {
                                 push.add(new Vector(-0.55, 0, 0));
                             }
 
-                            if(k == miny) {
+                            if (k == miny) {
                                 push.add(new Vector(0, -0.55, 0));
                             }
 
-                            if(l == minz) {
+                            if (l == minz) {
                                 push.add(new Vector(0, 0, -0.55));
                             }
 
-                            if(j == maxx) {
+                            if (j == maxx) {
                                 push.add(new Vector(0.55, 0, 0));
                             }
 
-                            if(k == maxy) {
+                            if (k == maxy) {
                                 push.add(new Vector(0, 0.55, 0));
                             }
 
-                            if(l == maxz) {
+                            if (l == maxz) {
                                 push.add(new Vector(0, 0, 0.55));
                             }
 
@@ -385,7 +460,7 @@ public class WandSVC implements IrisService {
                             int r = color.getRed();
                             int g = color.getGreen();
                             int b = color.getBlue();
-                            p.spawnParticle(Particle.REDSTONE, lv.getX(), lv.getY(), lv.getZ(), 1, 0, 0, 0, 0, new Particle.DustOptions(org.bukkit.Color.fromRGB(r, g, b), 0.75f));
+                            p.spawnParticle(REDSTONE, lv.getX(), lv.getY(), lv.getZ(), 1, 0, 0, 0, 0, new Particle.DustOptions(org.bukkit.Color.fromRGB(r, g, b), 0.75f));
                         }
                     }
                 }
@@ -395,16 +470,16 @@ public class WandSVC implements IrisService {
 
     @EventHandler
     public void on(PlayerInteractEvent e) {
-        if(e.getHand() != EquipmentSlot.HAND)
+        if (e.getHand() != EquipmentSlot.HAND)
             return;
         try {
-            if(isHoldingWand(e.getPlayer())) {
-                if(e.getAction().equals(Action.LEFT_CLICK_BLOCK)) {
+            if (isHoldingIrisWand(e.getPlayer())) {
+                if (e.getAction().equals(Action.LEFT_CLICK_BLOCK)) {
                     e.setCancelled(true);
                     e.getPlayer().getInventory().setItemInMainHand(update(true, Objects.requireNonNull(e.getClickedBlock()).getLocation(), e.getPlayer().getInventory().getItemInMainHand()));
                     e.getPlayer().playSound(e.getClickedBlock().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1f, 0.67f);
                     e.getPlayer().updateInventory();
-                } else if(e.getAction().equals(Action.RIGHT_CLICK_BLOCK)) {
+                } else if (e.getAction().equals(Action.RIGHT_CLICK_BLOCK)) {
                     e.setCancelled(true);
                     e.getPlayer().getInventory().setItemInMainHand(update(false, Objects.requireNonNull(e.getClickedBlock()).getLocation(), e.getPlayer().getInventory().getItemInMainHand()));
                     e.getPlayer().playSound(e.getClickedBlock().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1f, 1.17f);
@@ -412,14 +487,14 @@ public class WandSVC implements IrisService {
                 }
             }
 
-            if(isHoldingDust(e.getPlayer())) {
-                if(e.getAction().equals(Action.RIGHT_CLICK_BLOCK)) {
+            if (isHoldingDust(e.getPlayer())) {
+                if (e.getAction().equals(Action.RIGHT_CLICK_BLOCK)) {
                     e.setCancelled(true);
                     e.getPlayer().playSound(Objects.requireNonNull(e.getClickedBlock()).getLocation(), Sound.ENTITY_ENDER_EYE_DEATH, 2f, 1.97f);
                     DustRevealer.spawn(e.getClickedBlock(), new VolmitSender(e.getPlayer(), Iris.instance.getTag()));
                 }
             }
-        } catch(Throwable xx) {
+        } catch (Throwable xx) {
             Iris.reportError(xx);
         }
     }
@@ -427,8 +502,7 @@ public class WandSVC implements IrisService {
     /**
      * Is the player holding Dust?
      *
-     * @param p
-     *     The player
+     * @param p The player
      * @return True if they are
      */
     public boolean isHoldingDust(Player p) {
@@ -439,8 +513,7 @@ public class WandSVC implements IrisService {
     /**
      * Is the itemstack passed Iris dust?
      *
-     * @param is
-     *     The itemstack
+     * @param is The itemstack
      * @return True if it is
      */
     public boolean isDust(ItemStack is) {
@@ -450,23 +523,20 @@ public class WandSVC implements IrisService {
     /**
      * Update the location on an Iris wand
      *
-     * @param left
-     *     True for first location, false for second
-     * @param a
-     *     The location
-     * @param item
-     *     The wand
+     * @param left True for first location, false for second
+     * @param a    The location
+     * @param item The wand
      * @return The updated wand
      */
     public ItemStack update(boolean left, Location a, ItemStack item) {
-        if(!isWand(item)) {
+        if (!isWand(item)) {
             return item;
         }
 
         Location[] f = getCuboidFromItem(item);
         Location other = left ? f[1] : f[0];
 
-        if(other != null && !other.getWorld().getName().equals(a.getWorld().getName())) {
+        if (other != null && !WorldIdentity.key(other.getWorld()).equals(WorldIdentity.key(a.getWorld()))) {
             other = null;
         }
 

adapters/bukkit/plugin/src/main/java/art/arcane/iris/core/wand/WandSelection.java

@@ -0,0 +1,97 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2022 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.core.wand;
+
+import art.arcane.volmlib.util.data.Cuboid;
+import art.arcane.volmlib.util.math.M;
+import org.bukkit.Location;
+import org.bukkit.Particle;
+import org.bukkit.entity.Player;
+import org.bukkit.util.Vector;
+
+import java.awt.Color;
+
+import static art.arcane.iris.util.common.data.registry.Particles.REDSTONE;
+
+public class WandSelection {
+    private final Cuboid c;
+    private final Player p;
+    private static final double STEP = 0.10;
+
+    public WandSelection(Cuboid c, Player p) {
+        this.c = c;
+        this.p = p;
+    }
+
+    public void draw() {
+        Location playerLoc = p.getLocation();
+        double maxDistanceSquared = 256 * 256;
+        int particleCount = 0;
+
+        // cube!
+        Location[][] edges = {
+                {c.getLowerNE(), new Location(c.getWorld(), c.getUpperX() + 1, c.getLowerY(), c.getLowerZ())},
+                {c.getLowerNE(), new Location(c.getWorld(), c.getLowerX(), c.getUpperY() + 1, c.getLowerZ())},
+                {c.getLowerNE(), new Location(c.getWorld(), c.getLowerX(), c.getLowerY(), c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getUpperX() + 1, c.getLowerY(), c.getLowerZ()), new Location(c.getWorld(), c.getUpperX() + 1, c.getUpperY() + 1, c.getLowerZ())},
+                {new Location(c.getWorld(), c.getUpperX() + 1, c.getLowerY(), c.getLowerZ()), new Location(c.getWorld(), c.getUpperX() + 1, c.getLowerY(), c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getLowerX(), c.getUpperY() + 1, c.getLowerZ()), new Location(c.getWorld(), c.getUpperX() + 1, c.getUpperY() + 1, c.getLowerZ())},
+                {new Location(c.getWorld(), c.getLowerX(), c.getUpperY() + 1, c.getLowerZ()), new Location(c.getWorld(), c.getLowerX(), c.getUpperY() + 1, c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getLowerX(), c.getLowerY(), c.getUpperZ() + 1), new Location(c.getWorld(), c.getUpperX() + 1, c.getLowerY(), c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getLowerX(), c.getLowerY(), c.getUpperZ() + 1), new Location(c.getWorld(), c.getLowerX(), c.getUpperY() + 1, c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getUpperX() + 1, c.getUpperY() + 1, c.getLowerZ()), new Location(c.getWorld(), c.getUpperX() + 1, c.getUpperY() + 1, c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getLowerX(), c.getUpperY() + 1, c.getUpperZ() + 1), new Location(c.getWorld(), c.getUpperX() + 1, c.getUpperY() + 1, c.getUpperZ() + 1)},
+                {new Location(c.getWorld(), c.getUpperX() + 1, c.getLowerY(), c.getUpperZ() + 1), new Location(c.getWorld(), c.getUpperX() + 1, c.getUpperY() + 1, c.getUpperZ() + 1)}
+        };
+
+        for (Location[] edge : edges) {
+            Vector direction = edge[1].toVector().subtract(edge[0].toVector());
+            double length = direction.length();
+            direction.normalize();
+
+            for (double d = 0; d <= length; d += STEP) {
+                Location particleLoc = edge[0].clone().add(direction.clone().multiply(d));
+
+                if (playerLoc.distanceSquared(particleLoc) > maxDistanceSquared) {
+                    continue;
+                }
+
+                spawnParticle(particleLoc, playerLoc);
+                particleCount++;
+            }
+        }
+    }
+
+    private void spawnParticle(Location particleLoc, Location playerLoc) {
+        double accuracy = M.lerpInverse(0, 64 * 64, playerLoc.distanceSquared(particleLoc));
+        double dist = M.lerp(0.125, 3.5, accuracy);
+
+        if (M.r(Math.min(dist * 5, 0.9D) * 0.995)) {
+            return;
+        }
+
+        float hue = (float) (0.5f + (Math.sin((particleLoc.getX() + particleLoc.getY() + particleLoc.getZ() + (p.getTicksLived() / 2f)) / 20f) / 2));
+        Color color = Color.getHSBColor(hue, 1, 1);
+
+        p.spawnParticle(REDSTONE, particleLoc,
+                0, 0, 0, 0, 1,
+                new Particle.DustOptions(org.bukkit.Color.fromRGB(color.getRed(), color.getGreen(), color.getBlue()),
+                        (float) dist * 3f));
+    }
+}

adapters/bukkit/plugin/src/main/resources/paper-plugin.yml

@@ -0,0 +1,10 @@
+name: ${name}
+version: ${version}
+main: ${main}
+bootstrapper: ${bootstrapper}
+folia-supported: true
+api-version: '${apiVersion}'
+load: STARTUP
+authors: [ cyberpwn, NextdoorPsycho, Vatuu ]
+website: volmit.com
+description: More than a Dimension!

adapters/bukkit/plugin/src/main/resources/plugin.yml

@@ -0,0 +1,12 @@
+name: ${name}
+version: ${version}
+main: ${main}
+folia-supported: true
+load: STARTUP
+authors: [ cyberpwn, NextdoorPsycho, Vatuu ]
+website: volmit.com
+description: More than a Dimension!
+commands:
+  iris:
+    aliases: [ ir, irs ]
+api-version: '${apiVersion}'

adapters/bukkit/plugin/src/test/java/art/arcane/iris/IrisBootstrapTest.java

@@ -0,0 +1,199 @@
+package art.arcane.iris;
+
+import io.papermc.paper.datapack.Datapack;
+import io.papermc.paper.datapack.DatapackRegistrar;
+import io.papermc.paper.datapack.DatapackSource;
+import io.papermc.paper.datapack.DiscoveredDatapack;
+import io.papermc.paper.plugin.configuration.PluginMeta;
+import net.kyori.adventure.text.Component;
+import org.bukkit.FeatureFlag;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.Path;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+
+public class IrisBootstrapTest {
+    @Rule
+    public TemporaryFolder temporaryFolder = new TemporaryFolder();
+
+    @Test
+    public void discoverPackAutoEnablesAtFixedTop() throws Exception {
+        File datapackDirectory = temporaryFolder.newFolder("datapack");
+        RecordingRegistrar registrar = new RecordingRegistrar(DiscoveryBehavior.ACCEPT);
+
+        DiscoveredDatapack discovered = IrisBootstrap.discoverPack(registrar, datapackDirectory.toPath());
+
+        assertSame(registrar.discoveredDatapack, discovered);
+        assertEquals(datapackDirectory.toPath(), registrar.discoveredPath);
+        assertEquals(IrisBootstrap.PACK_ID, registrar.discoveredId);
+        assertTrue(registrar.configurer.autoEnableOnServerStart);
+        assertTrue(registrar.configurer.fixedPosition);
+        assertEquals(Datapack.Position.TOP, registrar.configurer.position);
+    }
+
+    @Test
+    public void rejectedDiscoveryReportsDatapackPath() throws Exception {
+        File datapackDirectory = temporaryFolder.newFolder("datapack");
+        RecordingRegistrar registrar = new RecordingRegistrar(DiscoveryBehavior.REJECT);
+
+        IllegalStateException failure = assertThrows(
+                IllegalStateException.class,
+                () -> IrisBootstrap.discoverPack(registrar, datapackDirectory.toPath())
+        );
+
+        assertTrue(failure.getMessage().contains(datapackDirectory.toPath().toString()));
+    }
+
+    @Test
+    public void discoveryIoFailurePropagates() throws Exception {
+        File datapackDirectory = temporaryFolder.newFolder("datapack");
+        RecordingRegistrar registrar = new RecordingRegistrar(DiscoveryBehavior.FAIL);
+
+        IOException failure = assertThrows(
+                IOException.class,
+                () -> IrisBootstrap.discoverPack(registrar, datapackDirectory.toPath())
+        );
+
+        assertEquals("discovery failed", failure.getMessage());
+    }
+
+    private enum DiscoveryBehavior {
+        ACCEPT,
+        REJECT,
+        FAIL
+    }
+
+    private static final class RecordingConfigurer implements DatapackRegistrar.Configurer {
+        private boolean autoEnableOnServerStart;
+        private boolean fixedPosition;
+        private Datapack.Position position;
+
+        @Override
+        public DatapackRegistrar.Configurer title(Component title) {
+            return this;
+        }
+
+        @Override
+        public DatapackRegistrar.Configurer autoEnableOnServerStart(boolean autoEnableOnServerStart) {
+            this.autoEnableOnServerStart = autoEnableOnServerStart;
+            return this;
+        }
+
+        @Override
+        public DatapackRegistrar.Configurer position(boolean fixed, Datapack.Position position) {
+            this.fixedPosition = fixed;
+            this.position = position;
+            return this;
+        }
+    }
+
+    private static final class RecordingRegistrar implements DatapackRegistrar {
+        private final DiscoveryBehavior behavior;
+        private final RecordingConfigurer configurer;
+        private final DiscoveredDatapack discoveredDatapack;
+        private Path discoveredPath;
+        private String discoveredId;
+
+        private RecordingRegistrar(DiscoveryBehavior behavior) {
+            this.behavior = behavior;
+            this.configurer = new RecordingConfigurer();
+            this.discoveredDatapack = new StubDiscoveredDatapack();
+        }
+
+        @Override
+        public boolean hasPackDiscovered(String name) {
+            return false;
+        }
+
+        @Override
+        public DiscoveredDatapack getDiscoveredPack(String name) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public boolean removeDiscoveredPack(String name) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public Map<String, DiscoveredDatapack> getDiscoveredPacks() {
+            return Collections.emptyMap();
+        }
+
+        @Override
+        public DiscoveredDatapack discoverPack(URI uri, String id, Consumer<Configurer> configurer) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public DiscoveredDatapack discoverPack(Path path, String id, Consumer<Configurer> configurer) throws IOException {
+            this.discoveredPath = path;
+            this.discoveredId = id;
+            if (behavior == DiscoveryBehavior.FAIL) {
+                throw new IOException("discovery failed");
+            }
+            configurer.accept(this.configurer);
+            return behavior == DiscoveryBehavior.ACCEPT ? discoveredDatapack : null;
+        }
+
+        @Override
+        public DiscoveredDatapack discoverPack(PluginMeta pluginMeta, URI uri, String id, Consumer<Configurer> configurer) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public DiscoveredDatapack discoverPack(PluginMeta pluginMeta, Path path, String id, Consumer<Configurer> configurer) {
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    private static final class StubDiscoveredDatapack implements DiscoveredDatapack {
+        @Override
+        public String getName() {
+            return IrisBootstrap.PACK_ID;
+        }
+
+        @Override
+        public Component getTitle() {
+            return Component.text(IrisBootstrap.PACK_ID);
+        }
+
+        @Override
+        public Component getDescription() {
+            return Component.empty();
+        }
+
+        @Override
+        public boolean isRequired() {
+            return true;
+        }
+
+        @Override
+        public Datapack.Compatibility getCompatibility() {
+            return Datapack.Compatibility.COMPATIBLE;
+        }
+
+        @Override
+        public Set<FeatureFlag> getRequiredFeatures() {
+            return Collections.emptySet();
+        }
+
+        @Override
+        public DatapackSource getSource() {
+            throw new UnsupportedOperationException();
+        }
+    }
+}

adapters/bukkit/plugin/src/test/java/art/arcane/iris/IrisDiagnosticsTest.java

@@ -0,0 +1,75 @@
+package art.arcane.iris;
+
+import art.arcane.iris.core.splash.IrisSplashPackScanner;
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Comparator;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class IrisDiagnosticsTest {
+    @Test
+    public void reportErrorWithContextPrintsFullStacktrace() {
+        ByteArrayOutputStream output = new ByteArrayOutputStream();
+        PrintStream originalErr = System.err;
+        System.setErr(new PrintStream(output, true, StandardCharsets.UTF_8));
+        try {
+            Iris.reportError("Runtime world creation failed.", new IllegalStateException("outer", new IllegalArgumentException("inner")));
+        } finally {
+            System.setErr(originalErr);
+        }
+
+        String text = output.toString(StandardCharsets.UTF_8);
+        assertTrue(text.contains("Runtime world creation failed."));
+        assertTrue(text.contains("IllegalStateException"));
+        assertTrue(text.contains("IllegalArgumentException"));
+        assertTrue(text.contains("inner"));
+    }
+
+    @Test
+    public void splashPackScanSkipsInternalAndInvalidFolders() throws Exception {
+        Path root = Files.createTempDirectory("iris-splash");
+        try {
+            Path validPack = root.resolve("overworld");
+            Files.createDirectories(validPack.resolve("dimensions"));
+            Files.writeString(validPack.resolve("dimensions").resolve("overworld.json"), "{\"version\":\"4000\"}");
+
+            Files.createDirectories(root.resolve("datapack-imports"));
+
+            Path brokenPack = root.resolve("broken");
+            Files.createDirectories(brokenPack.resolve("dimensions"));
+            Files.writeString(brokenPack.resolve("dimensions").resolve("broken.json"), "{");
+
+            ByteArrayOutputStream output = new ByteArrayOutputStream();
+            PrintStream originalErr = System.err;
+            System.setErr(new PrintStream(output, true, StandardCharsets.UTF_8));
+            List<IrisSplashPackScanner.SplashPackMetadata> packs;
+            try {
+                packs = IrisSplashPackScanner.collect(root.toFile(), Iris::reportError);
+            } finally {
+                System.setErr(originalErr);
+            }
+
+            assertEquals(1, packs.size());
+            assertEquals("overworld", packs.get(0).name());
+            assertEquals("4000", packs.get(0).version());
+
+            String text = output.toString(StandardCharsets.UTF_8);
+            assertTrue(text.contains("Failed to read splash metadata for dimension pack \"broken\"."));
+            assertTrue(text.contains("Json"));
+        } finally {
+            Files.walk(root)
+                    .sorted(Comparator.reverseOrder())
+                    .map(Path::toFile)
+                    .forEach(File::delete);
+        }
+    }
+}

adapters/bukkit/plugin/src/test/java/art/arcane/iris/PaperPluginMetadataTest.java

@@ -0,0 +1,59 @@
+package art.arcane.iris;
+
+import org.bukkit.plugin.PluginDescriptionFile;
+import org.bukkit.plugin.PluginLoadOrder;
+import org.junit.Test;
+
+import java.io.InputStream;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+public class PaperPluginMetadataTest {
+    @Test
+    public void paperMetadataDeclaresBootstrapAndFoliaSupport() throws Exception {
+        String metadata;
+        try (InputStream stream = PaperPluginMetadataTest.class.getResourceAsStream("/paper-plugin.yml")) {
+            assertNotNull(stream);
+            metadata = new String(stream.readAllBytes(), StandardCharsets.UTF_8);
+        }
+
+        assertTrue(metadata.contains("bootstrapper: " + IrisBootstrap.class.getName()));
+        assertTrue(metadata.contains("folia-supported: true"));
+        assertTrue(metadata.contains("load: STARTUP"));
+        assertFalse(metadata.contains("commands:"));
+    }
+
+    @Test
+    public void bukkitMetadataRetainsStartupCommandAndAliases() throws Exception {
+        PluginDescriptionFile metadata;
+        try (InputStream stream = PaperPluginMetadataTest.class.getResourceAsStream("/plugin.yml")) {
+            assertNotNull(stream);
+            metadata = new PluginDescriptionFile(stream);
+        }
+
+        assertEquals(Iris.class.getName(), metadata.getMain());
+        assertEquals(PluginLoadOrder.STARTUP, metadata.getLoad());
+        Map<String, Map<String, Object>> commands = metadata.getCommands();
+        assertTrue(commands.containsKey("iris"));
+        assertEquals(List.of("ir", "irs"), commands.get("iris").get("aliases"));
+    }
+
+    @Test
+    public void processedResourcesContainBothMetadataFormats() throws Exception {
+        URL paperMetadata = PaperPluginMetadataTest.class.getResource("/paper-plugin.yml");
+        assertNotNull(paperMetadata);
+        assertEquals("file", paperMetadata.getProtocol());
+        Path bukkitMetadata = Path.of(paperMetadata.toURI()).resolveSibling("plugin.yml");
+        assertTrue(Files.isRegularFile(bukkitMetadata));
+        assertFalse(Files.readString(bukkitMetadata, StandardCharsets.UTF_8).contains("${"));
+    }
+}

adapters/bukkit/plugin/src/test/java/art/arcane/iris/core/StudioRuntimeCleanupTest.java

@@ -0,0 +1,47 @@
+package art.arcane.iris.core;
+
+import art.arcane.iris.core.commands.CommandStudio;
+import art.arcane.iris.core.tools.IrisCreator;
+import org.junit.Test;
+
+import java.util.Arrays;
+
+import static org.junit.Assert.assertFalse;
+
+public class StudioRuntimeCleanupTest {
+    @Test
+    public void pregenSettingsNoLongerExposeStartupNoisemapPrebake() {
+        boolean found = Arrays.stream(IrisSettings.IrisSettingsPregen.class.getDeclaredFields())
+                .anyMatch(field -> field.getName().equals("startupNoisemapPrebake"));
+
+        assertFalse(found);
+    }
+
+    @Test
+    public void studioCommandNoLongerExposesProfilecache() {
+        boolean found = Arrays.stream(CommandStudio.class.getDeclaredMethods())
+                .anyMatch(method -> method.getName().equals("profilecache"));
+
+        assertFalse(found);
+    }
+
+    @Test
+    public void studioCreatorNoLongerContainsPrewarmOrPrebakeHelpers() {
+        boolean found = Arrays.stream(IrisCreator.class.getDeclaredMethods())
+                .map(method -> method.getName().toLowerCase())
+                .anyMatch(name -> name.contains("prewarm") || name.contains("prebake"));
+
+        assertFalse(found);
+    }
+
+    @Test
+    public void noisemapPrebakePipelineClassIsRemoved() {
+        try {
+            Class.forName("art.arcane.iris.engine.IrisNoisemapPrebakePipeline");
+        } catch (ClassNotFoundException ignored) {
+            return;
+        }
+
+        throw new AssertionError("IrisNoisemapPrebakePipeline should not exist.");
+    }
+}

adapters/bukkit/plugin/src/test/java/art/arcane/iris/core/service/IrisEngineSVCTest.java

@@ -0,0 +1,24 @@
+package art.arcane.iris.core.service;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class IrisEngineSVCTest {
+    @Test
+    public void maintenanceSkipsReductionWhenPregenDoesNotTargetWorld() {
+        assertTrue(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(true, false));
+    }
+
+    @Test
+    public void maintenanceDoesNotSkipReductionForActivePregenWorld() {
+        assertFalse(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(true, true));
+    }
+
+    @Test
+    public void noMaintenanceNeverSkipsReduction() {
+        assertFalse(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(false, false));
+        assertFalse(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(false, true));
+    }
+}

adapters/bukkit/plugin/src/test/java/art/arcane/iris/core/service/PaperCommandRegistrarTest.java

@@ -0,0 +1,115 @@
+package art.arcane.iris.core.service;
+
+import io.papermc.paper.command.brigadier.BasicCommand;
+import io.papermc.paper.command.brigadier.CommandSourceStack;
+import org.bukkit.Location;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Entity;
+import org.junit.Test;
+
+import java.lang.reflect.Proxy;
+import java.util.List;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+public class PaperCommandRegistrarTest {
+    @Test
+    public void paperCommandDelegatesExecutionAndSuggestions() {
+        RecordingCommandService service = new RecordingCommandService();
+        BasicCommand command = PaperCommandRegistrar.command(service);
+        CommandSender sender = sender();
+        CommandSourceStack source = new TestCommandSourceStack(sender);
+        String[] arguments = {"create", "world"};
+
+        command.execute(source, arguments);
+        assertSame(sender, service.sender);
+        assertEquals("iris", service.label);
+        assertArrayEquals(arguments, service.arguments);
+        assertEquals(List.of("first", "second"), command.suggest(source, new String[]{"cr"}));
+        assertTrue(command.canUse(sender));
+    }
+
+    private static CommandSender sender() {
+        return (CommandSender) Proxy.newProxyInstance(
+                CommandSender.class.getClassLoader(),
+                new Class<?>[]{CommandSender.class},
+                (proxy, method, arguments) -> primitiveDefault(method.getReturnType())
+        );
+    }
+
+    private static Object primitiveDefault(Class<?> type) {
+        if (type == boolean.class) {
+            return false;
+        }
+        if (type == byte.class) {
+            return (byte) 0;
+        }
+        if (type == short.class) {
+            return (short) 0;
+        }
+        if (type == int.class) {
+            return 0;
+        }
+        if (type == long.class) {
+            return 0L;
+        }
+        if (type == float.class) {
+            return 0F;
+        }
+        if (type == double.class) {
+            return 0D;
+        }
+        if (type == char.class) {
+            return '\0';
+        }
+        return null;
+    }
+
+    private static final class RecordingCommandService extends CommandSVC {
+        private CommandSender sender;
+        private String label;
+        private String[] arguments;
+
+        @Override
+        void executeRoot(CommandSender sender, String label, String[] args) {
+            this.sender = sender;
+            this.label = label;
+            this.arguments = args;
+        }
+
+        @Override
+        List<String> tabCompleteRoot(CommandSender sender, String alias, String[] args) {
+            return List.of("first", "second");
+        }
+    }
+
+    private record TestCommandSourceStack(CommandSender sender) implements CommandSourceStack {
+        @Override
+        public Location getLocation() {
+            return null;
+        }
+
+        @Override
+        public CommandSender getSender() {
+            return sender;
+        }
+
+        @Override
+        public Entity getExecutor() {
+            return null;
+        }
+
+        @Override
+        public CommandSourceStack withLocation(Location location) {
+            return this;
+        }
+
+        @Override
+        public CommandSourceStack withExecutor(Entity executor) {
+            return this;
+        }
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/ClientPacketSink.java

@@ -0,0 +1,6 @@
+package art.arcane.iris.client;
+
+@FunctionalInterface
+public interface ClientPacketSink {
+    void send(byte[] frame);
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClient.java

@@ -0,0 +1,161 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import art.arcane.iris.spi.protocol.IrisMessageCodec;
+import art.arcane.iris.spi.protocol.IrisProtocol;
+import art.arcane.iris.spi.protocol.ProtocolException;
+import net.minecraft.resources.Identifier;
+
+public final class IrisClient {
+    public static final Identifier HUD_ELEMENT_ID = Identifier.fromNamespaceAndPath("irisworldgen", "pregen_hud");
+    public static final Identifier KEYBIND_CATEGORY_ID = Identifier.fromNamespaceAndPath("irisworldgen", "iris");
+    public static final String KEYBIND_TOGGLE_HUD = "key.irisworldgen.toggle_pregen_hud";
+    public static final String KEYBIND_OPEN_MAP = "key.irisworldgen.open_vision_map";
+    public static final String KEYBIND_TOGGLE_WHAT = "key.irisworldgen.toggle_what_overlay";
+
+    private static final IrisClientSession SESSION = new IrisClientSession();
+    private static final IrisClientPregenState PREGEN = new IrisClientPregenState();
+    private static final IrisClientDimension DIMENSION = new IrisClientDimension();
+    private static final IrisClientTileCache TILES = new IrisClientTileCache(IrisClient::sendFrame, System::currentTimeMillis);
+    private static final IrisClientCursor CURSOR = new IrisClientCursor(IrisClient::sendFrame, System::currentTimeMillis);
+    private static final IrisClientMarkers MARKERS = new IrisClientMarkers();
+    private static final IrisClientRegionMap REGIONS = new IrisClientRegionMap();
+    private static final IrisClientToasts TOASTS = new IrisClientToasts();
+    private static volatile ClientPacketSink sink;
+    private static volatile boolean hudVisible = true;
+    private static volatile boolean whatVisible = false;
+
+    private IrisClient() {
+    }
+
+    public static IrisClientSession session() {
+        return SESSION;
+    }
+
+    public static IrisClientPregenState pregen() {
+        return PREGEN;
+    }
+
+    public static IrisClientDimension dimension() {
+        return DIMENSION;
+    }
+
+    public static IrisClientTileCache tiles() {
+        return TILES;
+    }
+
+    public static IrisClientCursor cursor() {
+        return CURSOR;
+    }
+
+    public static IrisClientMarkers markers() {
+        return MARKERS;
+    }
+
+    public static IrisClientRegionMap regions() {
+        return REGIONS;
+    }
+
+    public static IrisClientToasts toasts() {
+        return TOASTS;
+    }
+
+    public static boolean hudVisible() {
+        return hudVisible;
+    }
+
+    public static void toggleHud() {
+        hudVisible = !hudVisible;
+    }
+
+    public static boolean whatVisible() {
+        return whatVisible;
+    }
+
+    public static void toggleWhat() {
+        whatVisible = !whatVisible;
+    }
+
+    public static boolean visionAvailable() {
+        return SESSION.isReady() && DIMENSION.irisWorld() && (SESSION.serverCapabilities() & IrisProtocol.CAPABILITY_VISION) != 0L;
+    }
+
+    public static boolean cursorAvailable() {
+        return SESSION.isReady() && DIMENSION.irisWorld() && (SESSION.serverCapabilities() & IrisProtocol.CAPABILITY_CURSOR) != 0L;
+    }
+
+    public static void bindSender(ClientPacketSink boundSink) {
+        sink = boundSink;
+        SESSION.bind(boundSink);
+    }
+
+    public static void sendFrame(byte[] frame) {
+        ClientPacketSink activeSink = sink;
+        if (activeSink != null) {
+            activeSink.send(frame);
+        }
+    }
+
+    public static void onWorldJoin() {
+        SESSION.sendHello();
+    }
+
+    public static void onDisconnect() {
+        SESSION.reset();
+        PREGEN.clear();
+        DIMENSION.clear();
+        TILES.clear();
+        CURSOR.clear();
+        MARKERS.clear();
+        REGIONS.clear();
+        TOASTS.clear();
+    }
+
+    public static void onInbound(byte[] frame) {
+        if (frame == null) {
+            return;
+        }
+        IrisMessage message;
+        try {
+            message = IrisMessageCodec.decode(frame);
+        } catch (ProtocolException rejected) {
+            return;
+        }
+        if (message == null) {
+            return;
+        }
+        route(message);
+    }
+
+    private static void route(IrisMessage message) {
+        switch (message) {
+            case IrisMessage.ServerHello serverHello -> SESSION.onServerHello(serverHello);
+            case IrisMessage.PregenProgress progress -> PREGEN.onProgress(progress);
+            case IrisMessage.PregenEnd end -> onPregenEnd(end.jobId());
+            case IrisMessage.DimensionStatus status -> onDimensionStatus(status);
+            case IrisMessage.CursorInfo cursorInfo -> CURSOR.onCursorInfo(cursorInfo);
+            case IrisMessage.VisionTile visionTile -> TILES.onVisionTile(visionTile);
+            case IrisMessage.VisionMarkers visionMarkers -> MARKERS.onMarkers(visionMarkers);
+            case IrisMessage.PregenRegionDelta delta -> REGIONS.onDelta(delta, PREGEN.activeJobId());
+            case IrisMessage.StudioHotload hotload -> TOASTS.enqueueHotload(hotload.packKey(), hotload.changedFiles(), hotload.failed(), hotload.message());
+            case IrisMessage.Toast toast -> TOASTS.enqueue(toast.kind(), toast.title(), toast.body());
+            default -> {
+            }
+        }
+    }
+
+    private static void onPregenEnd(long jobId) {
+        PREGEN.onEnd(jobId);
+        REGIONS.onEnd(jobId);
+    }
+
+    private static void onDimensionStatus(IrisMessage.DimensionStatus status) {
+        boolean changed = DIMENSION.onDimensionStatus(status);
+        if (changed) {
+            TILES.clear();
+            MARKERS.clear();
+            CURSOR.clear();
+            REGIONS.clear();
+        }
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientCursor.java

@@ -0,0 +1,57 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import art.arcane.iris.spi.protocol.IrisMessageCodec;
+
+import java.util.function.LongSupplier;
+
+public final class IrisClientCursor {
+    private static final long MIN_REQUEST_INTERVAL_MILLIS = 500L;
+
+    private final ClientPacketSink sink;
+    private final LongSupplier clock;
+    private volatile IrisMessage.CursorInfo latest;
+    private int lastRequestedX;
+    private int lastRequestedZ;
+    private boolean requested;
+    private long lastRequestMillis;
+
+    public IrisClientCursor(ClientPacketSink sink, LongSupplier clock) {
+        this.sink = sink;
+        this.clock = clock;
+        this.latest = null;
+        this.lastRequestedX = 0;
+        this.lastRequestedZ = 0;
+        this.requested = false;
+        this.lastRequestMillis = 0L;
+    }
+
+    public synchronized void requestFor(int blockX, int blockZ) {
+        if (requested && blockX == lastRequestedX && blockZ == lastRequestedZ) {
+            return;
+        }
+        long now = clock.getAsLong();
+        if (now - lastRequestMillis < MIN_REQUEST_INTERVAL_MILLIS) {
+            return;
+        }
+        sink.send(IrisMessageCodec.encode(new IrisMessage.CursorInfoRequest(blockX, blockZ)));
+        lastRequestedX = blockX;
+        lastRequestedZ = blockZ;
+        requested = true;
+        lastRequestMillis = now;
+    }
+
+    public void onCursorInfo(IrisMessage.CursorInfo info) {
+        latest = info;
+    }
+
+    public IrisMessage.CursorInfo latest() {
+        return latest;
+    }
+
+    public synchronized void clear() {
+        latest = null;
+        requested = false;
+        lastRequestMillis = 0L;
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientDimension.java

@@ -0,0 +1,29 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+
+public final class IrisClientDimension {
+    private volatile IrisMessage.DimensionStatus status;
+
+    public boolean onDimensionStatus(IrisMessage.DimensionStatus incoming) {
+        IrisMessage.DimensionStatus previous = status;
+        status = incoming;
+        if (previous == null) {
+            return true;
+        }
+        return previous.irisWorld() != incoming.irisWorld() || !previous.dimensionKey().equals(incoming.dimensionKey());
+    }
+
+    public IrisMessage.DimensionStatus status() {
+        return status;
+    }
+
+    public boolean irisWorld() {
+        IrisMessage.DimensionStatus current = status;
+        return current != null && current.irisWorld();
+    }
+
+    public void clear() {
+        status = null;
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientHud.java

@@ -0,0 +1,14 @@
+package art.arcane.iris.client;
+
+import net.minecraft.client.gui.GuiGraphicsExtractor;
+
+public final class IrisClientHud {
+    private IrisClientHud() {
+    }
+
+    public static void render(GuiGraphicsExtractor graphics) {
+        IrisToastPresenter.pump();
+        IrisPregenHud.render(graphics);
+        IrisWhatOverlay.render(graphics);
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientKeybinds.java

@@ -0,0 +1,39 @@
+package art.arcane.iris.client;
+
+import net.minecraft.client.KeyMapping;
+import net.minecraft.client.Minecraft;
+import org.lwjgl.glfw.GLFW;
+
+public final class IrisClientKeybinds {
+    private static final KeyMapping.Category CATEGORY = KeyMapping.Category.register(IrisClient.KEYBIND_CATEGORY_ID);
+    public static final KeyMapping TOGGLE_HUD = new KeyMapping(IrisClient.KEYBIND_TOGGLE_HUD, GLFW.GLFW_KEY_H, CATEGORY);
+    public static final KeyMapping OPEN_MAP = new KeyMapping(IrisClient.KEYBIND_OPEN_MAP, GLFW.GLFW_KEY_M, CATEGORY);
+    public static final KeyMapping TOGGLE_WHAT = new KeyMapping(IrisClient.KEYBIND_TOGGLE_WHAT, GLFW.GLFW_KEY_J, CATEGORY);
+
+    private IrisClientKeybinds() {
+    }
+
+    public static KeyMapping.Category category() {
+        return CATEGORY;
+    }
+
+    public static void pollToggle() {
+        while (TOGGLE_HUD.consumeClick()) {
+            IrisClient.toggleHud();
+        }
+        while (TOGGLE_WHAT.consumeClick()) {
+            IrisClient.toggleWhat();
+        }
+        while (OPEN_MAP.consumeClick()) {
+            openVisionScreen();
+        }
+    }
+
+    private static void openVisionScreen() {
+        Minecraft minecraft = Minecraft.getInstance();
+        if (minecraft == null || minecraft.level == null || minecraft.player == null) {
+            return;
+        }
+        minecraft.setScreenAndShow(new IrisVisionScreen());
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientMarkers.java

@@ -0,0 +1,27 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class IrisClientMarkers {
+    private final Map<IrisTileKey, List<IrisMessage.VisionMarkers.Marker>> byTile;
+
+    public IrisClientMarkers() {
+        this.byTile = new ConcurrentHashMap<>();
+    }
+
+    public void onMarkers(IrisMessage.VisionMarkers markers) {
+        byTile.put(new IrisTileKey(markers.tileX(), markers.tileZ(), markers.zoomLevel()), List.copyOf(markers.markers()));
+    }
+
+    public List<IrisMessage.VisionMarkers.Marker> forTile(IrisTileKey key) {
+        return byTile.get(key);
+    }
+
+    public void clear() {
+        byTile.clear();
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientPregenState.java

@@ -0,0 +1,45 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class IrisClientPregenState {
+    private final ConcurrentHashMap<Long, IrisMessage.PregenProgress> jobs;
+    private volatile Long activeJobId;
+
+    public IrisClientPregenState() {
+        this.jobs = new ConcurrentHashMap<>();
+        this.activeJobId = null;
+    }
+
+    public void onProgress(IrisMessage.PregenProgress progress) {
+        jobs.put(progress.jobId(), progress);
+        activeJobId = progress.jobId();
+    }
+
+    public void onEnd(long jobId) {
+        jobs.remove(jobId);
+        Long current = activeJobId;
+        if (current != null && current == jobId) {
+            activeJobId = jobs.keySet().stream().findFirst().orElse(null);
+        }
+    }
+
+    public IrisMessage.PregenProgress active() {
+        Long current = activeJobId;
+        if (current == null) {
+            return null;
+        }
+        return jobs.get(current);
+    }
+
+    public Long activeJobId() {
+        return activeJobId;
+    }
+
+    public void clear() {
+        jobs.clear();
+        activeJobId = null;
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientRegionMap.java

@@ -0,0 +1,118 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class IrisClientRegionMap {
+    private static final int MAX_REGIONS = 4096;
+
+    private final ConcurrentHashMap<Long, Integer> states;
+    private volatile boolean tracking;
+    private volatile long jobId;
+    private volatile Bounds bounds;
+
+    public IrisClientRegionMap() {
+        this.states = new ConcurrentHashMap<>();
+        this.tracking = false;
+        this.jobId = 0L;
+        this.bounds = null;
+    }
+
+    public void onDelta(IrisMessage.PregenRegionDelta delta, Long activeJobId) {
+        if (activeJobId == null) {
+            return;
+        }
+        long active = activeJobId;
+        if (delta.jobId() != active) {
+            return;
+        }
+        if (!tracking || jobId != delta.jobId()) {
+            resetTo(delta.jobId());
+        }
+        record(delta.regionX(), delta.regionZ(), delta.state());
+    }
+
+    public void onEnd(long endedJobId) {
+        if (tracking && jobId == endedJobId) {
+            clear();
+        }
+    }
+
+    public boolean hasData() {
+        return tracking && !states.isEmpty();
+    }
+
+    public Bounds bounds() {
+        return bounds;
+    }
+
+    public void forEachCell(CellConsumer consumer) {
+        for (Map.Entry<Long, Integer> entry : states.entrySet()) {
+            long packed = entry.getKey();
+            consumer.accept(regionX(packed), regionZ(packed), entry.getValue());
+        }
+    }
+
+    public void clear() {
+        states.clear();
+        bounds = null;
+        tracking = false;
+        jobId = 0L;
+    }
+
+    private void resetTo(long newJobId) {
+        states.clear();
+        bounds = null;
+        jobId = newJobId;
+        tracking = true;
+    }
+
+    private void record(int regionX, int regionZ, int state) {
+        long packed = pack(regionX, regionZ);
+        if (!states.containsKey(packed)) {
+            if (states.size() >= MAX_REGIONS) {
+                return;
+            }
+            Bounds current = bounds;
+            bounds = current == null ? new Bounds(regionX, regionZ, regionX, regionZ) : current.union(regionX, regionZ);
+        }
+        states.put(packed, state);
+    }
+
+    private static long pack(int regionX, int regionZ) {
+        return ((long) regionX << 32) | (regionZ & 0xFFFFFFFFL);
+    }
+
+    private static int regionX(long packed) {
+        return (int) (packed >> 32);
+    }
+
+    private static int regionZ(long packed) {
+        return (int) packed;
+    }
+
+    @FunctionalInterface
+    public interface CellConsumer {
+        void accept(int regionX, int regionZ, int state);
+    }
+
+    public record Bounds(int minRegionX, int minRegionZ, int maxRegionX, int maxRegionZ) {
+        public Bounds union(int regionX, int regionZ) {
+            return new Bounds(
+                    Math.min(minRegionX, regionX),
+                    Math.min(minRegionZ, regionZ),
+                    Math.max(maxRegionX, regionX),
+                    Math.max(maxRegionZ, regionZ));
+        }
+
+        public int regionsWide() {
+            return maxRegionX - minRegionX + 1;
+        }
+
+        public int regionsTall() {
+            return maxRegionZ - minRegionZ + 1;
+        }
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientSession.java

@@ -0,0 +1,77 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import art.arcane.iris.spi.protocol.IrisMessageCodec;
+import art.arcane.iris.spi.protocol.IrisProtocol;
+
+public final class IrisClientSession {
+    private static final long CLIENT_CAPABILITIES = IrisProtocol.CAPABILITY_PREGEN | IrisProtocol.CAPABILITY_VISION | IrisProtocol.CAPABILITY_CURSOR | IrisProtocol.CAPABILITY_STUDIO;
+
+    private volatile State state;
+    private volatile long serverCapabilities;
+    private volatile boolean irisActive;
+    private volatile String serverBrand;
+    private volatile ClientPacketSink sink;
+
+    public IrisClientSession() {
+        this.state = State.IDLE;
+        this.serverCapabilities = 0L;
+        this.irisActive = false;
+        this.serverBrand = "";
+        this.sink = null;
+    }
+
+    public void bind(ClientPacketSink boundSink) {
+        this.sink = boundSink;
+    }
+
+    public State state() {
+        return state;
+    }
+
+    public boolean isReady() {
+        return state == State.READY;
+    }
+
+    public boolean irisActive() {
+        return irisActive;
+    }
+
+    public long serverCapabilities() {
+        return serverCapabilities;
+    }
+
+    public String serverBrand() {
+        return serverBrand;
+    }
+
+    public void sendHello() {
+        ClientPacketSink activeSink = sink;
+        if (activeSink == null) {
+            return;
+        }
+        byte[] frame = IrisMessageCodec.encode(new IrisMessage.ClientHello(IrisProtocol.PROTOCOL_VERSION, CLIENT_CAPABILITIES));
+        state = State.AWAITING_HELLO;
+        activeSink.send(frame);
+    }
+
+    public void onServerHello(IrisMessage.ServerHello hello) {
+        this.serverCapabilities = hello.capabilities();
+        this.irisActive = hello.irisActive();
+        this.serverBrand = hello.serverBrand();
+        this.state = State.READY;
+    }
+
+    public void reset() {
+        this.state = State.IDLE;
+        this.serverCapabilities = 0L;
+        this.irisActive = false;
+        this.serverBrand = "";
+    }
+
+    public enum State {
+        IDLE,
+        AWAITING_HELLO,
+        READY
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientTileCache.java

@@ -0,0 +1,113 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import art.arcane.iris.spi.protocol.IrisMessageCodec;
+import art.arcane.iris.spi.protocol.IrisProtocol;
+
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.LongSupplier;
+
+public final class IrisClientTileCache {
+    private static final int MAX_CACHED_TILES = 256;
+    private static final long REQUEST_RETRY_MILLIS = 3000L;
+    private static final int REQUESTS_PER_SECOND = IrisProtocol.MAX_VISION_TILE_REQUESTS_PER_SECOND;
+
+    private final ClientPacketSink sink;
+    private final LongSupplier clock;
+    private final IrisTileAssembler assembler;
+    private final LinkedHashMap<IrisTileKey, IrisTileImage> cache;
+    private final Map<IrisTileKey, Long> pending;
+    private final Deque<IrisTileKey> queue;
+    private final Set<IrisTileKey> queued;
+    private long windowStartMillis;
+    private int sentInWindow;
+
+    public IrisClientTileCache(ClientPacketSink sink, LongSupplier clock) {
+        this.sink = sink;
+        this.clock = clock;
+        this.assembler = new IrisTileAssembler();
+        this.cache = new LinkedHashMap<>(64, 0.75f, true) {
+            @Override
+            protected boolean removeEldestEntry(Map.Entry<IrisTileKey, IrisTileImage> eldest) {
+                return size() > MAX_CACHED_TILES;
+            }
+        };
+        this.pending = new HashMap<>();
+        this.queue = new ArrayDeque<>();
+        this.queued = new HashSet<>();
+        this.windowStartMillis = 0L;
+        this.sentInWindow = 0;
+    }
+
+    public synchronized void onVisionTile(IrisMessage.VisionTile tile) {
+        IrisTileImage image = assembler.add(tile);
+        if (image == null) {
+            return;
+        }
+        IrisTileKey key = new IrisTileKey(tile.tileX(), tile.tileZ(), tile.zoomLevel());
+        cache.put(key, image);
+        pending.remove(key);
+        queued.remove(key);
+    }
+
+    public synchronized IrisTileImage get(IrisTileKey key) {
+        return cache.get(key);
+    }
+
+    public synchronized void resetRequestQueue() {
+        queue.clear();
+        queued.clear();
+    }
+
+    public synchronized void request(IrisTileKey key) {
+        if (cache.containsKey(key)) {
+            return;
+        }
+        long now = clock.getAsLong();
+        Long lastRequest = pending.get(key);
+        if (lastRequest != null && now - lastRequest < REQUEST_RETRY_MILLIS) {
+            return;
+        }
+        if (queued.add(key)) {
+            queue.addLast(key);
+        }
+    }
+
+    public synchronized void pump() {
+        long now = clock.getAsLong();
+        if (now - windowStartMillis >= 1000L) {
+            windowStartMillis = now;
+            sentInWindow = 0;
+        }
+        while (sentInWindow < REQUESTS_PER_SECOND && !queue.isEmpty()) {
+            IrisTileKey key = queue.pollFirst();
+            queued.remove(key);
+            if (cache.containsKey(key)) {
+                continue;
+            }
+            Long lastRequest = pending.get(key);
+            if (lastRequest != null && now - lastRequest < REQUEST_RETRY_MILLIS) {
+                continue;
+            }
+            sink.send(IrisMessageCodec.encode(new IrisMessage.VisionTileRequest(key.tileX(), key.tileZ(), key.zoom())));
+            pending.put(key, now);
+            sentInWindow++;
+        }
+    }
+
+    public synchronized void clear() {
+        assembler.clear();
+        cache.clear();
+        pending.clear();
+        queue.clear();
+        queued.clear();
+        sentInWindow = 0;
+        windowStartMillis = 0L;
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisClientToasts.java

@@ -0,0 +1,75 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+
+import java.util.ArrayDeque;
+
+public final class IrisClientToasts {
+    private static final int MAX_PENDING = 4;
+
+    private final ArrayDeque<Pending> pending;
+
+    public IrisClientToasts() {
+        this.pending = new ArrayDeque<>();
+    }
+
+    public void enqueue(int kind, String title, String body) {
+        Pending entry = new Pending(kind, normalize(title), normalize(body));
+        synchronized (pending) {
+            while (pending.size() >= MAX_PENDING) {
+                pending.pollFirst();
+            }
+            pending.addLast(entry);
+        }
+    }
+
+    public void enqueueHotload(String packKey, int changedFiles, boolean failed, String message) {
+        int kind = failed ? IrisMessage.Toast.KIND_ERROR : IrisMessage.Toast.KIND_SUCCESS;
+        enqueue(kind, "Studio Hotload", hotloadBody(packKey, changedFiles, failed, message));
+    }
+
+    public Pending poll() {
+        synchronized (pending) {
+            return pending.pollFirst();
+        }
+    }
+
+    public void clear() {
+        synchronized (pending) {
+            pending.clear();
+        }
+    }
+
+    private static String normalize(String value) {
+        return value == null ? "" : value;
+    }
+
+    private static String hotloadBody(String packKey, int changedFiles, boolean failed, String message) {
+        StringBuilder builder = new StringBuilder();
+        String pack = normalize(packKey);
+        if (!pack.isEmpty()) {
+            builder.append(pack);
+        }
+        if (changedFiles != 0) {
+            append(builder, changedFiles + (changedFiles == 1 ? " file" : " files"));
+        }
+        String text = normalize(message);
+        if (!text.isEmpty()) {
+            append(builder, text);
+        }
+        if (builder.isEmpty()) {
+            return failed ? "reload failed" : "reloaded";
+        }
+        return builder.toString();
+    }
+
+    private static void append(StringBuilder builder, String part) {
+        if (!builder.isEmpty()) {
+            builder.append("  ");
+        }
+        builder.append(part);
+    }
+
+    public record Pending(int kind, String title, String body) {
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisPregenHud.java

@@ -0,0 +1,153 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Font;
+import net.minecraft.client.gui.GuiGraphicsExtractor;
+
+public final class IrisPregenHud {
+    private static final int PANEL_COLOR = 0xC0101010;
+    private static final int TITLE_COLOR = 0xFF66BB6A;
+    private static final int TEXT_COLOR = 0xFFFFFFFF;
+    private static final int MUTED_COLOR = 0xFFD7D7D7;
+    private static final int BAR_BACK_COLOR = 0xFF2B2B2B;
+    private static final int BAR_RUNNING_COLOR = 0xFF66BB6A;
+    private static final int PAUSED_COLOR = 0xFFFFD54F;
+    private static final int GRID_BACK_COLOR = 0xFF161616;
+    private static final int CELL_PENDING_COLOR = 0xFF3A3A3A;
+    private static final int CELL_GENERATING_COLOR = 0xFFFFD54F;
+    private static final int CELL_DONE_COLOR = 0xFF66BB6A;
+    private static final int ORIGIN_X = 6;
+    private static final int ORIGIN_Y = 6;
+    private static final int PADDING = 4;
+    private static final int ROW_GAP = 2;
+    private static final int BAR_HEIGHT = 6;
+    private static final int MIN_WIDTH = 130;
+    private static final int MINIMAP_MAX_PX = 64;
+    private static final int MINIMAP_MAX_CELL = 6;
+    private static final int MINIMAP_GAP = 4;
+
+    private IrisPregenHud() {
+    }
+
+    public static void render(GuiGraphicsExtractor graphics) {
+        if (!IrisClient.hudVisible()) {
+            return;
+        }
+        IrisMessage.PregenProgress progress = IrisClient.pregen().active();
+        if (progress == null) {
+            return;
+        }
+        Minecraft minecraft = Minecraft.getInstance();
+        if (minecraft == null || minecraft.player == null) {
+            return;
+        }
+        Font font = minecraft.font;
+        boolean paused = progress.state() == IrisMessage.PregenProgress.STATE_PAUSED;
+        double percent = progress.chunksTotal() > 0L
+                ? clampPercent((double) progress.chunksDone() / (double) progress.chunksTotal() * 100.0D)
+                : 0.0D;
+        String title = "Iris Pregen";
+        String stats = String.format("%,d / %,d  (%.1f%%)", progress.chunksDone(), progress.chunksTotal(), percent);
+        String tail = paused ? "PAUSED" : rateAndEta(progress);
+        int accent = paused ? PAUSED_COLOR : BAR_RUNNING_COLOR;
+
+        int lineHeight = font.lineHeight;
+        int contentWidth = Math.max(MIN_WIDTH, Math.max(font.width(title), Math.max(font.width(stats), font.width(tail))));
+        int contentHeight = lineHeight * 3 + ROW_GAP * 3 + BAR_HEIGHT;
+
+        IrisClientRegionMap regionMap = IrisClient.regions();
+        IrisClientRegionMap.Bounds bounds = regionMap.hasData() ? regionMap.bounds() : null;
+        boolean showMap = bounds != null;
+        int cellPx = 0;
+        int gridWidth = 0;
+        int gridHeight = 0;
+        if (showMap) {
+            int span = Math.max(bounds.regionsWide(), bounds.regionsTall());
+            cellPx = Math.max(1, Math.min(MINIMAP_MAX_CELL, MINIMAP_MAX_PX / span));
+            gridWidth = Math.min(MINIMAP_MAX_PX, bounds.regionsWide() * cellPx);
+            gridHeight = Math.min(MINIMAP_MAX_PX, bounds.regionsTall() * cellPx);
+        }
+
+        int panelWidth = showMap ? Math.max(contentWidth, gridWidth) : contentWidth;
+        int panelHeight = showMap ? contentHeight + MINIMAP_GAP + gridHeight : contentHeight;
+
+        graphics.fill(ORIGIN_X - PADDING, ORIGIN_Y - PADDING, ORIGIN_X + panelWidth + PADDING, ORIGIN_Y + panelHeight + PADDING, PANEL_COLOR);
+
+        int cursorY = ORIGIN_Y;
+        graphics.text(font, title, ORIGIN_X, cursorY, TITLE_COLOR);
+        cursorY += lineHeight + ROW_GAP;
+        graphics.text(font, stats, ORIGIN_X, cursorY, TEXT_COLOR);
+        cursorY += lineHeight + ROW_GAP;
+
+        int fillWidth = (int) Math.round(contentWidth * (percent / 100.0D));
+        graphics.fill(ORIGIN_X, cursorY, ORIGIN_X + contentWidth, cursorY + BAR_HEIGHT, BAR_BACK_COLOR);
+        if (fillWidth > 0) {
+            graphics.fill(ORIGIN_X, cursorY, ORIGIN_X + fillWidth, cursorY + BAR_HEIGHT, accent);
+        }
+        cursorY += BAR_HEIGHT + ROW_GAP;
+
+        graphics.text(font, tail, ORIGIN_X, cursorY, paused ? PAUSED_COLOR : MUTED_COLOR);
+
+        if (showMap) {
+            renderMinimap(graphics, regionMap, bounds, cellPx, gridWidth, gridHeight, ORIGIN_Y + contentHeight + MINIMAP_GAP);
+        }
+    }
+
+    private static void renderMinimap(GuiGraphicsExtractor graphics, IrisClientRegionMap regionMap, IrisClientRegionMap.Bounds bounds, int cellPx, int gridWidth, int gridHeight, int gridTop) {
+        int mapLeft = ORIGIN_X;
+        int mapRight = mapLeft + gridWidth;
+        int mapBottom = gridTop + gridHeight;
+        graphics.fill(mapLeft, gridTop, mapRight, mapBottom, GRID_BACK_COLOR);
+        int minRegionX = bounds.minRegionX();
+        int minRegionZ = bounds.minRegionZ();
+        regionMap.forEachCell((regionX, regionZ, state) -> {
+            int px = mapLeft + (regionX - minRegionX) * cellPx;
+            int py = gridTop + (regionZ - minRegionZ) * cellPx;
+            if (px + cellPx > mapRight || py + cellPx > mapBottom) {
+                return;
+            }
+            graphics.fill(px, py, px + cellPx, py + cellPx, cellColor(state));
+        });
+    }
+
+    private static int cellColor(int state) {
+        return switch (state) {
+            case IrisMessage.PregenRegionDelta.STATE_DONE -> CELL_DONE_COLOR;
+            case IrisMessage.PregenRegionDelta.STATE_GENERATING -> CELL_GENERATING_COLOR;
+            default -> CELL_PENDING_COLOR;
+        };
+    }
+
+    private static String rateAndEta(IrisMessage.PregenProgress progress) {
+        String rate = String.format("%,.0f/s", progress.chunksPerSecond());
+        if (progress.etaMillis() > 0L) {
+            return rate + "  ETA " + formatDuration(progress.etaMillis());
+        }
+        return rate;
+    }
+
+    private static String formatDuration(long etaMillis) {
+        long totalSeconds = etaMillis / 1000L;
+        long hours = totalSeconds / 3600L;
+        long minutes = (totalSeconds % 3600L) / 60L;
+        long seconds = totalSeconds % 60L;
+        if (hours > 0L) {
+            return hours + "h " + minutes + "m";
+        }
+        if (minutes > 0L) {
+            return minutes + "m " + seconds + "s";
+        }
+        return seconds + "s";
+    }
+
+    private static double clampPercent(double value) {
+        if (value < 0.0D) {
+            return 0.0D;
+        }
+        if (value > 100.0D) {
+            return 100.0D;
+        }
+        return value;
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisTileAssembler.java

@@ -0,0 +1,86 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+
+import java.util.HashMap;
+import java.util.Map;
+
+final class IrisTileAssembler {
+    private final Map<IrisTileKey, Partial> partials;
+
+    IrisTileAssembler() {
+        this.partials = new HashMap<>();
+    }
+
+    IrisTileImage add(IrisMessage.VisionTile tile) {
+        int chunkCount = tile.chunkCount();
+        int chunkIndex = tile.chunkIndex();
+        if (chunkCount <= 0 || chunkIndex < 0 || chunkIndex >= chunkCount || tile.data() == null) {
+            return null;
+        }
+        IrisTileKey key = new IrisTileKey(tile.tileX(), tile.tileZ(), tile.zoomLevel());
+        Partial partial = partials.get(key);
+        if (partial == null || tile.sequence() > partial.sequence() || partial.chunkCount() != chunkCount) {
+            if (partial != null && tile.sequence() < partial.sequence()) {
+                return null;
+            }
+            partial = new Partial(tile.sequence(), chunkCount);
+            partials.put(key, partial);
+        } else if (tile.sequence() < partial.sequence()) {
+            return null;
+        }
+        if (!partial.accept(chunkIndex, tile.data())) {
+            return null;
+        }
+        partials.remove(key);
+        return IrisTileCodec.decode(partial.concat());
+    }
+
+    void clear() {
+        partials.clear();
+    }
+
+    private static final class Partial {
+        private final int sequence;
+        private final int chunkCount;
+        private final byte[][] chunks;
+        private int received;
+
+        Partial(int sequence, int chunkCount) {
+            this.sequence = sequence;
+            this.chunkCount = chunkCount;
+            this.chunks = new byte[chunkCount][];
+            this.received = 0;
+        }
+
+        int sequence() {
+            return sequence;
+        }
+
+        int chunkCount() {
+            return chunkCount;
+        }
+
+        boolean accept(int chunkIndex, byte[] data) {
+            if (chunks[chunkIndex] == null) {
+                chunks[chunkIndex] = data;
+                received++;
+            }
+            return received >= chunkCount;
+        }
+
+        byte[] concat() {
+            int total = 0;
+            for (byte[] chunk : chunks) {
+                total += chunk.length;
+            }
+            byte[] blob = new byte[total];
+            int position = 0;
+            for (byte[] chunk : chunks) {
+                System.arraycopy(chunk, 0, blob, position, chunk.length);
+                position += chunk.length;
+            }
+            return blob;
+        }
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisTileCodec.java

@@ -0,0 +1,99 @@
+package art.arcane.iris.client;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.util.zip.DataFormatException;
+import java.util.zip.Inflater;
+
+public final class IrisTileCodec {
+    public static final int MODE_RAW_RGB = 0;
+    public static final int MODE_PALETTE = 1;
+    private static final int MAX_DIMENSION = 512;
+    private static final int OPAQUE = 0xFF000000;
+
+    private IrisTileCodec() {
+    }
+
+    public static IrisTileImage decode(byte[] deflatedBlob) {
+        if (deflatedBlob == null || deflatedBlob.length == 0) {
+            return null;
+        }
+        byte[] raw = inflate(deflatedBlob);
+        if (raw == null) {
+            return null;
+        }
+        try (DataInputStream in = new DataInputStream(new ByteArrayInputStream(raw))) {
+            int width = in.readInt();
+            int height = in.readInt();
+            if (width <= 0 || height <= 0 || width > MAX_DIMENSION || height > MAX_DIMENSION) {
+                return null;
+            }
+            int mode = in.readUnsignedByte();
+            int[] argb = new int[width * height];
+            return switch (mode) {
+                case MODE_PALETTE -> decodePalette(in, width, height, argb);
+                case MODE_RAW_RGB -> decodeRaw(in, width, height, argb);
+                default -> null;
+            };
+        } catch (IOException failure) {
+            return null;
+        }
+    }
+
+    private static IrisTileImage decodePalette(DataInputStream in, int width, int height, int[] argb) throws IOException {
+        int paletteSize = in.readInt();
+        if (paletteSize <= 0 || paletteSize > 256) {
+            return null;
+        }
+        int[] palette = new int[paletteSize];
+        for (int index = 0; index < paletteSize; index++) {
+            int red = in.readUnsignedByte();
+            int green = in.readUnsignedByte();
+            int blue = in.readUnsignedByte();
+            palette[index] = OPAQUE | red << 16 | green << 8 | blue;
+        }
+        for (int pixel = 0; pixel < argb.length; pixel++) {
+            int paletteIndex = in.readUnsignedByte();
+            if (paletteIndex >= paletteSize) {
+                return null;
+            }
+            argb[pixel] = palette[paletteIndex];
+        }
+        return new IrisTileImage(width, height, argb);
+    }
+
+    private static IrisTileImage decodeRaw(DataInputStream in, int width, int height, int[] argb) throws IOException {
+        for (int pixel = 0; pixel < argb.length; pixel++) {
+            int red = in.readUnsignedByte();
+            int green = in.readUnsignedByte();
+            int blue = in.readUnsignedByte();
+            argb[pixel] = OPAQUE | red << 16 | green << 8 | blue;
+        }
+        return new IrisTileImage(width, height, argb);
+    }
+
+    private static byte[] inflate(byte[] input) {
+        Inflater inflater = new Inflater();
+        inflater.setInput(input);
+        ByteArrayOutputStream out = new ByteArrayOutputStream(Math.max(64, input.length * 2));
+        byte[] buffer = new byte[8192];
+        try {
+            while (!inflater.finished()) {
+                int produced = inflater.inflate(buffer);
+                if (produced == 0) {
+                    if (inflater.finished() || inflater.needsInput() || inflater.needsDictionary()) {
+                        break;
+                    }
+                }
+                out.write(buffer, 0, produced);
+            }
+        } catch (DataFormatException malformed) {
+            return null;
+        } finally {
+            inflater.end();
+        }
+        return out.toByteArray();
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisTileImage.java

@@ -0,0 +1,4 @@
+package art.arcane.iris.client;
+
+public record IrisTileImage(int width, int height, int[] argb) {
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisTileKey.java

@@ -0,0 +1,4 @@
+package art.arcane.iris.client;
+
+public record IrisTileKey(int tileX, int tileZ, int zoom) {
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisToastPresenter.java

@@ -0,0 +1,35 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.components.toasts.SystemToast;
+import net.minecraft.client.gui.components.toasts.ToastManager;
+import net.minecraft.network.chat.Component;
+
+public final class IrisToastPresenter {
+    private IrisToastPresenter() {
+    }
+
+    public static void pump() {
+        Minecraft minecraft = Minecraft.getInstance();
+        if (minecraft == null || minecraft.gui == null) {
+            return;
+        }
+        ToastManager manager = minecraft.gui.toastManager();
+        IrisClientToasts toasts = IrisClient.toasts();
+        IrisClientToasts.Pending next = toasts.poll();
+        while (next != null) {
+            SystemToast.addOrUpdate(manager, tokenFor(next.kind()), Component.literal(next.title()), Component.literal(next.body()));
+            next = toasts.poll();
+        }
+    }
+
+    private static SystemToast.SystemToastId tokenFor(int kind) {
+        return switch (kind) {
+            case IrisMessage.Toast.KIND_SUCCESS -> SystemToast.SystemToastId.WORLD_BACKUP;
+            case IrisMessage.Toast.KIND_WARNING -> SystemToast.SystemToastId.UNSECURE_SERVER_WARNING;
+            case IrisMessage.Toast.KIND_ERROR -> SystemToast.SystemToastId.PACK_LOAD_FAILURE;
+            default -> SystemToast.SystemToastId.PERIODIC_NOTIFICATION;
+        };
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisVisionScreen.java

@@ -0,0 +1,328 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import com.mojang.blaze3d.platform.NativeImage;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiGraphicsExtractor;
+import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.input.MouseButtonEvent;
+import net.minecraft.client.player.LocalPlayer;
+import net.minecraft.client.renderer.RenderPipelines;
+import net.minecraft.client.renderer.texture.DynamicTexture;
+import net.minecraft.client.renderer.texture.TextureManager;
+import net.minecraft.network.chat.Component;
+import net.minecraft.resources.Identifier;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+public final class IrisVisionScreen extends Screen {
+    private static final int TILE_PIXELS = 128;
+    private static final int MIN_ZOOM = 0;
+    private static final int MAX_ZOOM = 8;
+    private static final int DEFAULT_ZOOM = 2;
+    private static final int MAX_TEXTURES = 220;
+    private static final int BACKGROUND_COLOR = 0xF00B0E14;
+    private static final int PLACEHOLDER_COLOR = 0xFF161A22;
+    private static final int GRID_COLOR = 0x33FFFFFF;
+    private static final int HEADER_COLOR = 0xC0101010;
+    private static final int TITLE_COLOR = 0xFF66BB6A;
+    private static final int TEXT_COLOR = 0xFFFFFFFF;
+    private static final int MUTED_COLOR = 0xFFB9B9B9;
+    private static final int PLAYER_FILL_COLOR = 0xFFFFDD33;
+    private static final int PLAYER_BORDER_COLOR = 0xFF101010;
+    private static final int MARKER_COLOR = 0xFF4FC3F7;
+    private static final int MARKER_LABEL_BG = 0xE0101010;
+
+    private final Map<IrisTileKey, TileTexture> textures;
+    private double centerBlockX;
+    private double centerBlockZ;
+    private int zoom;
+    private boolean initialized;
+    private String renderedDimensionKey;
+
+    public IrisVisionScreen() {
+        super(Component.literal("Iris Vision"));
+        this.textures = new LinkedHashMap<>(64, 0.75f, true);
+        this.centerBlockX = 0.0D;
+        this.centerBlockZ = 0.0D;
+        this.zoom = DEFAULT_ZOOM;
+        this.initialized = false;
+        this.renderedDimensionKey = null;
+    }
+
+    @Override
+    protected void init() {
+        if (!initialized) {
+            centerOnPlayer();
+            initialized = true;
+        }
+    }
+
+    @Override
+    public boolean isPauseScreen() {
+        return false;
+    }
+
+    @Override
+    public void extractRenderState(GuiGraphicsExtractor graphics, int mouseX, int mouseY, float partialTick) {
+        graphics.fill(0, 0, width, height, BACKGROUND_COLOR);
+        IrisClientSession session = IrisClient.session();
+        if (!session.isReady()) {
+            drawCentered(graphics, "Connecting to Iris server...", MUTED_COLOR);
+            drawHeader(graphics, "Iris Vision", "not connected");
+            return;
+        }
+        IrisMessage.DimensionStatus status = IrisClient.dimension().status();
+        if (!IrisClient.visionAvailable() || status == null) {
+            drawCentered(graphics, "Not an Iris world", MUTED_COLOR);
+            drawHeader(graphics, "Iris Vision", status == null ? "no dimension data" : label(status));
+            return;
+        }
+        syncWorld(status);
+        renderTiles(graphics, mouseX, mouseY, status);
+    }
+
+    @Override
+    public boolean mouseClicked(MouseButtonEvent event, boolean doubleClick) {
+        return true;
+    }
+
+    @Override
+    public boolean mouseDragged(MouseButtonEvent event, double dragX, double dragY) {
+        int blocksPerPixel = 1 << zoom;
+        centerBlockX -= dragX * blocksPerPixel;
+        centerBlockZ -= dragY * blocksPerPixel;
+        return true;
+    }
+
+    @Override
+    public boolean mouseScrolled(double mouseX, double mouseY, double scrollX, double scrollY) {
+        if (scrollY == 0.0D) {
+            return false;
+        }
+        int previousBlocksPerPixel = 1 << zoom;
+        double anchorBlockX = centerBlockX + (mouseX - width / 2.0D) * previousBlocksPerPixel;
+        double anchorBlockZ = centerBlockZ + (mouseY - height / 2.0D) * previousBlocksPerPixel;
+        int updated = zoom + (scrollY > 0.0D ? -1 : 1);
+        zoom = Math.max(MIN_ZOOM, Math.min(updated, MAX_ZOOM));
+        int newBlocksPerPixel = 1 << zoom;
+        centerBlockX = anchorBlockX - (mouseX - width / 2.0D) * newBlocksPerPixel;
+        centerBlockZ = anchorBlockZ - (mouseY - height / 2.0D) * newBlocksPerPixel;
+        return true;
+    }
+
+    @Override
+    public void removed() {
+        releaseTextures();
+        super.removed();
+    }
+
+    private void renderTiles(GuiGraphicsExtractor graphics, int mouseX, int mouseY, IrisMessage.DimensionStatus status) {
+        int blocksPerPixel = 1 << zoom;
+        int tileSpanBlocks = TILE_PIXELS * blocksPerPixel;
+        int originX = (int) Math.floor(width / 2.0D - centerBlockX / blocksPerPixel);
+        int originY = (int) Math.floor(height / 2.0D - centerBlockZ / blocksPerPixel);
+        int minTileX = (int) Math.floor((0.0D - originX) / TILE_PIXELS) - 1;
+        int maxTileX = (int) Math.floor((width - originX) / (double) TILE_PIXELS) + 1;
+        int minTileZ = (int) Math.floor((0.0D - originY) / TILE_PIXELS) - 1;
+        int maxTileZ = (int) Math.floor((height - originY) / (double) TILE_PIXELS) + 1;
+        int centerTileX = Math.floorDiv((int) Math.floor(centerBlockX), tileSpanBlocks);
+        int centerTileZ = Math.floorDiv((int) Math.floor(centerBlockZ), tileSpanBlocks);
+
+        IrisClientTileCache cache = IrisClient.tiles();
+        cache.resetRequestQueue();
+        List<IrisTileKey> missing = new ArrayList<>();
+
+        for (int tileX = minTileX; tileX <= maxTileX; tileX++) {
+            for (int tileZ = minTileZ; tileZ <= maxTileZ; tileZ++) {
+                int screenX = originX + tileX * TILE_PIXELS;
+                int screenY = originY + tileZ * TILE_PIXELS;
+                IrisTileKey key = new IrisTileKey(tileX, tileZ, zoom);
+                IrisTileImage image = cache.get(key);
+                if (image == null) {
+                    graphics.fill(screenX, screenY, screenX + TILE_PIXELS, screenY + TILE_PIXELS, PLACEHOLDER_COLOR);
+                    missing.add(key);
+                    continue;
+                }
+                Identifier texture = ensureTexture(key, image);
+                graphics.blit(RenderPipelines.GUI_TEXTURED, texture, screenX, screenY, 0.0F, 0.0F, TILE_PIXELS, TILE_PIXELS, TILE_PIXELS, TILE_PIXELS);
+            }
+        }
+
+        requestMissing(cache, missing, centerTileX, centerTileZ);
+        cache.pump();
+        evictTextures();
+
+        drawMarkers(graphics, mouseX, mouseY, minTileX, maxTileX, minTileZ, maxTileZ, originX, originY, blocksPerPixel);
+        drawPlayer(graphics, blocksPerPixel);
+        drawHeader(graphics, "Iris Vision", label(status) + "  zoom " + zoom + "  x" + (long) centerBlockX + " z" + (long) centerBlockZ);
+        drawFooter(graphics, "Drag to pan   Scroll to zoom   Esc to close");
+    }
+
+    private void requestMissing(IrisClientTileCache cache, List<IrisTileKey> missing, int centerTileX, int centerTileZ) {
+        missing.sort((left, right) -> Long.compare(distanceSquared(left, centerTileX, centerTileZ), distanceSquared(right, centerTileX, centerTileZ)));
+        for (IrisTileKey key : missing) {
+            cache.request(key);
+        }
+    }
+
+    private void drawMarkers(GuiGraphicsExtractor graphics, int mouseX, int mouseY, int minTileX, int maxTileX, int minTileZ, int maxTileZ, int originX, int originY, int blocksPerPixel) {
+        IrisClientMarkers markers = IrisClient.markers();
+        String hoverLabel = null;
+        int hoverX = 0;
+        int hoverY = 0;
+        for (int tileX = minTileX; tileX <= maxTileX; tileX++) {
+            for (int tileZ = minTileZ; tileZ <= maxTileZ; tileZ++) {
+                List<IrisMessage.VisionMarkers.Marker> tileMarkers = markers.forTile(new IrisTileKey(tileX, tileZ, zoom));
+                if (tileMarkers == null) {
+                    continue;
+                }
+                for (IrisMessage.VisionMarkers.Marker marker : tileMarkers) {
+                    int screenX = originX + (int) Math.floor((double) marker.blockX() / blocksPerPixel);
+                    int screenY = originY + (int) Math.floor((double) marker.blockZ() / blocksPerPixel);
+                    graphics.fill(screenX - 2, screenY - 2, screenX + 2, screenY + 2, MARKER_COLOR);
+                    if (Math.abs(mouseX - screenX) <= 4 && Math.abs(mouseY - screenY) <= 4 && marker.label() != null && !marker.label().isEmpty()) {
+                        hoverLabel = marker.label();
+                        hoverX = screenX;
+                        hoverY = screenY;
+                    }
+                }
+            }
+        }
+        if (hoverLabel != null) {
+            int labelWidth = font.width(hoverLabel);
+            graphics.fill(hoverX + 6, hoverY - 6, hoverX + 12 + labelWidth, hoverY + font.lineHeight, MARKER_LABEL_BG);
+            graphics.text(font, hoverLabel, hoverX + 9, hoverY - 4, TEXT_COLOR);
+        }
+    }
+
+    private void drawPlayer(GuiGraphicsExtractor graphics, int blocksPerPixel) {
+        LocalPlayer player = Minecraft.getInstance().player;
+        if (player == null) {
+            return;
+        }
+        int screenX = (int) Math.round(width / 2.0D + (player.getBlockX() - centerBlockX) / blocksPerPixel);
+        int screenY = (int) Math.round(height / 2.0D + (player.getBlockZ() - centerBlockZ) / blocksPerPixel);
+        graphics.fill(screenX - 4, screenY - 4, screenX + 4, screenY + 4, PLAYER_BORDER_COLOR);
+        graphics.fill(screenX - 3, screenY - 3, screenX + 3, screenY + 3, PLAYER_FILL_COLOR);
+    }
+
+    private void drawHeader(GuiGraphicsExtractor graphics, String title, String detail) {
+        int lineHeight = font.lineHeight;
+        int headerHeight = lineHeight + 8;
+        graphics.fill(0, 0, width, headerHeight, HEADER_COLOR);
+        graphics.text(font, title, 8, 4, TITLE_COLOR);
+        graphics.text(font, detail, 12 + font.width(title), 4, MUTED_COLOR);
+    }
+
+    private void drawFooter(GuiGraphicsExtractor graphics, String hint) {
+        int lineHeight = font.lineHeight;
+        int footerTop = height - lineHeight - 8;
+        graphics.fill(0, footerTop, width, height, HEADER_COLOR);
+        graphics.text(font, hint, 8, footerTop + 4, MUTED_COLOR);
+    }
+
+    private void drawCentered(GuiGraphicsExtractor graphics, String text, int color) {
+        graphics.text(font, text, (width - font.width(text)) / 2, height / 2 - font.lineHeight / 2, color);
+    }
+
+    private Identifier ensureTexture(IrisTileKey key, IrisTileImage image) {
+        TileTexture existing = textures.get(key);
+        if (existing != null) {
+            return existing.id();
+        }
+        int tileWidth = image.width();
+        int tileHeight = image.height();
+        int[] argb = image.argb();
+        NativeImage nativeImage = new NativeImage(NativeImage.Format.RGBA, tileWidth, tileHeight, false);
+        for (int y = 0; y < tileHeight; y++) {
+            int row = y * tileWidth;
+            for (int x = 0; x < tileWidth; x++) {
+                nativeImage.setPixelABGR(x, y, toAbgr(argb[row + x]));
+            }
+        }
+        DynamicTexture texture = new DynamicTexture(() -> "iris_vision_tile", nativeImage);
+        Identifier id = Identifier.fromNamespaceAndPath("irisworldgen", texturePath(key));
+        Minecraft.getInstance().getTextureManager().register(id, texture);
+        textures.put(key, new TileTexture(id, texture));
+        return id;
+    }
+
+    private void evictTextures() {
+        if (textures.size() <= MAX_TEXTURES) {
+            return;
+        }
+        TextureManager manager = Minecraft.getInstance().getTextureManager();
+        Iterator<Map.Entry<IrisTileKey, TileTexture>> iterator = textures.entrySet().iterator();
+        while (textures.size() > MAX_TEXTURES && iterator.hasNext()) {
+            Map.Entry<IrisTileKey, TileTexture> entry = iterator.next();
+            manager.release(entry.getValue().id());
+            iterator.remove();
+        }
+    }
+
+    private void releaseTextures() {
+        Minecraft minecraft = Minecraft.getInstance();
+        if (minecraft != null) {
+            TextureManager manager = minecraft.getTextureManager();
+            for (TileTexture texture : textures.values()) {
+                manager.release(texture.id());
+            }
+        }
+        textures.clear();
+    }
+
+    private void syncWorld(IrisMessage.DimensionStatus status) {
+        if (renderedDimensionKey == null) {
+            renderedDimensionKey = status.dimensionKey();
+            return;
+        }
+        if (!renderedDimensionKey.equals(status.dimensionKey())) {
+            renderedDimensionKey = status.dimensionKey();
+            releaseTextures();
+            centerOnPlayer();
+        }
+    }
+
+    private void centerOnPlayer() {
+        LocalPlayer player = Minecraft.getInstance().player;
+        if (player != null) {
+            centerBlockX = player.getBlockX();
+            centerBlockZ = player.getBlockZ();
+        }
+    }
+
+    private static long distanceSquared(IrisTileKey key, int centerTileX, int centerTileZ) {
+        long deltaX = (long) key.tileX() - centerTileX;
+        long deltaZ = (long) key.tileZ() - centerTileZ;
+        return deltaX * deltaX + deltaZ * deltaZ;
+    }
+
+    private static int toAbgr(int argb) {
+        int alpha = argb >>> 24 & 0xFF;
+        int red = argb >> 16 & 0xFF;
+        int green = argb >> 8 & 0xFF;
+        int blue = argb & 0xFF;
+        return alpha << 24 | blue << 16 | green << 8 | red;
+    }
+
+    private static String texturePath(IrisTileKey key) {
+        return "vision/t_" + safe(key.tileX()) + "_" + safe(key.tileZ()) + "_" + key.zoom();
+    }
+
+    private static String safe(int value) {
+        return value < 0 ? "m" + (-(long) value) : Integer.toString(value);
+    }
+
+    private static String label(IrisMessage.DimensionStatus status) {
+        String pack = status.packKey() == null || status.packKey().isEmpty() ? "" : "  pack " + status.packKey();
+        return status.dimensionKey() + pack;
+    }
+
+    private record TileTexture(Identifier id, DynamicTexture texture) {
+    }
+}

adapters/client-common/src/main/java/art/arcane/iris/client/IrisWhatOverlay.java

@@ -0,0 +1,85 @@
+package art.arcane.iris.client;
+
+import art.arcane.iris.spi.protocol.IrisMessage;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Font;
+import net.minecraft.client.gui.GuiGraphicsExtractor;
+import net.minecraft.client.player.LocalPlayer;
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.phys.BlockHitResult;
+import net.minecraft.world.phys.HitResult;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public final class IrisWhatOverlay {
+    private static final int PANEL_COLOR = 0xC0101010;
+    private static final int TITLE_COLOR = 0xFF66BB6A;
+    private static final int TEXT_COLOR = 0xFFFFFFFF;
+    private static final int MUTED_COLOR = 0xFFC7C7C7;
+    private static final int PADDING = 4;
+    private static final int ROW_GAP = 2;
+    private static final int CURSOR_OFFSET = 12;
+
+    private IrisWhatOverlay() {
+    }
+
+    public static void render(GuiGraphicsExtractor graphics) {
+        if (!IrisClient.whatVisible() || !IrisClient.cursorAvailable()) {
+            return;
+        }
+        Minecraft minecraft = Minecraft.getInstance();
+        if (minecraft == null || minecraft.player == null) {
+            return;
+        }
+        LocalPlayer player = minecraft.player;
+        int blockX = player.getBlockX();
+        int blockZ = player.getBlockZ();
+        HitResult hit = minecraft.hitResult;
+        if (hit != null && hit.getType() == HitResult.Type.BLOCK && hit instanceof BlockHitResult blockHit) {
+            BlockPos pos = blockHit.getBlockPos();
+            blockX = pos.getX();
+            blockZ = pos.getZ();
+        }
+        IrisClient.cursor().requestFor(blockX, blockZ);
+
+        IrisMessage.CursorInfo info = IrisClient.cursor().latest();
+        List<String> lines = new ArrayList<>();
+        if (info == null) {
+            lines.add("querying " + blockX + ", " + blockZ + "...");
+        } else {
+            lines.add("Biome: " + display(info.biomeKey()));
+            lines.add("Region: " + display(info.regionKey()));
+            if (info.caveBiomeKey() != null && !info.caveBiomeKey().isEmpty()) {
+                lines.add("Cave: " + display(info.caveBiomeKey()));
+            }
+            lines.add("Height: " + info.height() + "   (" + info.blockX() + ", " + info.blockZ() + ")");
+        }
+        draw(graphics, minecraft.font, lines);
+    }
+
+    private static void draw(GuiGraphicsExtractor graphics, Font font, List<String> lines) {
+        int lineHeight = font.lineHeight;
+        int contentWidth = font.width("Iris What");
+        for (String line : lines) {
+            contentWidth = Math.max(contentWidth, font.width(line));
+        }
+        int originX = graphics.guiWidth() / 2 + CURSOR_OFFSET;
+        int originY = graphics.guiHeight() / 2 + CURSOR_OFFSET;
+        int rows = lines.size() + 1;
+        int contentHeight = lineHeight * rows + ROW_GAP * rows;
+        graphics.fill(originX - PADDING, originY - PADDING, originX + contentWidth + PADDING, originY + contentHeight + PADDING, PANEL_COLOR);
+
+        int cursorY = originY;
+        graphics.text(font, "Iris What", originX, cursorY, TITLE_COLOR);
+        cursorY += lineHeight + ROW_GAP;
+        for (String line : lines) {
+            graphics.text(font, line, originX, cursorY, line.startsWith("Height") ? MUTED_COLOR : TEXT_COLOR);
+            cursorY += lineHeight + ROW_GAP;
+        }
+    }
+
+    private static String display(String key) {
+        return key == null || key.isEmpty() ? "-" : key;
+    }
+}

adapters/fabric/build.gradle

@@ -0,0 +1,221 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+import org.gradle.api.tasks.compile.JavaCompile
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+
+plugins {
+    id 'java'
+    id 'net.fabricmc.fabric-loom' version '1.17.11'
+    alias(libs.plugins.shadow)
+}
+
+Properties rootProperties = new Properties()
+file('../../gradle.properties').withInputStream { InputStream stream -> rootProperties.load(stream) }
+String irisVersion = providers.gradleProperty('irisVersion').getOrElse(rootProperties.getProperty('irisVersion', '4.0.0-26.2'))
+String minecraftVersion = providers.gradleProperty('minecraftVersion').getOrElse(rootProperties.getProperty('minecraftVersion', '26.2'))
+String fabricLoaderVersion = providers.gradleProperty('fabricLoaderVersion').getOrElse(rootProperties.getProperty('fabricLoaderVersion', '0.19.3'))
+String volmLibCoordinate = providers.gradleProperty('volmLibCoordinate').getOrElse(rootProperties.getProperty('volmLibCoordinate', 'com.github.VolmitSoftware:VolmLib:cdf7e8bb880199734dacd386a6616bda799fcde1'))
+Closure<String> irisArtifactName = { String platform, String targetVersion ->
+    return "Iris v${project.version} [${platform}] ${targetVersion}.jar"
+}
+
+group = 'art.arcane'
+version = irisVersion
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(25)
+    }
+}
+
+sourceSets {
+    main {
+        java {
+            srcDir '../modded-common/src/main/java'
+            srcDir '../client-common/src/main/java'
+        }
+        resources {
+            srcDir '../modded-common/src/main/resources'
+        }
+    }
+    test {
+        java {
+            srcDir '../modded-common/src/test/java'
+        }
+    }
+}
+
+repositories {
+    mavenCentral()
+    maven {
+        name = 'FabricMC'
+        url = uri('https://maven.fabricmc.net/')
+    }
+    maven { url = uri('https://repo.codemc.org/repository/maven-public/') }
+    maven { url = uri('https://jitpack.io') }
+    maven { url = uri('https://hub.spigotmc.org/nexus/content/repositories/snapshots/') }
+}
+
+configurations {
+    bundle {
+        canBeConsumed = false
+        canBeResolved = true
+    }
+    devBundle {
+        canBeConsumed = false
+        canBeResolved = true
+    }
+}
+
+configurations.named('bundle').configure {
+    exclude(group: 'com.google.code.gson')
+    exclude(group: 'com.google.guava')
+    exclude(group: 'commons-io')
+    exclude(group: 'org.apache.commons', module: 'commons-lang3')
+    exclude(group: 'it.unimi.dsi', module: 'fastutil')
+    exclude(group: 'org.slf4j')
+    exclude(group: 'org.apache.logging.log4j')
+    exclude(group: 'de.crazydev22.slimjar.helper')
+    exclude(group: 'de.crazydev22.slimjar')
+    exclude(group: 'io.github.slimjar')
+}
+
+configurations.compileClasspath.extendsFrom(configurations.devBundle)
+configurations.runtimeClasspath.extendsFrom(configurations.devBundle)
+
+configurations.create('jij') {
+    transitive = true
+}
+
+dependencies {
+    minecraft("com.mojang:minecraft:${minecraftVersion}")
+    implementation("net.fabricmc:fabric-loader:${fabricLoaderVersion}")
+    testImplementation('junit:junit:4.13.2')
+    List<Object> fabricApi = [
+        libs.fabricApi.base,
+        libs.fabricApi.registrySync,
+        libs.fabricApi.resourceLoader,
+        libs.fabricApi.lifecycleEvents,
+        libs.fabricApi.commandApi,
+        libs.fabricApi.eventsInteraction,
+        libs.fabricApi.networking,
+        libs.fabricApi.rendering,
+        libs.fabricApi.keyMapping
+    ]
+    fabricApi.each { Object notation ->
+        add('jij', notation)
+        add('implementation', notation)
+    }
+    compileOnly('org.slf4j:slf4j-api:2.0.17')
+    compileOnly(libs.spigot) {
+        transitive = false
+    }
+
+    List<Object> shared = [
+        "art.arcane:core:${irisVersion}".toString(),
+        "art.arcane:spi:${irisVersion}".toString(),
+        volmLibCoordinate,
+        libs.paralithic,
+        libs.lru,
+        libs.kotlin.stdlib,
+        libs.kotlin.coroutines,
+        libs.commons.lang,
+        libs.commons.math3,
+        libs.caffeine,
+        libs.lz4,
+        libs.zip,
+        libs.sentry,
+        libs.oshi,
+        libs.byteBuddy.core,
+        libs.byteBuddy.agent
+    ]
+    shared.each { Object notation ->
+        add('bundle', notation)
+        add('devBundle', notation)
+    }
+}
+
+tasks.named('compileJava', JavaCompile).configure {
+    options.encoding = 'UTF-8'
+    options.release.set(25)
+}
+
+loom {
+    accessWidenerPath = file('src/main/resources/irisworldgen.accesswidener')
+    runs {
+        server {
+            String parity = providers.gradleProperty('irisParity').getOrNull()
+            if (parity != null) {
+                property('iris.parity', parity)
+            }
+            String parityGolden = providers.gradleProperty('irisParityGolden').getOrNull()
+            if (parityGolden != null) {
+                property('iris.parity.golden', parityGolden)
+            }
+            String parityDeep = providers.gradleProperty('irisParityDeep').getOrNull()
+            if (parityDeep != null) {
+                property('iris.parity.deep', parityDeep)
+            }
+            String worldCheck = providers.gradleProperty('irisWorldCheck').getOrNull()
+            if (worldCheck != null) {
+                property('iris.worldcheck', worldCheck)
+            }
+            vmArg('-Xmx8G')
+            programArgs('nogui')
+        }
+    }
+}
+
+processResources {
+    inputs.property('version', project.version)
+    inputs.property('minecraftVersion', minecraftVersion)
+    filesMatching('fabric.mod.json') {
+        expand('version': project.version, 'minecraftVersion': minecraftVersion)
+    }
+}
+
+tasks.named('shadowJar', ShadowJar).configure {
+    doFirst {
+        delete(layout.buildDirectory.file("libs/Iris-${project.version}+mc${minecraftVersion}-fabric.jar"))
+    }
+    archiveFileName.set(irisArtifactName('Fabric', "${minecraftVersion}+${fabricLoaderVersion}"))
+    configurations = [project.configurations.named('bundle').get()]
+    mergeServiceFiles()
+    exclude('META-INF/maven/**')
+    exclude('META-INF/proguard/**')
+    exclude('META-INF/*.SF')
+    exclude('META-INF/*.DSA')
+    exclude('META-INF/*.RSA')
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    relocate('org.objectweb.asm', 'art.arcane.iris.shadow.asm')
+    relocate('io.sentry', 'art.arcane.iris.shadow.sentry')
+    relocate('com.sun.jna', 'art.arcane.iris.shadow.jna')
+    relocate('oshi', 'art.arcane.iris.shadow.oshi')
+    relocate('net.jpountz', 'art.arcane.iris.shadow.jpountz')
+    exclude('oshi.properties')
+    from(project.configurations.named('jij')) {
+        into('META-INF/jars')
+        rename { String fileName -> fileName.replaceAll(/-[0-9][^-]*\.jar$/, '.jar') }
+    }
+}
+
+tasks.named('assemble').configure {
+    dependsOn(tasks.named('shadowJar'))
+}

adapters/fabric/gradle.properties

@@ -0,0 +1,5 @@
+org.gradle.daemon=true
+org.gradle.parallel=true
+org.gradle.jvmargs=-Xmx3072m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+org.gradle.caching=true
+org.gradle.configuration-cache=false

adapters/fabric/settings.gradle

@@ -0,0 +1,95 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import java.io.File
+
+pluginManagement {
+    repositories {
+        maven {
+            name = 'FabricMC'
+            url = uri('https://maven.fabricmc.net/')
+        }
+        gradlePluginPortal()
+        mavenCentral()
+    }
+}
+
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
+}
+
+rootProject.name = 'iris-fabric'
+
+dependencyResolutionManagement {
+    versionCatalogs {
+        libs {
+            from(files('../../gradle/libs.versions.toml'))
+        }
+    }
+}
+
+boolean hasVolmLibSettings(File directory) {
+    new File(directory, 'settings.gradle.kts').exists() || new File(directory, 'settings.gradle').exists()
+}
+
+File resolveLocalVolmLibDirectory() {
+    String configuredPath = providers.gradleProperty('localVolmLibDirectory')
+        .orElse(providers.environmentVariable('VOLMLIB_DIR'))
+        .orNull
+    if (configuredPath != null && !configuredPath.isBlank()) {
+        File configuredDirectory = file(configuredPath)
+        if (hasVolmLibSettings(configuredDirectory)) {
+            return configuredDirectory
+        }
+    }
+
+    File currentDirectory = settingsDir
+    while (currentDirectory != null) {
+        File candidate = new File(currentDirectory, 'VolmLib')
+        if (hasVolmLibSettings(candidate)) {
+            return candidate
+        }
+
+        currentDirectory = currentDirectory.parentFile
+    }
+
+    null
+}
+
+boolean useLocalVolmLib = providers.gradleProperty('useLocalVolmLib')
+    .orElse('true')
+    .map { String value -> value.equalsIgnoreCase('true') }
+    .get()
+File localVolmLibDirectory = resolveLocalVolmLibDirectory()
+
+if (useLocalVolmLib && localVolmLibDirectory != null) {
+    includeBuild(localVolmLibDirectory) {
+        dependencySubstitution {
+            substitute(module('com.github.VolmitSoftware:VolmLib')).using(project(':shared'))
+            substitute(module('com.github.VolmitSoftware.VolmLib:shared')).using(project(':shared'))
+            substitute(module('com.github.VolmitSoftware.VolmLib:volmlib-shared')).using(project(':shared'))
+        }
+    }
+}
+
+includeBuild('../..') {
+    dependencySubstitution {
+        substitute(module('art.arcane:core')).using(project(':core'))
+        substitute(module('art.arcane:spi')).using(project(':spi'))
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/FabricForcedDatapackSources.java

@@ -0,0 +1,48 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric;
+
+import art.arcane.iris.modded.ModdedForcedDatapack;
+import net.minecraft.server.packs.repository.PackRepository;
+import net.minecraft.server.packs.repository.RepositorySource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+public final class FabricForcedDatapackSources {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+
+    private FabricForcedDatapackSources() {
+    }
+
+    public static void attach(PackRepository repository) {
+        if (repository == null) {
+            return;
+        }
+        try {
+            Set<RepositorySource> merged = new LinkedHashSet<>(repository.sources);
+            merged.add(ModdedForcedDatapack.repositorySource());
+            repository.sources = merged;
+        } catch (Throwable e) {
+            LOGGER.error("Iris failed to attach the forced startup datapack source to the server data pack repository", e);
+        }
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/FabricModdedLoader.java

@@ -0,0 +1,73 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric;
+
+import art.arcane.iris.modded.ModdedLoader;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.loader.api.FabricLoader;
+import net.fabricmc.loader.api.ModContainer;
+import net.minecraft.server.MinecraftServer;
+
+import java.io.File;
+import java.nio.file.Path;
+
+public final class FabricModdedLoader implements ModdedLoader {
+    @Override
+    public String platformName() {
+        return "fabric";
+    }
+
+    @Override
+    public String minecraftVersion() {
+        return FabricLoader.getInstance().getModContainer("minecraft")
+                .map((ModContainer container) -> container.getMetadata().getVersion().getFriendlyString())
+                .orElse("unknown");
+    }
+
+    @Override
+    public String modVersion() {
+        return FabricLoader.getInstance().getModContainer("irisworldgen")
+                .map((ModContainer container) -> container.getMetadata().getVersion().getFriendlyString())
+                .orElse("unknown");
+    }
+
+    @Override
+    public MinecraftServer currentServer() {
+        Object instance = FabricLoader.getInstance().getGameInstance();
+        return instance instanceof MinecraftServer server ? server : null;
+    }
+
+    @Override
+    public boolean clientEnvironment() {
+        return FabricLoader.getInstance().getEnvironmentType() == EnvType.CLIENT;
+    }
+
+    @Override
+    public Path configDir() {
+        return FabricLoader.getInstance().getConfigDir();
+    }
+
+    @Override
+    public File modJar() {
+        return FabricLoader.getInstance().getModContainer("irisworldgen")
+                .flatMap((ModContainer container) -> container.getOrigin().getPaths().stream().findFirst())
+                .map((Path p) -> p.toFile())
+                .orElse(null);
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/FabricProtocolNetworking.java

@@ -0,0 +1,54 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric;
+
+import art.arcane.iris.modded.ModdedIrisPayload;
+import art.arcane.iris.modded.ModdedProtocolChannel;
+import art.arcane.iris.modded.ModdedProtocolHandler;
+import net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking;
+import net.minecraft.server.level.ServerPlayer;
+
+public final class FabricProtocolNetworking {
+    private FabricProtocolNetworking() {
+    }
+
+    public static void install() {
+        PayloadTypeRegistry.clientboundPlay().register(ModdedIrisPayload.TYPE, ModdedIrisPayload.STREAM_CODEC);
+        PayloadTypeRegistry.serverboundPlay().register(ModdedIrisPayload.TYPE, ModdedIrisPayload.STREAM_CODEC);
+        ServerPlayNetworking.registerGlobalReceiver(ModdedIrisPayload.TYPE,
+                (payload, context) -> ModdedProtocolHandler.onInbound(context.player(), payload.data()));
+        ServerPlayConnectionEvents.JOIN.register((handler, sender, server) -> ModdedProtocolHandler.onPlayerJoin(handler.player));
+        ServerPlayConnectionEvents.DISCONNECT.register((handler, server) -> ModdedProtocolHandler.onPlayerDisconnect(handler.player));
+        ModdedProtocolHandler.bindChannel(new FabricProtocolChannel());
+    }
+
+    private static final class FabricProtocolChannel implements ModdedProtocolChannel {
+        @Override
+        public boolean canReceive(ServerPlayer player) {
+            return ServerPlayNetworking.canSend(player, ModdedIrisPayload.TYPE);
+        }
+
+        @Override
+        public void send(ServerPlayer player, ModdedIrisPayload payload) {
+            ServerPlayNetworking.send(player, payload);
+        }
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/IrisFabricBootstrap.java

@@ -0,0 +1,65 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric;
+
+import art.arcane.iris.modded.IrisModdedChunkGenerator;
+import art.arcane.iris.modded.ModdedEngineBootstrap;
+import art.arcane.iris.modded.command.IrisModdedCommands;
+import art.arcane.iris.modded.command.ModdedWandService;
+import com.mojang.brigadier.CommandDispatcher;
+import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
+import net.fabricmc.fabric.api.event.player.AttackBlockCallback;
+import net.fabricmc.fabric.api.event.player.UseBlockCallback;
+import net.minecraft.commands.CommandBuildContext;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.commands.Commands;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.phys.BlockHitResult;
+
+public final class IrisFabricBootstrap implements ModInitializer {
+    @Override
+    public void onInitialize() {
+        ModdedEngineBootstrap.bootCommon(new FabricModdedLoader(), "Fabric",
+            () -> Registry.register(BuiltInRegistries.CHUNK_GENERATOR, Identifier.fromNamespaceAndPath("irisworldgen", "iris"), IrisModdedChunkGenerator.CODEC));
+        FabricProtocolNetworking.install();
+        ServerLifecycleEvents.SERVER_STARTING.register((MinecraftServer server) -> ModdedEngineBootstrap.start(server));
+        ServerLifecycleEvents.SERVER_STOPPING.register((MinecraftServer server) -> ModdedEngineBootstrap.stop());
+        CommandRegistrationCallback.EVENT.register((CommandDispatcher<CommandSourceStack> dispatcher, CommandBuildContext buildContext, Commands.CommandSelection selection) -> IrisModdedCommands.register(dispatcher));
+        AttackBlockCallback.EVENT.register((Player player, Level level, InteractionHand hand, BlockPos pos, Direction direction) ->
+                ModdedWandService.attackBlock(player, level, hand, pos) ? InteractionResult.SUCCESS : InteractionResult.PASS);
+        UseBlockCallback.EVENT.register((Player player, Level level, InteractionHand hand, BlockHitResult hit) ->
+                ModdedWandService.useBlock(player, level, hand, hit.getBlockPos()) ? InteractionResult.SUCCESS : InteractionResult.PASS);
+        ServerTickEvents.END_SERVER_TICK.register((MinecraftServer server) -> {
+            ModdedEngineBootstrap.tick(server);
+            ModdedWandService.serverTick(server);
+        });
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/IrisFabricClient.java

@@ -0,0 +1,50 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric;
+
+import art.arcane.iris.client.IrisClient;
+import art.arcane.iris.client.IrisClientHud;
+import art.arcane.iris.client.IrisClientKeybinds;
+import art.arcane.iris.modded.ModdedIrisPayload;
+import net.fabricmc.api.ClientModInitializer;
+import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
+import net.fabricmc.fabric.api.client.keymapping.v1.KeyMappingHelper;
+import net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents;
+import net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking;
+import net.fabricmc.fabric.api.client.rendering.v1.hud.HudElementRegistry;
+
+public final class IrisFabricClient implements ClientModInitializer {
+    @Override
+    public void onInitializeClient() {
+        ClientPlayNetworking.registerGlobalReceiver(ModdedIrisPayload.TYPE,
+                (payload, context) -> IrisClient.onInbound(payload.data()));
+        IrisClient.bindSender(frame -> {
+            if (ClientPlayNetworking.canSend(ModdedIrisPayload.TYPE)) {
+                ClientPlayNetworking.send(new ModdedIrisPayload(frame));
+            }
+        });
+        ClientPlayConnectionEvents.JOIN.register((handler, sender, client) -> IrisClient.onWorldJoin());
+        ClientPlayConnectionEvents.DISCONNECT.register((handler, client) -> IrisClient.onDisconnect());
+        KeyMappingHelper.registerKeyMapping(IrisClientKeybinds.TOGGLE_HUD);
+        KeyMappingHelper.registerKeyMapping(IrisClientKeybinds.OPEN_MAP);
+        KeyMappingHelper.registerKeyMapping(IrisClientKeybinds.TOGGLE_WHAT);
+        HudElementRegistry.addLast(IrisClient.HUD_ELEMENT_ID, (graphics, delta) -> IrisClientHud.render(graphics));
+        ClientTickEvents.END_CLIENT_TICK.register(client -> IrisClientKeybinds.pollToggle());
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/mixin/LivingEntityMixin.java

@@ -0,0 +1,35 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric.mixin;
+
+import art.arcane.iris.modded.ModdedDeathLoot;
+import net.minecraft.world.damagesource.DamageSource;
+import net.minecraft.world.entity.LivingEntity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(LivingEntity.class)
+public class LivingEntityMixin {
+    @Inject(method = "die", at = @At("TAIL"))
+    private void iris$dropIrisDeathLoot(DamageSource damageSource, CallbackInfo info) {
+        ModdedDeathLoot.handle((LivingEntity) (Object) this);
+    }
+}

adapters/fabric/src/main/java/art/arcane/iris/fabric/mixin/ServerPacksSourceMixin.java

@@ -0,0 +1,36 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.fabric.mixin;
+
+import art.arcane.iris.fabric.FabricForcedDatapackSources;
+import net.minecraft.server.packs.repository.PackRepository;
+import net.minecraft.server.packs.repository.ServerPacksSource;
+import net.minecraft.world.level.storage.LevelStorageSource;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(ServerPacksSource.class)
+public class ServerPacksSourceMixin {
+    @Inject(method = "createPackRepository(Lnet/minecraft/world/level/storage/LevelStorageSource$LevelStorageAccess;)Lnet/minecraft/server/packs/repository/PackRepository;", at = @At("RETURN"))
+    private static void iris$addForcedDatapackSource(LevelStorageSource.LevelStorageAccess storage, CallbackInfoReturnable<PackRepository> info) {
+        FabricForcedDatapackSources.attach(info.getReturnValue());
+    }
+}

adapters/fabric/src/main/resources/fabric.mod.json

@@ -0,0 +1,36 @@
+{
+  "schemaVersion": 1,
+  "id": "irisworldgen",
+  "version": "${version}",
+  "name": "Iris",
+  "description": "Iris World Generation Engine (Fabric adapter - native chunk generator, explicit Iris world datapack workflow, engine lifecycle)",
+  "authors": ["Arcane Arts (Volmit Software)"],
+  "contact": {
+    "sources": "https://github.com/VolmitSoftware/Iris"
+  },
+  "license": "GPL-3.0",
+  "environment": "*",
+  "accessWidener": "irisworldgen.accesswidener",
+  "mixins": ["irisworldgen.mixins.json"],
+  "entrypoints": {
+    "main": ["art.arcane.iris.fabric.IrisFabricBootstrap"],
+    "client": ["art.arcane.iris.fabric.IrisFabricClient"]
+  },
+  "jars": [
+    { "file": "META-INF/jars/fabric-api-base.jar" },
+    { "file": "META-INF/jars/fabric-registry-sync-v0.jar" },
+    { "file": "META-INF/jars/fabric-resource-loader-v1.jar" },
+    { "file": "META-INF/jars/fabric-lifecycle-events-v1.jar" },
+    { "file": "META-INF/jars/fabric-networking-api-v1.jar" },
+    { "file": "META-INF/jars/fabric-command-api-v2.jar" },
+    { "file": "META-INF/jars/fabric-events-interaction-v0.jar" },
+    { "file": "META-INF/jars/fabric-rendering-v1.jar" },
+    { "file": "META-INF/jars/fabric-transitive-access-wideners-v1.jar" },
+    { "file": "META-INF/jars/fabric-key-mapping-api-v1.jar" }
+  ],
+  "depends": {
+    "fabricloader": ">=0.19.3",
+    "minecraft": "~${minecraftVersion}",
+    "java": ">=25"
+  }
+}

adapters/fabric/src/main/resources/irisworldgen.accesswidener

@@ -0,0 +1,6 @@
+accessWidener v2 official
+accessible field net/minecraft/server/MinecraftServer levels Ljava/util/Map;
+accessible field net/minecraft/server/MinecraftServer executor Ljava/util/concurrent/Executor;
+accessible field net/minecraft/server/MinecraftServer storageSource Lnet/minecraft/world/level/storage/LevelStorageSource$LevelStorageAccess;
+accessible field net/minecraft/server/packs/repository/PackRepository sources Ljava/util/Set;
+mutable field net/minecraft/server/packs/repository/PackRepository sources Ljava/util/Set;

adapters/fabric/src/main/resources/irisworldgen.mixins.json

@@ -0,0 +1,13 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "art.arcane.iris.fabric.mixin",
+  "compatibilityLevel": "JAVA_25",
+  "mixins": [
+    "LivingEntityMixin",
+    "ServerPacksSourceMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}

adapters/forge/build.gradle

@@ -0,0 +1,245 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+import org.gradle.api.tasks.compile.JavaCompile
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+
+plugins {
+    id 'java'
+    id 'net.minecraftforge.gradle' version '7.0.27'
+    alias(libs.plugins.shadow)
+}
+
+Properties rootProperties = new Properties()
+file('../../gradle.properties').withInputStream { InputStream stream -> rootProperties.load(stream) }
+String irisVersion = providers.gradleProperty('irisVersion').getOrElse(rootProperties.getProperty('irisVersion', '4.0.0-26.2'))
+String minecraftVersion = providers.gradleProperty('minecraftVersion').getOrElse(rootProperties.getProperty('minecraftVersion', '26.2'))
+String forgeVersion = providers.gradleProperty('forgeVersion').getOrElse(rootProperties.getProperty('forgeVersion', '26.2-65.0.0'))
+String volmLibCoordinate = providers.gradleProperty('volmLibCoordinate').getOrElse(rootProperties.getProperty('volmLibCoordinate', 'com.github.VolmitSoftware:VolmLib:cdf7e8bb880199734dacd386a6616bda799fcde1'))
+Closure<String> loaderDisplayVersion = { String loaderVersion ->
+    String coordinatePrefix = "${minecraftVersion}-"
+    if (loaderVersion.startsWith(coordinatePrefix)) {
+        return loaderVersion.substring(coordinatePrefix.length())
+    }
+
+    return loaderVersion
+}
+Closure<String> irisArtifactName = { String platform, String targetVersion ->
+    return "Iris v${project.version} [${platform}] ${targetVersion}.jar"
+}
+
+group = 'art.arcane'
+version = irisVersion
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(25)
+    }
+}
+
+sourceSets {
+    main {
+        java {
+            srcDir '../modded-common/src/main/java'
+            srcDir '../client-common/src/main/java'
+        }
+        resources {
+            srcDir '../modded-common/src/main/resources'
+        }
+    }
+}
+
+repositories {
+    minecraft.mavenizer(it)
+    maven fg.forgeMaven
+    maven fg.minecraftLibsMaven
+    mavenCentral()
+    maven { url = uri('https://repo.codemc.org/repository/maven-public/') }
+    maven { url = uri('https://jitpack.io') }
+    maven { url = uri('https://hub.spigotmc.org/nexus/content/repositories/snapshots/') }
+}
+
+configurations {
+    bundle {
+        canBeConsumed = false
+        canBeResolved = true
+    }
+    devBundle {
+        canBeConsumed = false
+        canBeResolved = true
+    }
+    runBundle {
+        canBeConsumed = false
+        canBeResolved = true
+    }
+    commonsLangRaw {
+        canBeConsumed = false
+        canBeResolved = true
+        transitive = false
+    }
+}
+
+configurations.named('bundle').configure {
+    exclude(group: 'com.google.code.gson')
+    exclude(group: 'com.google.guava')
+    exclude(group: 'commons-io')
+    exclude(group: 'org.apache.commons', module: 'commons-lang3')
+    exclude(group: 'it.unimi.dsi', module: 'fastutil')
+    exclude(group: 'org.slf4j')
+    exclude(group: 'org.apache.logging.log4j')
+    exclude(group: 'de.crazydev22.slimjar.helper')
+    exclude(group: 'de.crazydev22.slimjar')
+    exclude(group: 'io.github.slimjar')
+}
+
+configurations.named('runBundle').configure {
+    exclude(group: 'de.crazydev22.slimjar.helper')
+    exclude(group: 'de.crazydev22.slimjar')
+    exclude(group: 'io.github.slimjar')
+}
+
+configurations.compileClasspath.extendsFrom(configurations.devBundle)
+configurations.runtimeClasspath.extendsFrom(configurations.runBundle)
+
+['compileClasspath', 'runtimeClasspath'].each { String name ->
+    configurations.named(name).configure {
+        resolutionStrategy.capabilitiesResolution.withCapability('org.lz4:lz4-java') {
+            selectHighestVersion()
+        }
+    }
+}
+
+dependencies {
+    implementation minecraft.dependency("net.minecraftforge:forge:${forgeVersion}")
+    compileOnly('org.slf4j:slf4j-api:2.0.17')
+    compileOnly(libs.spigot) {
+        transitive = false
+    }
+
+    List<Object> shared = [
+        "art.arcane:core:${irisVersion}".toString(),
+        "art.arcane:spi:${irisVersion}".toString(),
+        volmLibCoordinate,
+        libs.paralithic,
+        libs.lru,
+        libs.kotlin.stdlib,
+        libs.kotlin.coroutines,
+        libs.commons.math3,
+        libs.caffeine,
+        libs.lz4,
+        libs.zip,
+        libs.sentry,
+        libs.oshi,
+        libs.byteBuddy.core,
+        libs.byteBuddy.agent
+    ]
+    shared.each { Object notation ->
+        add('bundle', notation)
+        add('devBundle', notation)
+        add('runBundle', notation)
+    }
+    add('bundle', libs.commons.lang)
+    add('devBundle', libs.commons.lang)
+    add('commonsLangRaw', libs.commons.lang)
+}
+
+TaskProvider<Jar> sanitizedCommonsLang = tasks.register('sanitizedCommonsLang', Jar) {
+    archiveBaseName.set('commons-lang-sanitized')
+    destinationDirectory.set(layout.buildDirectory.dir('sanitized'))
+    from({ zipTree(configurations.named('commonsLangRaw').get().singleFile) })
+    exclude('org/apache/commons/lang/enum/**')
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}
+
+dependencies {
+    add('runBundle', files(sanitizedCommonsLang))
+}
+
+minecraft {
+    accessTransformer.from(file('src/main/resources/META-INF/accesstransformer.cfg'))
+    runs {
+        register('server') {
+            workingDir = layout.projectDirectory.dir('run')
+            String parity = providers.gradleProperty('irisParity').getOrNull()
+            if (parity != null) {
+                systemProperty('iris.parity', parity)
+            }
+            String parityGolden = providers.gradleProperty('irisParityGolden').getOrNull()
+            if (parityGolden != null) {
+                systemProperty('iris.parity.golden', parityGolden)
+            }
+            String parityDeep = providers.gradleProperty('irisParityDeep').getOrNull()
+            if (parityDeep != null) {
+                systemProperty('iris.parity.deep', parityDeep)
+            }
+            String worldCheck = providers.gradleProperty('irisWorldCheck').getOrNull()
+            if (worldCheck != null) {
+                systemProperty('iris.worldcheck', worldCheck)
+            }
+            jvmArgs('-Xmx8G')
+            args('--nogui')
+        }
+    }
+}
+
+tasks.named('compileJava', JavaCompile).configure {
+    options.encoding = 'UTF-8'
+    options.release.set(25)
+}
+
+processResources {
+    inputs.property('version', project.version)
+    inputs.property('minecraftVersion', minecraftVersion)
+    filesMatching('META-INF/mods.toml') {
+        expand('version': project.version, 'minecraftVersion': minecraftVersion)
+    }
+}
+
+tasks.named('shadowJar', ShadowJar).configure {
+    doFirst {
+        delete(layout.buildDirectory.file("libs/Iris-${project.version}+mc${minecraftVersion}-forge.jar"))
+    }
+    archiveFileName.set(irisArtifactName('Forge', "${minecraftVersion}+${loaderDisplayVersion(forgeVersion)}"))
+    configurations = [project.configurations.named('bundle').get()]
+    from(sourceSets.main.output)
+    mergeServiceFiles()
+    exclude('META-INF/maven/**')
+    exclude('META-INF/proguard/**')
+    exclude('META-INF/*.SF')
+    exclude('META-INF/*.DSA')
+    exclude('META-INF/*.RSA')
+    exclude('org/apache/commons/lang/enum/**')
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    relocate('org.objectweb.asm', 'art.arcane.iris.shadow.asm')
+    relocate('io.sentry', 'art.arcane.iris.shadow.sentry')
+    relocate('com.sun.jna', 'art.arcane.iris.shadow.jna')
+    relocate('oshi', 'art.arcane.iris.shadow.oshi')
+    relocate('net.jpountz', 'art.arcane.iris.shadow.jpountz')
+    exclude('oshi.properties')
+    exclude('org/jspecify/**')
+    exclude('com/google/errorprone/**')
+    exclude('com/google/j2objc/**')
+    exclude('org/checkerframework/**')
+    exclude('org/jetbrains/annotations/**')
+    exclude('org/intellij/lang/**')
+}
+
+tasks.named('assemble').configure {
+    dependsOn(tasks.named('shadowJar'))
+}

adapters/forge/gradle.properties

@@ -0,0 +1,6 @@
+org.gradle.daemon=true
+org.gradle.parallel=true
+org.gradle.jvmargs=-Xmx3072m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+org.gradle.caching=true
+org.gradle.configuration-cache=false
+net.minecraftforge.gradle.merge-source-sets=true

adapters/forge/settings.gradle

@@ -0,0 +1,95 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import java.io.File
+
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven {
+            name = 'MinecraftForge'
+            url = uri('https://maven.minecraftforge.net/')
+        }
+        mavenCentral()
+    }
+}
+
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
+}
+
+rootProject.name = 'iris-forge'
+
+dependencyResolutionManagement {
+    versionCatalogs {
+        libs {
+            from(files('../../gradle/libs.versions.toml'))
+        }
+    }
+}
+
+boolean hasVolmLibSettings(File directory) {
+    new File(directory, 'settings.gradle.kts').exists() || new File(directory, 'settings.gradle').exists()
+}
+
+File resolveLocalVolmLibDirectory() {
+    String configuredPath = providers.gradleProperty('localVolmLibDirectory')
+        .orElse(providers.environmentVariable('VOLMLIB_DIR'))
+        .orNull
+    if (configuredPath != null && !configuredPath.isBlank()) {
+        File configuredDirectory = file(configuredPath)
+        if (hasVolmLibSettings(configuredDirectory)) {
+            return configuredDirectory
+        }
+    }
+
+    File currentDirectory = settingsDir
+    while (currentDirectory != null) {
+        File candidate = new File(currentDirectory, 'VolmLib')
+        if (hasVolmLibSettings(candidate)) {
+            return candidate
+        }
+
+        currentDirectory = currentDirectory.parentFile
+    }
+
+    null
+}
+
+boolean useLocalVolmLib = providers.gradleProperty('useLocalVolmLib')
+    .orElse('true')
+    .map { String value -> value.equalsIgnoreCase('true') }
+    .get()
+File localVolmLibDirectory = resolveLocalVolmLibDirectory()
+
+if (useLocalVolmLib && localVolmLibDirectory != null) {
+    includeBuild(localVolmLibDirectory) {
+        dependencySubstitution {
+            substitute(module('com.github.VolmitSoftware:VolmLib')).using(project(':shared'))
+            substitute(module('com.github.VolmitSoftware.VolmLib:shared')).using(project(':shared'))
+            substitute(module('com.github.VolmitSoftware.VolmLib:volmlib-shared')).using(project(':shared'))
+        }
+    }
+}
+
+includeBuild('../..') {
+    dependencySubstitution {
+        substitute(module('art.arcane:core')).using(project(':core'))
+        substitute(module('art.arcane:spi')).using(project(':spi'))
+    }
+}

adapters/forge/src/main/java/art/arcane/iris/forge/ForgeClientProtocol.java

@@ -0,0 +1,31 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.forge;
+
+import art.arcane.iris.client.IrisClient;
+import net.minecraftforge.event.network.CustomPayloadEvent;
+
+public final class ForgeClientProtocol {
+    private ForgeClientProtocol() {
+    }
+
+    public static void handleInbound(CustomPayloadEvent.Context context, byte[] data) {
+        context.enqueueWork(() -> IrisClient.onInbound(data));
+    }
+}

adapters/forge/src/main/java/art/arcane/iris/forge/ForgeModdedLoader.java

@@ -0,0 +1,71 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.forge;
+
+import art.arcane.iris.modded.ModdedLoader;
+import net.minecraft.server.MinecraftServer;
+import net.minecraftforge.fml.ModList;
+import net.minecraftforge.fml.loading.FMLEnvironment;
+import net.minecraftforge.fml.loading.FMLLoader;
+import net.minecraftforge.fml.loading.FMLPaths;
+import net.minecraftforge.forgespi.language.IModFileInfo;
+import net.minecraftforge.server.ServerLifecycleHooks;
+
+import java.io.File;
+import java.nio.file.Path;
+
+public final class ForgeModdedLoader implements ModdedLoader {
+    @Override
+    public String platformName() {
+        return "forge";
+    }
+
+    @Override
+    public String minecraftVersion() {
+        return FMLLoader.versionInfo().mcVersion();
+    }
+
+    @Override
+    public String modVersion() {
+        return ModList.getModContainerById("irisworldgen")
+                .map((net.minecraftforge.fml.ModContainer container) -> container.getModInfo().getVersion().toString())
+                .orElse("unknown");
+    }
+
+    @Override
+    public MinecraftServer currentServer() {
+        return ServerLifecycleHooks.getCurrentServer();
+    }
+
+    @Override
+    public boolean clientEnvironment() {
+        return FMLEnvironment.dist.isClient();
+    }
+
+    @Override
+    public Path configDir() {
+        return FMLPaths.CONFIGDIR.get();
+    }
+
+    @Override
+    public File modJar() {
+        IModFileInfo info = ModList.getModFileById("irisworldgen");
+        return info == null ? null : info.getFile().getFilePath().toFile();
+    }
+}

adapters/forge/src/main/java/art/arcane/iris/forge/ForgeProtocolNetworking.java

@@ -0,0 +1,86 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.forge;
+
+import art.arcane.iris.modded.ModdedIrisPayload;
+import art.arcane.iris.modded.ModdedProtocolChannel;
+import art.arcane.iris.modded.ModdedProtocolHandler;
+import art.arcane.iris.spi.protocol.IrisProtocol;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.resources.Identifier;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraftforge.event.network.CustomPayloadEvent;
+import net.minecraftforge.network.Channel;
+import net.minecraftforge.network.ChannelBuilder;
+import net.minecraftforge.network.NetworkProtocol;
+import net.minecraftforge.network.PacketDistributor;
+
+public final class ForgeProtocolNetworking {
+    private static volatile Channel<CustomPacketPayload> channel;
+
+    private ForgeProtocolNetworking() {
+    }
+
+    public static void register() {
+        Channel<CustomPacketPayload> boundChannel = ChannelBuilder.named(Identifier.parse(IrisProtocol.CHANNEL))
+                .optional()
+                .payloadChannel()
+                .protocol(NetworkProtocol.PLAY)
+                .bidirectional()
+                .add(ModdedIrisPayload.TYPE, ModdedIrisPayload.STREAM_CODEC, ForgeProtocolNetworking::onPayload)
+                .build();
+        channel = boundChannel;
+        ModdedProtocolHandler.bindChannel(new ForgeProtocolChannel(boundChannel));
+    }
+
+    public static Channel<CustomPacketPayload> channel() {
+        return channel;
+    }
+
+    private static void onPayload(ModdedIrisPayload payload, CustomPayloadEvent.Context context) {
+        context.setPacketHandled(true);
+        if (context.isClientSide()) {
+            ForgeClientProtocol.handleInbound(context, payload.data());
+            return;
+        }
+        ServerPlayer player = context.getSender();
+        if (player == null) {
+            return;
+        }
+        ModdedProtocolHandler.onInbound(player, payload.data());
+    }
+
+    private static final class ForgeProtocolChannel implements ModdedProtocolChannel {
+        private final Channel<CustomPacketPayload> channel;
+
+        private ForgeProtocolChannel(Channel<CustomPacketPayload> channel) {
+            this.channel = channel;
+        }
+
+        @Override
+        public boolean canReceive(ServerPlayer player) {
+            return true;
+        }
+
+        @Override
+        public void send(ServerPlayer player, ModdedIrisPayload payload) {
+            channel.send(payload, PacketDistributor.PLAYER.with(player));
+        }
+    }
+}

adapters/forge/src/main/java/art/arcane/iris/forge/IrisForgeBootstrap.java

@@ -0,0 +1,93 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.forge;
+
+import art.arcane.iris.modded.IrisModdedChunkGenerator;
+import art.arcane.iris.modded.ModdedDeathLoot;
+import art.arcane.iris.modded.ModdedEngineBootstrap;
+import art.arcane.iris.modded.ModdedForcedDatapack;
+import art.arcane.iris.modded.ModdedProtocolHandler;
+import art.arcane.iris.modded.command.IrisModdedCommands;
+import art.arcane.iris.modded.command.ModdedWandService;
+import com.mojang.serialization.MapCodec;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.packs.PackType;
+import net.minecraft.world.level.chunk.ChunkGenerator;
+import net.minecraftforge.event.AddPackFindersEvent;
+import net.minecraftforge.event.RegisterCommandsEvent;
+import net.minecraftforge.event.TickEvent;
+import net.minecraftforge.event.entity.living.LivingDropsEvent;
+import net.minecraftforge.event.entity.player.PlayerEvent;
+import net.minecraftforge.event.entity.player.PlayerInteractEvent;
+import net.minecraftforge.event.server.ServerStartingEvent;
+import net.minecraftforge.event.server.ServerStoppingEvent;
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
+import net.minecraftforge.fml.loading.FMLEnvironment;
+import net.minecraftforge.fml.loading.FMLLoader;
+import net.minecraftforge.registries.DeferredRegister;
+
+import java.util.function.Predicate;
+
+@Mod("irisworldgen")
+public final class IrisForgeBootstrap {
+    public IrisForgeBootstrap(FMLJavaModLoadingContext context) {
+        ModdedEngineBootstrap.bootCommon(new ForgeModdedLoader(), "Forge " + FMLLoader.versionInfo().forgeVersion(), () -> {
+            DeferredRegister<MapCodec<? extends ChunkGenerator>> chunkGenerators = DeferredRegister.create(Registries.CHUNK_GENERATOR, "irisworldgen");
+            chunkGenerators.register("iris", () -> IrisModdedChunkGenerator.CODEC);
+            chunkGenerators.register(context.getModBusGroup());
+        });
+
+        ForgeProtocolNetworking.register();
+
+        if (FMLEnvironment.dist == Dist.CLIENT) {
+            IrisForgeClient.init();
+        }
+
+        ServerStartingEvent.BUS.addListener((ServerStartingEvent event) -> ModdedEngineBootstrap.start(event.getServer()));
+        ServerStoppingEvent.BUS.addListener((ServerStoppingEvent event) -> ModdedEngineBootstrap.stop());
+        PlayerEvent.PlayerLoggedInEvent.BUS.addListener((PlayerEvent.PlayerLoggedInEvent event) -> {
+            if (event.getEntity() instanceof ServerPlayer player) {
+                ModdedProtocolHandler.onPlayerJoin(player);
+            }
+        });
+        PlayerEvent.PlayerLoggedOutEvent.BUS.addListener((PlayerEvent.PlayerLoggedOutEvent event) -> {
+            if (event.getEntity() instanceof ServerPlayer player) {
+                ModdedProtocolHandler.onPlayerDisconnect(player);
+            }
+        });
+        AddPackFindersEvent.BUS.addListener((AddPackFindersEvent event) -> {
+            if (event.getPackType() == PackType.SERVER_DATA) {
+                event.addRepositorySource(ModdedForcedDatapack.repositorySource());
+            }
+        });
+        RegisterCommandsEvent.BUS.addListener((RegisterCommandsEvent event) -> IrisModdedCommands.register(event.getDispatcher()));
+        LivingDropsEvent.BUS.addListener((LivingDropsEvent event) -> ModdedDeathLoot.handle(event.getEntity()));
+        PlayerInteractEvent.LeftClickBlock.BUS.addListener((Predicate<PlayerInteractEvent.LeftClickBlock>) (PlayerInteractEvent.LeftClickBlock event) ->
+                ModdedWandService.attackBlock(event.getEntity(), event.getLevel(), event.getHand(), event.getPos()));
+        PlayerInteractEvent.RightClickBlock.BUS.addListener((Predicate<PlayerInteractEvent.RightClickBlock>) (PlayerInteractEvent.RightClickBlock event) ->
+                ModdedWandService.useBlock(event.getEntity(), event.getLevel(), event.getHand(), event.getPos()));
+        TickEvent.ServerTickEvent.Post.BUS.addListener((TickEvent.ServerTickEvent.Post event) -> {
+            ModdedEngineBootstrap.tick(event.server());
+            ModdedWandService.serverTick(event.server());
+        });
+    }
+}

adapters/forge/src/main/java/art/arcane/iris/forge/IrisForgeClient.java

@@ -0,0 +1,58 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.forge;
+
+import art.arcane.iris.client.IrisClient;
+import art.arcane.iris.client.IrisClientHud;
+import art.arcane.iris.client.IrisClientKeybinds;
+import art.arcane.iris.modded.ModdedIrisPayload;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraftforge.client.event.AddGuiOverlayLayersEvent;
+import net.minecraftforge.client.event.ClientPlayerNetworkEvent;
+import net.minecraftforge.client.event.InputEvent;
+import net.minecraftforge.client.event.RegisterKeyMappingsEvent;
+import net.minecraftforge.network.Channel;
+import net.minecraftforge.network.PacketDistributor;
+
+public final class IrisForgeClient {
+    private IrisForgeClient() {
+    }
+
+    public static void init() {
+        IrisClient.bindSender(IrisForgeClient::sendToServer);
+        AddGuiOverlayLayersEvent.BUS.addListener((AddGuiOverlayLayersEvent event) ->
+                event.getLayeredDraw().add(IrisClient.HUD_ELEMENT_ID, (graphics, delta) -> IrisClientHud.render(graphics)));
+        RegisterKeyMappingsEvent.BUS.addListener((RegisterKeyMappingsEvent event) -> {
+            event.register(IrisClientKeybinds.TOGGLE_HUD);
+            event.register(IrisClientKeybinds.OPEN_MAP);
+            event.register(IrisClientKeybinds.TOGGLE_WHAT);
+        });
+        ClientPlayerNetworkEvent.LoggingIn.BUS.addListener((ClientPlayerNetworkEvent.LoggingIn event) -> IrisClient.onWorldJoin());
+        ClientPlayerNetworkEvent.LoggingOut.BUS.addListener((ClientPlayerNetworkEvent.LoggingOut event) -> IrisClient.onDisconnect());
+        InputEvent.Key.BUS.addListener((InputEvent.Key event) -> IrisClientKeybinds.pollToggle());
+    }
+
+    private static void sendToServer(byte[] frame) {
+        Channel<CustomPacketPayload> channel = ForgeProtocolNetworking.channel();
+        if (channel == null) {
+            return;
+        }
+        channel.send(new ModdedIrisPayload(frame), PacketDistributor.SERVER.noArg());
+    }
+}

adapters/forge/src/main/resources/META-INF/accesstransformer.cfg

@@ -0,0 +1,3 @@
+public net.minecraft.server.MinecraftServer levels
+public net.minecraft.server.MinecraftServer executor
+public net.minecraft.server.MinecraftServer storageSource

adapters/forge/src/main/resources/META-INF/mods.toml

@@ -0,0 +1,24 @@
+modLoader = "javafml"
+loaderVersion = "[65,)"
+license = "GPL-3.0"
+
+[[mods]]
+modId = "irisworldgen"
+version = "${version}"
+displayName = "Iris"
+description = "Iris World Generation Engine (Forge adapter - native chunk generator, explicit Iris world datapack workflow, engine lifecycle)"
+authors = "Arcane Arts (Volmit Software)"
+
+[[dependencies.irisworldgen]]
+modId = "forge"
+mandatory = true
+versionRange = "[65,)"
+ordering = "NONE"
+side = "BOTH"
+
+[[dependencies.irisworldgen]]
+modId = "minecraft"
+mandatory = true
+versionRange = "[${minecraftVersion}]"
+ordering = "NONE"
+side = "BOTH"

adapters/forge/src/main/resources/pack.mcmeta

@@ -0,0 +1,10 @@
+{
+  "pack": {
+    "description": "Iris World Generation Engine resources",
+    "max_format": 101,
+    "min_format": [
+      101,
+      1
+    ]
+  }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/InitialSpawnQueue.java

@@ -0,0 +1,159 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import java.util.ArrayDeque;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.function.LongSupplier;
+
+final class InitialSpawnQueue {
+    private static final long DEFAULT_MAX_AGE_NANOS = TimeUnit.MINUTES.toNanos(5);
+
+    private final int capacity;
+    private final long maxAgeNanos;
+    private final LongSupplier nanoTime;
+    private final ArrayDeque<Long> queue;
+    private final Map<Long, Long> pending;
+    private final Set<Long> queued;
+    private boolean closed;
+
+    InitialSpawnQueue(int capacity) {
+        this(capacity, DEFAULT_MAX_AGE_NANOS, System::nanoTime);
+    }
+
+    InitialSpawnQueue(int capacity, long maxAgeNanos, LongSupplier nanoTime) {
+        if (capacity < 1) {
+            throw new IllegalArgumentException("capacity must be positive");
+        }
+        if (maxAgeNanos < 1L) {
+            throw new IllegalArgumentException("maxAgeNanos must be positive");
+        }
+        this.capacity = capacity;
+        this.maxAgeNanos = maxAgeNanos;
+        this.nanoTime = nanoTime;
+        this.queue = new ArrayDeque<>(Math.min(capacity, 256));
+        this.pending = new HashMap<>();
+        this.queued = new HashSet<>();
+    }
+
+    synchronized boolean offer(long key) {
+        if (closed || pending.containsKey(key)) {
+            return false;
+        }
+        if (pending.size() >= capacity) {
+            expire(nanoTime.getAsLong());
+        }
+        if (pending.size() >= capacity) {
+            return false;
+        }
+        pending.put(key, nanoTime.getAsLong());
+        queued.add(key);
+        queue.addLast(key);
+        return true;
+    }
+
+    synchronized int batchSize(int limit) {
+        if (closed || limit <= 0) {
+            return 0;
+        }
+        return Math.min(limit, queue.size());
+    }
+
+    synchronized Long poll() {
+        long now = nanoTime.getAsLong();
+        Long key;
+        while ((key = queue.pollFirst()) != null) {
+            queued.remove(key);
+            Long offeredAt = pending.get(key);
+            if (offeredAt == null) {
+                continue;
+            }
+            if (expired(offeredAt, now)) {
+                pending.remove(key);
+                continue;
+            }
+            return key;
+        }
+        return null;
+    }
+
+    synchronized void retry(long key) {
+        Long offeredAt = pending.get(key);
+        if (closed || offeredAt == null || expired(offeredAt, nanoTime.getAsLong())) {
+            pending.remove(key);
+            queued.remove(key);
+            return;
+        }
+        if (!queued.add(key)) {
+            return;
+        }
+        queue.addLast(key);
+    }
+
+    synchronized void complete(long key) {
+        pending.remove(key);
+        if (queued.remove(key)) {
+            queue.removeFirstOccurrence(key);
+        }
+    }
+
+    synchronized boolean isEmpty() {
+        return queue.isEmpty();
+    }
+
+    synchronized int size() {
+        return pending.size();
+    }
+
+    synchronized void clear() {
+        queue.clear();
+        pending.clear();
+        queued.clear();
+    }
+
+    synchronized void close() {
+        closed = true;
+        clear();
+    }
+
+    private void expire(long now) {
+        Set<Long> expired = new HashSet<>();
+        for (Map.Entry<Long, Long> entry : pending.entrySet()) {
+            if (expired(entry.getValue(), now)) {
+                expired.add(entry.getKey());
+            }
+        }
+        if (expired.isEmpty()) {
+            return;
+        }
+        for (Long key : expired) {
+            pending.remove(key);
+            queued.remove(key);
+        }
+        queue.removeIf(expired::contains);
+    }
+
+    private boolean expired(long offeredAt, long now) {
+        return now - offeredAt >= maxAgeNanos;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/IrisModdedChunkGenerator.java

@@ -0,0 +1,584 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.framework.GenerationSessionException;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisBiomeCustom;
+import art.arcane.iris.spi.IrisPlatforms;
+import art.arcane.iris.spi.PlatformBiome;
+import art.arcane.iris.spi.PlatformBlockState;
+import art.arcane.iris.util.project.hunk.Hunk;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Holder;
+import net.minecraft.core.QuartPos;
+import net.minecraft.core.Registry;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.WorldGenRegion;
+import net.minecraft.util.random.WeightedList;
+import net.minecraft.world.entity.MobCategory;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.LevelHeightAccessor;
+import net.minecraft.world.level.NoiseColumn;
+import net.minecraft.world.level.StructureManager;
+import net.minecraft.world.level.WorldGenLevel;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.BiomeManager;
+import net.minecraft.world.level.biome.BiomeResolver;
+import net.minecraft.world.level.biome.BiomeSource;
+import net.minecraft.world.level.biome.Climate;
+import net.minecraft.world.level.biome.MobSpawnSettings;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkGenerator;
+import net.minecraft.world.level.chunk.ChunkGeneratorStructureState;
+import net.minecraft.world.level.chunk.LevelChunkSection;
+import net.minecraft.world.level.levelgen.Heightmap;
+import net.minecraft.world.level.levelgen.RandomState;
+import net.minecraft.world.level.levelgen.blending.Blender;
+import net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplateManager;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public final class IrisModdedChunkGenerator extends ChunkGenerator {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+    public static final MapCodec<IrisModdedChunkGenerator> CODEC = RecordCodecBuilder.mapCodec((RecordCodecBuilder.Instance<IrisModdedChunkGenerator> instance) -> instance.group(
+            BiomeSource.CODEC.fieldOf("biome_source").forGetter((IrisModdedChunkGenerator generator) -> generator.biomeSource),
+            Codec.STRING.fieldOf("dimension").forGetter((IrisModdedChunkGenerator generator) -> generator.dimensionKey)
+    ).apply(instance, IrisModdedChunkGenerator::new));
+
+    private static final AtomicInteger GEN_THREAD_SEQ = new AtomicInteger();
+    private static final boolean PARALLEL_CHUNK_SYSTEM = detectParallelChunkSystem();
+    private static volatile ExecutorService genPool = createGenPool();
+
+    public static void startGenPool() {
+        ExecutorService pool = genPool;
+        if (pool == null || pool.isShutdown()) {
+            genPool = createGenPool();
+        }
+    }
+
+    public static void shutdownGenPool() {
+        ExecutorService pool = genPool;
+        if (pool != null) {
+            pool.shutdownNow();
+        }
+    }
+
+    private static boolean detectParallelChunkSystem() {
+        String[] markers = {
+                "com.ishland.c2me.base.ModProperties",
+                "com.ishland.c2me.base.common.config.C2MEConfig",
+                "com.ishland.c2me.opts.chunkio.ModProperties",
+                "ca.spottedleaf.moonrise.common.util.MoonriseCommon"
+        };
+        for (String marker : markers) {
+            try {
+                Class.forName(marker, false, IrisModdedChunkGenerator.class.getClassLoader());
+                return true;
+            } catch (Throwable ignored) {
+            }
+        }
+        return false;
+    }
+
+    private static ExecutorService createGenPool() {
+        int threads = Math.max(2, Runtime.getRuntime().availableProcessors());
+        ThreadPoolExecutor pool = new ThreadPoolExecutor(
+                threads, threads, 30L, TimeUnit.SECONDS,
+                new LinkedBlockingQueue<>(),
+                runnable -> {
+                    Thread thread = new Thread(runnable, "Iris ModGen-" + GEN_THREAD_SEQ.incrementAndGet());
+                    thread.setDaemon(true);
+                    return thread;
+                });
+        pool.allowCoreThreadTimeOut(true);
+        return pool;
+    }
+
+    private final String dimensionKey;
+    private final String defaultPack;
+    private final String defaultDimensionKey;
+    private final ConcurrentHashMap<String, Holder<Biome>> biomeHolders = new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<Biome, Holder<Biome>> vanillaSpawnBiomes = new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<SpawnTableKey, WeightedList<MobSpawnSettings.SpawnerData>> mergedSpawnTables = new ConcurrentHashMap<>();
+    private final Set<String> missingBiomeWarnings = ConcurrentHashMap.newKeySet();
+    private final AtomicBoolean announced = new AtomicBoolean(false);
+    private volatile boolean vanillaSpawnBiomesInitialized;
+    private volatile Engine engine;
+    private volatile String activePack;
+    private volatile String activeDimensionKey;
+    private volatile long seedOverride = Long.MIN_VALUE;
+    private volatile long lastChunkGenAt = 0L;
+
+    public IrisModdedChunkGenerator(BiomeSource biomeSource, String dimensionKey) {
+        super(biomeSource);
+        this.dimensionKey = dimensionKey;
+        int colon = dimensionKey.indexOf(':');
+        this.defaultPack = colon >= 0 ? dimensionKey.substring(0, colon) : dimensionKey;
+        this.defaultDimensionKey = colon >= 0 ? dimensionKey.substring(colon + 1) : dimensionKey;
+        this.activePack = defaultPack;
+        this.activeDimensionKey = defaultDimensionKey;
+    }
+
+    public synchronized void repoint(String pack, String packDimensionKey, long seed) {
+        ServerLevel level = boundLevel();
+        if (level != null) {
+            ModdedWorldEngines.evict(level);
+        }
+        this.activePack = pack;
+        this.activeDimensionKey = packDimensionKey;
+        this.seedOverride = seed;
+        this.engine = null;
+        this.announced.set(false);
+        this.biomeHolders.clear();
+        this.missingBiomeWarnings.clear();
+        resetVanillaSpawnBiomes();
+    }
+
+    public synchronized void unbindEngine() {
+        ServerLevel level = boundLevel();
+        if (level != null) {
+            ModdedWorldEngines.evict(level);
+        }
+        this.engine = null;
+        this.announced.set(false);
+        this.biomeHolders.clear();
+        this.missingBiomeWarnings.clear();
+        resetVanillaSpawnBiomes();
+    }
+
+    public synchronized void resetToDefault() {
+        repoint(defaultPack, defaultDimensionKey, Long.MIN_VALUE);
+    }
+
+    public String activePack() {
+        return activePack;
+    }
+
+    public String activeDimensionKey() {
+        return activeDimensionKey;
+    }
+
+    @Override
+    protected MapCodec<? extends ChunkGenerator> codec() {
+        return CODEC;
+    }
+
+    private ServerLevel boundLevel() {
+        MinecraftServer server = ModdedEngineBootstrap.currentServer();
+        if (server == null) {
+            return null;
+        }
+        for (ServerLevel level : server.getAllLevels()) {
+            if (level.getChunkSource().getGenerator() == this) {
+                return level;
+            }
+        }
+        return null;
+    }
+
+    private Engine engine() {
+        Engine cached = engine;
+        if (cached != null) {
+            return cached;
+        }
+        synchronized (this) {
+            if (engine != null) {
+                return engine;
+            }
+            ServerLevel level = boundLevel();
+            if (level == null) {
+                throw new IllegalStateException("Iris generator '" + dimensionKey + "' has no bound ServerLevel yet");
+            }
+            Engine created = ModdedWorldEngines.get(level, activePack, activeDimensionKey, seedOverride);
+            engine = created;
+            return created;
+        }
+    }
+
+    private Engine engineOrNull() {
+        Engine cached = engine;
+        if (cached != null) {
+            return cached;
+        }
+        try {
+            return engine();
+        } catch (Throwable ignored) {
+            return null;
+        }
+    }
+
+    public String dimensionKey() {
+        return dimensionKey;
+    }
+
+    public Engine engineIfBound() {
+        return engine;
+    }
+
+    public Engine commandEngine() {
+        return engine();
+    }
+
+    public long lastChunkGenAt() {
+        return lastChunkGenAt;
+    }
+
+    public void onHotload() {
+        biomeHolders.clear();
+        missingBiomeWarnings.clear();
+        resetVanillaSpawnBiomes();
+    }
+
+    @Override
+    public WeightedList<MobSpawnSettings.SpawnerData> getMobsAt(
+            Holder<Biome> biome, StructureManager structureManager, MobCategory category, BlockPos pos) {
+        WeightedList<MobSpawnSettings.SpawnerData> explicitSpawns = biome.value().getMobSettings().getMobs(category);
+        WeightedList<MobSpawnSettings.SpawnerData> resolvedSpawns = super.getMobsAt(
+                biome, structureManager, category, pos);
+        if (resolvedSpawns != explicitSpawns) {
+            return resolvedSpawns;
+        }
+
+        Registry<Biome> registry = structureManager.registryAccess().lookupOrThrow(Registries.BIOME);
+        initializeVanillaSpawnBiomes(registry);
+        Holder<Biome> vanillaSpawnBiome = vanillaSpawnBiomes.get(biome.value());
+        if (vanillaSpawnBiome == null) {
+            return explicitSpawns;
+        }
+
+        WeightedList<MobSpawnSettings.SpawnerData> vanillaSpawns = vanillaSpawnBiome.value().getMobSettings().getMobs(category);
+        if (explicitSpawns.isEmpty()) {
+            return vanillaSpawns;
+        }
+        if (vanillaSpawns.isEmpty()) {
+            return explicitSpawns;
+        }
+
+        SpawnTableKey key = new SpawnTableKey(biome.value(), category);
+        return mergedSpawnTables.computeIfAbsent(key, ignored -> NativeSpawnTableMerger.merge(vanillaSpawns, explicitSpawns));
+    }
+
+    private synchronized void initializeVanillaSpawnBiomes(Registry<Biome> registry) {
+        if (vanillaSpawnBiomesInitialized) {
+            return;
+        }
+        Engine current = engineOrNull();
+        if (current == null) {
+            return;
+        }
+
+        String namespace = current.getDimension().getLoadKey().toLowerCase(Locale.ROOT);
+        for (IrisBiome irisBiome : current.getDimension().getAllBiomes(current)) {
+            if (irisBiome == null || !irisBiome.isCustom()) {
+                continue;
+            }
+            Holder<Biome> vanillaHolder = resolveBiomeHolder(registry, irisBiome.getVanillaDerivativeKey());
+            if (vanillaHolder == null) {
+                continue;
+            }
+            for (IrisBiomeCustom customBiome : irisBiome.getCustomDerivitives()) {
+                Holder<Biome> customHolder = resolveBiomeHolder(registry, namespace + ":" + customBiome.getId());
+                if (customHolder != null) {
+                    vanillaSpawnBiomes.putIfAbsent(customHolder.value(), vanillaHolder);
+                }
+            }
+        }
+        vanillaSpawnBiomesInitialized = true;
+    }
+
+    private Holder<Biome> resolveBiomeHolder(Registry<Biome> registry, String key) {
+        if (key == null || key.isBlank()) {
+            return null;
+        }
+        Identifier identifier = Identifier.tryParse(key);
+        if (identifier == null) {
+            return null;
+        }
+        Optional<Holder.Reference<Biome>> reference = registry.get(identifier);
+        return reference.<Holder<Biome>>map((Holder.Reference<Biome> value) -> value).orElse(null);
+    }
+
+    private synchronized void resetVanillaSpawnBiomes() {
+        vanillaSpawnBiomes.clear();
+        mergedSpawnTables.clear();
+        vanillaSpawnBiomesInitialized = false;
+    }
+
+    @Override
+    public CompletableFuture<ChunkAccess> fillFromNoise(Blender blender, RandomState randomState, StructureManager structureManager, ChunkAccess chunk) {
+        Engine generationEngine = engine();
+        ChunkPos pos = chunk.getPos();
+        lastChunkGenAt = System.currentTimeMillis();
+        if (announced.compareAndSet(false, true)) {
+            LOGGER.info("Iris generating {} through IrisModdedChunkGenerator (dim={} first chunk {},{})",
+                    dimensionKey, generationEngine.getDimension().getLoadKey(), pos.x(), pos.z());
+        }
+        LOGGER.debug("Iris generating chunk {},{}", pos.x(), pos.z());
+
+        int dimMinY = generationEngine.getMinHeight();
+        int dimMaxY = generationEngine.getMaxHeight();
+        int height = dimMaxY - dimMinY;
+        PlatformBlockState air = IrisPlatforms.get().registries().air();
+        Registry<Biome> biomeRegistry = structureManager.registryAccess().lookupOrThrow(Registries.BIOME);
+
+        if (PARALLEL_CHUNK_SYSTEM) {
+            return CompletableFuture.completedFuture(
+                    generateTerrain(chunk, generationEngine, pos, dimMinY, height, air, biomeRegistry, randomState));
+        }
+        return CompletableFuture.supplyAsync(
+                () -> generateTerrain(chunk, generationEngine, pos, dimMinY, height, air, biomeRegistry, randomState),
+                genPool);
+    }
+
+    private ChunkAccess generateTerrain(ChunkAccess chunk, Engine generationEngine, ChunkPos pos,
+                                        int dimMinY, int height, PlatformBlockState air,
+                                        Registry<Biome> biomeRegistry, RandomState randomState) {
+        ModdedBlockBuffer blocks = new ModdedBlockBuffer(height, air);
+        Hunk<PlatformBiome> biomes = Hunk.newArrayHunk(16, height, 16);
+        try {
+            generationEngine.generate(pos.getMinBlockX(), pos.getMinBlockZ(), blocks, biomes, false);
+        } catch (GenerationSessionException e) {
+            if (e.isExpectedTeardown()) {
+                LOGGER.debug("Iris chunk {},{} skipped: engine sealed for hotload/teardown", pos.x(), pos.z());
+                return chunk;
+            }
+            LOGGER.error("Iris failed to generate chunk {},{}", pos.x(), pos.z(), e);
+            throw new IllegalStateException("Iris generation failed for chunk " + pos.x() + "," + pos.z(), e);
+        } catch (Throwable e) {
+            LOGGER.error("Iris failed to generate chunk {},{}", pos.x(), pos.z(), e);
+            throw new IllegalStateException("Iris generation failed for chunk " + pos.x() + "," + pos.z(), e);
+        }
+
+        writeBlocks(chunk, blocks, dimMinY, height);
+        Heightmap.primeHeightmaps(chunk, EnumSet.of(Heightmap.Types.WORLD_SURFACE_WG, Heightmap.Types.OCEAN_FLOOR_WG));
+        chunk.fillBiomesFromNoise(new HunkBiomeResolver(this, biomes, biomeRegistry, pos, dimMinY, height), randomState.sampler());
+        ModdedWorldManager.enqueueGenerated(generationEngine, pos.x(), pos.z());
+        return chunk;
+    }
+
+    private Holder<Biome> fallbackBiome(Registry<Biome> registry) {
+        Holder<Biome> existing = biomeHolders.get("minecraft:plains");
+        if (existing != null) {
+            return existing;
+        }
+        Holder<Biome> resolved = registry.get(Identifier.fromNamespaceAndPath("minecraft", "plains"))
+                .<Holder<Biome>>map((Holder.Reference<Biome> reference) -> reference)
+                .orElseThrow(() -> new IllegalStateException("minecraft:plains missing from biome registry"));
+        Holder<Biome> raced = biomeHolders.putIfAbsent("minecraft:plains", resolved);
+        return raced != null ? raced : resolved;
+    }
+
+    private Holder<Biome> holderFor(Registry<Biome> registry, PlatformBiome biome) {
+        if (biome == null) {
+            return fallbackBiome(registry);
+        }
+        String key = biome.key();
+        Holder<Biome> existing = biomeHolders.get(key);
+        if (existing != null) {
+            return existing;
+        }
+        Identifier identifier = Identifier.tryParse(key);
+        Optional<Holder.Reference<Biome>> reference = identifier == null ? Optional.empty() : registry.get(identifier);
+        Holder<Biome> resolved = reference.<Holder<Biome>>map((Holder.Reference<Biome> value) -> value).orElseGet(() -> {
+            if (missingBiomeWarnings.size() < 256 && missingBiomeWarnings.add(key)) {
+                LOGGER.warn("Iris biome '{}' (pack {}) is not in the biome registry; writing minecraft:plains. Restart so the forced datapack registers the pack biomes.", key, activePack);
+            }
+            return fallbackBiome(registry);
+        });
+        Holder<Biome> raced = biomeHolders.putIfAbsent(key, resolved);
+        return raced != null ? raced : resolved;
+    }
+
+    public BiomeResolver regenBiomeResolver(Registry<Biome> registry, Hunk<PlatformBiome> biomes, ChunkPos pos) {
+        Engine current = engine();
+        int dimMinY = current.getMinHeight();
+        int height = current.getMaxHeight() - dimMinY;
+        return new HunkBiomeResolver(this, biomes, registry, pos, dimMinY, height);
+    }
+
+    private void writeBlocks(ChunkAccess chunk, ModdedBlockBuffer blocks, int dimMinY, int height) {
+        int chunkMinY = chunk.getMinY();
+        int chunkMaxY = chunkMinY + chunk.getHeight();
+        int from = Math.max(dimMinY, chunkMinY);
+        int to = Math.min(dimMinY + height, chunkMaxY);
+
+        for (int y = from; y < to; ) {
+            int sectionIndex = chunk.getSectionIndex(y);
+            LevelChunkSection section = chunk.getSection(sectionIndex);
+            int sectionMinY = chunk.getSectionYFromSectionIndex(sectionIndex) << 4;
+            int sectionEnd = Math.min(sectionMinY + 16, to);
+            section.acquire();
+            try {
+                for (int blockY = y; blockY < sectionEnd; blockY++) {
+                    int bufferY = blockY - dimMinY;
+                    int localY = blockY & 15;
+                    for (int z = 0; z < 16; z++) {
+                        for (int x = 0; x < 16; x++) {
+                            if (blocks.isAir(x, bufferY, z)) {
+                                continue;
+                            }
+                            PlatformBlockState state = blocks.getRaw(x, bufferY, z);
+                            section.setBlockState(x, localY, z, (BlockState) state.nativeHandle(), false);
+                        }
+                    }
+                }
+            } finally {
+                section.release();
+            }
+            y = sectionEnd;
+        }
+    }
+
+    private static final class HunkBiomeResolver implements BiomeResolver {
+        private final IrisModdedChunkGenerator generator;
+        private final Hunk<PlatformBiome> biomes;
+        private final Registry<Biome> registry;
+        private final ChunkPos pos;
+        private final int dimMinY;
+        private final int height;
+
+        private HunkBiomeResolver(IrisModdedChunkGenerator generator, Hunk<PlatformBiome> biomes, Registry<Biome> registry, ChunkPos pos, int dimMinY, int height) {
+            this.generator = generator;
+            this.biomes = biomes;
+            this.registry = registry;
+            this.pos = pos;
+            this.dimMinY = dimMinY;
+            this.height = height;
+        }
+
+        @Override
+        public Holder<Biome> getNoiseBiome(int quartX, int quartY, int quartZ, Climate.Sampler sampler) {
+            int localX = QuartPos.toBlock(quartX) - pos.getMinBlockX();
+            int localZ = QuartPos.toBlock(quartZ) - pos.getMinBlockZ();
+            int bufferY = Math.max(0, Math.min(height - 1, QuartPos.toBlock(quartY) - dimMinY));
+            PlatformBiome biome = biomes.get(localX, bufferY, localZ);
+            return generator.holderFor(registry, biome);
+        }
+    }
+
+    @Override
+    public void applyCarvers(WorldGenRegion region, long seed, RandomState randomState, BiomeManager biomeManager, StructureManager structureManager, ChunkAccess chunk) {
+    }
+
+    @Override
+    public void buildSurface(WorldGenRegion region, StructureManager structureManager, RandomState randomState, ChunkAccess chunk) {
+    }
+
+    @Override
+    public void applyBiomeDecoration(WorldGenLevel level, ChunkAccess chunk, StructureManager structureManager) {
+    }
+
+    @Override
+    public void createStructures(RegistryAccess registryAccess, ChunkGeneratorStructureState structureState, StructureManager structureManager, ChunkAccess chunk, StructureTemplateManager templateManager, ResourceKey<Level> levelKey) {
+    }
+
+    @Override
+    public void createReferences(WorldGenLevel level, StructureManager structureManager, ChunkAccess chunk) {
+    }
+
+    @Override
+    public void spawnOriginalMobs(WorldGenRegion region) {
+    }
+
+    @Override
+    public int getGenDepth() {
+        Engine current = engineOrNull();
+        return current == null ? 384 : current.getMaxHeight() - current.getMinHeight();
+    }
+
+    @Override
+    public int getSeaLevel() {
+        Engine current = engineOrNull();
+        return current == null ? 63 : current.getMinHeight() + current.getDimension().getFluidHeight();
+    }
+
+    @Override
+    public int getMinY() {
+        Engine current = engineOrNull();
+        return current == null ? -64 : current.getMinHeight();
+    }
+
+    @Override
+    public int getBaseHeight(int x, int z, Heightmap.Types type, LevelHeightAccessor heightAccessor, RandomState randomState) {
+        Engine current = engineOrNull();
+        if (current == null) {
+            return heightAccessor.getMinY() + Math.min(heightAccessor.getHeight(), 64);
+        }
+        boolean ignoreFluid = type == Heightmap.Types.OCEAN_FLOOR || type == Heightmap.Types.OCEAN_FLOOR_WG;
+        return current.getMinHeight() + current.getHeight(x, z, ignoreFluid) + 1;
+    }
+
+    @Override
+    public NoiseColumn getBaseColumn(int x, int z, LevelHeightAccessor heightAccessor, RandomState randomState) {
+        int minY = heightAccessor.getMinY();
+        BlockState[] states = new BlockState[heightAccessor.getHeight()];
+        Engine current = engineOrNull();
+        BlockState airState = Blocks.AIR.defaultBlockState();
+        if (current == null) {
+            Arrays.fill(states, airState);
+            return new NoiseColumn(minY, states);
+        }
+        int surface = current.getMinHeight() + current.getHeight(x, z, true);
+        int fluid = current.getMinHeight() + current.getDimension().getFluidHeight();
+        BlockState stone = Blocks.STONE.defaultBlockState();
+        BlockState water = Blocks.WATER.defaultBlockState();
+        int solidEnd = Math.max(0, Math.min(states.length, surface - minY + 1));
+        int fluidEnd = Math.max(solidEnd, Math.max(0, Math.min(states.length, fluid - minY + 1)));
+        Arrays.fill(states, 0, solidEnd, stone);
+        Arrays.fill(states, solidEnd, fluidEnd, water);
+        Arrays.fill(states, fluidEnd, states.length, airState);
+        return new NoiseColumn(minY, states);
+    }
+
+    @Override
+    public void addDebugScreenInfo(List<String> info, RandomState randomState, BlockPos pos) {
+        info.add("Iris dimension: " + dimensionKey);
+    }
+
+    private record SpawnTableKey(Biome biome, MobCategory category) {
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/MainWorldService.java

@@ -0,0 +1,199 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.stream.Stream;
+
+public final class MainWorldService {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+    private static final String PRESET_NAMESPACE = "irisworldgen";
+    private static final String MARKER_NAME = "mainworld.pending";
+    private static final String[] VANILLA_DIMENSION_FOLDERS = {
+            "region",
+            "entities",
+            "poi",
+            "mantle",
+            "dimensions/minecraft/overworld",
+            "dimensions/minecraft/the_nether",
+            "dimensions/minecraft/the_end",
+            "DIM-1",
+            "DIM1"
+    };
+
+    private MainWorldService() {
+    }
+
+    public static String presetIdFor(String packRef) {
+        String value = packRef.trim();
+        int colon = value.indexOf(':');
+        String pack = colon >= 0 ? value.substring(0, colon) : value;
+        String dimension = colon >= 0 ? value.substring(colon + 1) : value;
+        String presetKey = dimension.equals(pack) ? pack : pack + "_" + dimension;
+        return PRESET_NAMESPACE + ":" + presetKey;
+    }
+
+    public static void reconcileEarly() {
+        try {
+            ModdedModConfig config = ModdedModConfig.get();
+            String pack = config.mainWorldPack();
+            if (pack == null || pack.isBlank()) {
+                return;
+            }
+            Path properties = instanceRoot().resolve("server.properties");
+            String target = presetIdFor(pack);
+            String currentType = readProperty(properties, "level-type");
+            if (!target.equals(currentType)) {
+                writeLevelProperties(properties, target, config.mainWorldSeed());
+                markPending();
+                LOGGER.warn("Iris main world '{}' staged: server.properties level-type set to {}. Restart again to generate it (this boot still uses the previous overworld; player data is kept).", pack, target);
+                return;
+            }
+            if (!isPending()) {
+                return;
+            }
+            String levelName = firstNonBlank(readProperty(properties, "level-name"), "world");
+            wipeVanillaDimensions(instanceRoot().resolve(levelName));
+            clearPending();
+            LOGGER.warn("Iris main world '{}' generated fresh: cleared the previous overworld/nether/end so this boot regenerates them as {} (player data kept).", pack, target);
+        } catch (Throwable e) {
+            LOGGER.error("Iris main world reconciliation failed", e);
+        }
+    }
+
+    public static boolean stage(String packRef, long seed) {
+        try {
+            Path properties = instanceRoot().resolve("server.properties");
+            writeLevelProperties(properties, presetIdFor(packRef), seed);
+            markPending();
+            return true;
+        } catch (IOException e) {
+            LOGGER.error("Iris failed to stage the main world in server.properties", e);
+            return false;
+        }
+    }
+
+    public static void clearOverride() {
+        try {
+            clearPending();
+        } catch (IOException e) {
+            LOGGER.error("Iris failed to clear the pending main world marker", e);
+        }
+    }
+
+    private static Path instanceRoot() {
+        return ModdedEngineBootstrap.loader().configDir().getParent();
+    }
+
+    private static Path markerFile() {
+        return ModdedEngineBootstrap.loader().configDir().resolve("irisworldgen").resolve(MARKER_NAME);
+    }
+
+    private static boolean isPending() {
+        return Files.isRegularFile(markerFile());
+    }
+
+    private static void markPending() throws IOException {
+        Path marker = markerFile();
+        Files.createDirectories(marker.getParent());
+        Files.writeString(marker, "pending", StandardCharsets.UTF_8);
+    }
+
+    private static void clearPending() throws IOException {
+        Files.deleteIfExists(markerFile());
+    }
+
+    private static String readProperty(Path properties, String key) throws IOException {
+        if (!Files.isRegularFile(properties)) {
+            return null;
+        }
+        List<String> lines = Files.readAllLines(properties, StandardCharsets.UTF_8);
+        String prefix = key + "=";
+        for (String line : lines) {
+            if (line.startsWith(prefix)) {
+                return unescape(line.substring(prefix.length()).trim());
+            }
+        }
+        return null;
+    }
+
+    private static void writeLevelProperties(Path properties, String target, long seed) throws IOException {
+        List<String> lines = Files.isRegularFile(properties)
+                ? new ArrayList<>(Files.readAllLines(properties, StandardCharsets.UTF_8))
+                : new ArrayList<>();
+        setProperty(lines, "level-type", escape(target));
+        if (seed != 0L) {
+            setProperty(lines, "level-seed", Long.toString(seed));
+        }
+        Files.write(properties, lines, StandardCharsets.UTF_8);
+    }
+
+    private static void setProperty(List<String> lines, String key, String value) {
+        String prefix = key + "=";
+        for (int i = 0; i < lines.size(); i++) {
+            if (lines.get(i).startsWith(prefix)) {
+                lines.set(i, prefix + value);
+                return;
+            }
+        }
+        lines.add(prefix + value);
+    }
+
+    private static void wipeVanillaDimensions(Path worldRoot) throws IOException {
+        Files.deleteIfExists(worldRoot.resolve("level.dat"));
+        Files.deleteIfExists(worldRoot.resolve("level.dat_old"));
+        for (String folder : VANILLA_DIMENSION_FOLDERS) {
+            deleteRecursively(worldRoot.resolve(folder));
+        }
+    }
+
+    private static void deleteRecursively(Path path) throws IOException {
+        if (!Files.exists(path)) {
+            return;
+        }
+        List<Path> entries = new ArrayList<>();
+        try (Stream<Path> walk = Files.walk(path)) {
+            walk.sorted(Comparator.comparingInt(Path::getNameCount).reversed()).forEach(entries::add);
+        }
+        for (Path entry : entries) {
+            Files.deleteIfExists(entry);
+        }
+    }
+
+    private static String escape(String value) {
+        return value.replace(":", "\\:");
+    }
+
+    private static String unescape(String value) {
+        return value.replace("\\:", ":").replace("\\=", "=");
+    }
+
+    private static String firstNonBlank(String value, String fallback) {
+        return value == null || value.isBlank() ? fallback : value;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedBiome.java

@@ -0,0 +1,58 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.spi.PlatformBiome;
+import net.minecraft.world.level.biome.Biome;
+
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class ModdedBiome implements PlatformBiome {
+    private static final ConcurrentHashMap<String, ModdedBiome> CACHE = new ConcurrentHashMap<>();
+
+    private final Biome biome;
+    private final String key;
+    private final String namespace;
+
+    private ModdedBiome(Biome biome, String key) {
+        this.biome = biome;
+        this.key = key;
+        int colon = key.indexOf(':');
+        this.namespace = colon >= 0 ? key.substring(0, colon) : "minecraft";
+    }
+
+    public static ModdedBiome of(Biome biome, String key) {
+        return CACHE.computeIfAbsent(key, (String k) -> new ModdedBiome(biome, k));
+    }
+
+    @Override
+    public String key() {
+        return key;
+    }
+
+    @Override
+    public String namespace() {
+        return namespace;
+    }
+
+    @Override
+    public Object nativeHandle() {
+        return biome;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedBiomeWriter.java

@@ -0,0 +1,142 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.iris.engine.object.IrisBiomeCustom;
+import art.arcane.iris.spi.PlatformBiome;
+import art.arcane.iris.spi.PlatformBiomeWriter;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.world.level.biome.Biome;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Supplier;
+
+public final class ModdedBiomeWriter implements PlatformBiomeWriter {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+    private static final String VANILLA_FALLBACK_KEY = "minecraft:plains";
+
+    private final Supplier<MinecraftServer> server;
+
+    public ModdedBiomeWriter(Supplier<MinecraftServer> server) {
+        this.server = server;
+    }
+
+    @Override
+    public int biomeIdFor(String key) {
+        Registry<Biome> registry = biomeRegistry();
+        if (registry == null) {
+            return 0;
+        }
+        int direct = idForKey(registry, key);
+        if (direct >= 0) {
+            return direct;
+        }
+        int derivative = idForDerivative(registry, key);
+        if (derivative >= 0) {
+            return derivative;
+        }
+        return fallbackId(registry);
+    }
+
+    @Override
+    public List<PlatformBiome> allBiomes() {
+        Registry<Biome> registry = biomeRegistry();
+        List<PlatformBiome> biomes = new ArrayList<>();
+        if (registry == null) {
+            return biomes;
+        }
+        for (Identifier identifier : registry.keySet()) {
+            Biome biome = registry.getValue(identifier);
+            if (biome != null) {
+                biomes.add(ModdedBiome.of(biome, identifier.toString()));
+            }
+        }
+        return biomes;
+    }
+
+    private int idForKey(Registry<Biome> registry, String key) {
+        Identifier identifier = Identifier.tryParse(key);
+        if (identifier == null) {
+            return -1;
+        }
+        Biome biome = registry.getValue(identifier);
+        return biome == null ? -1 : registry.getId(biome);
+    }
+
+    private int idForDerivative(Registry<Biome> registry, String key) {
+        int colon = key.indexOf(':');
+        if (colon <= 0 || colon >= key.length() - 1) {
+            return -1;
+        }
+        String dimensionLoadKey = key.substring(0, colon);
+        String customBiomeId = key.substring(colon + 1);
+        IrisBiome owner = findCustomBiomeOwner(dimensionLoadKey, customBiomeId);
+        if (owner == null) {
+            return -1;
+        }
+        String derivativeKey = owner.getVanillaDerivativeKey();
+        if (derivativeKey == null) {
+            return -1;
+        }
+        return idForKey(registry, derivativeKey);
+    }
+
+    private IrisBiome findCustomBiomeOwner(String dimensionLoadKey, String customBiomeId) {
+        for (Engine engine : ModdedWorldEngines.activeEngines()) {
+            if (engine == null || engine.isClosed()) {
+                continue;
+            }
+            if (!dimensionLoadKey.equalsIgnoreCase(engine.getDimension().getLoadKey())) {
+                continue;
+            }
+            for (IrisBiome biome : engine.getDimension().getAllBiomes(engine)) {
+                if (!biome.isCustom()) {
+                    continue;
+                }
+                for (IrisBiomeCustom custom : biome.getCustomDerivitives()) {
+                    if (customBiomeId.equals(custom.getId())) {
+                        return biome;
+                    }
+                }
+            }
+        }
+        return null;
+    }
+
+    private int fallbackId(Registry<Biome> registry) {
+        int plains = idForKey(registry, VANILLA_FALLBACK_KEY);
+        return plains >= 0 ? plains : 0;
+    }
+
+    private Registry<Biome> biomeRegistry() {
+        MinecraftServer instance = server.get();
+        if (instance == null) {
+            return null;
+        }
+        return instance.registryAccess().lookupOrThrow(Registries.BIOME);
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedBlockBuffer.java

@@ -0,0 +1,90 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.spi.PlatformBlockState;
+import art.arcane.iris.util.project.hunk.Hunk;
+
+public final class ModdedBlockBuffer implements Hunk<PlatformBlockState> {
+    private final PlatformBlockState[] data;
+    private final PlatformBlockState air;
+    private final int height;
+
+    public ModdedBlockBuffer(int height, PlatformBlockState air) {
+        this.data = new PlatformBlockState[16 * height * 16];
+        this.air = air;
+        this.height = height;
+    }
+
+    private int index(int x, int y, int z) {
+        return (y * 16 + z) * 16 + x;
+    }
+
+    public boolean isAir(int x, int y, int z) {
+        return data[index(x, y, z)] == null;
+    }
+
+    @Override
+    public int getWidth() {
+        return 16;
+    }
+
+    @Override
+    public int getDepth() {
+        return 16;
+    }
+
+    @Override
+    public int getHeight() {
+        return height;
+    }
+
+    @Override
+    public void set(int x, int y, int z, PlatformBlockState t) {
+        if (t == null) {
+            return;
+        }
+        if (x < 0 || y < 0 || z < 0 || x >= 16 || y >= height || z >= 16) {
+            return;
+        }
+        data[index(x, y, z)] = t;
+    }
+
+    @Override
+    public void setRaw(int x, int y, int z, PlatformBlockState t) {
+        if (t == null) {
+            return;
+        }
+        data[index(x, y, z)] = t;
+    }
+
+    @Override
+    public PlatformBlockState getRaw(int x, int y, int z) {
+        PlatformBlockState state = data[index(x, y, z)];
+        return state == null ? air : state;
+    }
+
+    @Override
+    public PlatformBlockState get(int x, int y, int z) {
+        if (x < 0 || y < 0 || z < 0 || x >= 16 || y >= height || z >= 16) {
+            return air;
+        }
+        return getRaw(x, y, z);
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedBlockResolution.java

@@ -0,0 +1,504 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.iris.modded.api.ModdedCustomContentRegistry;
+import art.arcane.iris.spi.IrisLogging;
+import art.arcane.volmlib.util.data.UnresolvedKeyLog;
+import com.mojang.brigadier.StringReader;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import net.minecraft.commands.arguments.blocks.BlockStateParser;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.world.level.EmptyBlockGetter;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.LeavesBlock;
+import net.minecraft.world.level.block.PointedDripstoneBlock;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.block.state.properties.BlockStateProperties;
+import net.minecraft.world.level.block.state.properties.SpeleothemThickness;
+import net.minecraft.world.level.block.state.properties.Property;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public final class ModdedBlockResolution {
+    private static final Set<Block> FOLIAGE = blockSet(
+            "poppy", "dandelion", "cornflower", "sweet_berry_bush", "crimson_roots", "warped_roots",
+            "nether_sprouts", "allium", "azure_bluet", "blue_orchid", "oxeye_daisy", "lily_of_the_valley",
+            "wither_rose", "dark_oak_sapling", "acacia_sapling", "jungle_sapling", "birch_sapling",
+            "spruce_sapling", "oak_sapling", "orange_tulip", "pink_tulip", "red_tulip", "white_tulip",
+            "fern", "large_fern", "short_grass", "tall_grass");
+    private static final Set<Block> DECORANT = decorantSet();
+    private static final Set<Block> LIT = blockSet(
+            "glowstone", "amethyst_cluster", "small_amethyst_bud", "medium_amethyst_bud", "large_amethyst_bud",
+            "end_rod", "soul_sand", "torch", "redstone_torch", "soul_torch", "redstone_wall_torch", "wall_torch",
+            "soul_wall_torch", "lantern", "candle", "jack_o_lantern", "redstone_lamp", "magma_block", "light",
+            "shroomlight", "sea_lantern", "soul_lantern", "fire", "soul_fire", "sea_pickle", "brewing_stand",
+            "redstone_ore");
+    private static final Set<Block> STORAGE = blockSet(
+            "chest", "smoker", "trapped_chest", "shulker_box", "white_shulker_box", "orange_shulker_box",
+            "magenta_shulker_box", "light_blue_shulker_box", "yellow_shulker_box", "lime_shulker_box",
+            "pink_shulker_box", "gray_shulker_box", "light_gray_shulker_box", "cyan_shulker_box",
+            "purple_shulker_box", "blue_shulker_box", "brown_shulker_box", "green_shulker_box",
+            "red_shulker_box", "black_shulker_box", "barrel", "dispenser", "dropper", "hopper", "furnace",
+            "blast_furnace");
+    private static final Set<Block> STORAGE_CHEST = storageChestSet();
+    private static final Set<Block> DEEPSLATE = blockSet(
+            "deepslate", "deepslate_bricks", "deepslate_brick_slab", "deepslate_brick_stairs",
+            "deepslate_brick_wall", "deepslate_tile_slab", "deepslate_tiles", "deepslate_tile_stairs",
+            "deepslate_tile_wall", "cracked_deepslate_tiles", "deepslate_coal_ore", "deepslate_iron_ore",
+            "deepslate_copper_ore", "deepslate_diamond_ore", "deepslate_emerald_ore", "deepslate_gold_ore",
+            "deepslate_lapis_ore", "deepslate_redstone_ore");
+    private static final Map<Block, Block> NORMAL_TO_DEEPSLATE = oreMap(false);
+    private static final Map<Block, Block> DEEPSLATE_TO_NORMAL = oreMap(true);
+    private static final Set<Block> FOLIAGE_PLANTABLE_STATE = blockSet(
+            "grass_block", "moss_block", "rooted_dirt", "dirt", "coarse_dirt", "podzol");
+    private static final Set<Block> FOLIAGE_PLANTABLE_MATERIAL = blockSet(
+            "grass_block", "moss_block", "dirt", "tall_grass", "tall_seagrass", "large_fern", "sunflower",
+            "peony", "lilac", "rose_bush", "rooted_dirt", "coarse_dirt", "podzol");
+    private static final Set<Block> PLACE_ONTO_LEAVES = blockSet(
+            "acacia_leaves", "birch_leaves", "dark_oak_leaves", "jungle_leaves", "oak_leaves", "spruce_leaves");
+    private static final BlockState AIR = Blocks.AIR.defaultBlockState();
+    private static final UnresolvedKeyLog UNRESOLVED = new UnresolvedKeyLog("Iris modded block resolution", 30_000L);
+
+    private ModdedBlockResolution() {
+    }
+
+    record Parsed(BlockState state, Map<Property<?>, Comparable<?>> properties) {
+    }
+
+    private static Set<Block> blockSet(String... ids) {
+        Set<Block> blocks = new HashSet<>();
+        for (String id : ids) {
+            Identifier identifier = Identifier.parse("minecraft:" + id);
+            if (BuiltInRegistries.BLOCK.containsKey(identifier)) {
+                blocks.add(BuiltInRegistries.BLOCK.getValue(identifier));
+            }
+        }
+        return blocks;
+    }
+
+    private static Set<Block> decorantSet() {
+        Set<Block> blocks = blockSet(
+                "short_grass", "tall_grass", "fern", "large_fern", "cornflower", "sunflower", "chorus_flower",
+                "poppy", "dandelion", "oxeye_daisy", "orange_tulip", "pink_tulip", "red_tulip", "white_tulip",
+                "lilac", "dead_bush", "sweet_berry_bush", "rose_bush", "wither_rose", "allium", "blue_orchid",
+                "lily_of_the_valley", "crimson_fungus", "warped_fungus", "red_mushroom", "brown_mushroom",
+                "crimson_roots", "azure_bluet", "weeping_vines", "weeping_vines_plant", "warped_roots",
+                "nether_sprouts", "twisting_vines", "twisting_vines_plant", "sugar_cane", "wheat", "potatoes",
+                "carrots", "beetroots", "nether_wart", "sea_pickle", "seagrass", "tall_seagrass",
+                "acacia_button", "birch_button", "crimson_button", "dark_oak_button", "jungle_button",
+                "oak_button", "polished_blackstone_button", "spruce_button", "stone_button", "warped_button",
+                "torch", "soul_torch", "glow_lichen", "vine", "sculk_vein");
+        blocks.addAll(FOLIAGE);
+        return blocks;
+    }
+
+    private static Set<Block> storageChestSet() {
+        Set<Block> blocks = new HashSet<>(STORAGE);
+        blocks.remove(Blocks.SMOKER);
+        blocks.remove(Blocks.FURNACE);
+        blocks.remove(Blocks.BLAST_FURNACE);
+        return blocks;
+    }
+
+    private static Map<Block, Block> oreMap(boolean deepslateToNormal) {
+        String[][] pairs = {
+                {"coal_ore", "deepslate_coal_ore"},
+                {"emerald_ore", "deepslate_emerald_ore"},
+                {"diamond_ore", "deepslate_diamond_ore"},
+                {"copper_ore", "deepslate_copper_ore"},
+                {"gold_ore", "deepslate_gold_ore"},
+                {"iron_ore", "deepslate_iron_ore"},
+                {"lapis_ore", "deepslate_lapis_ore"},
+                {"redstone_ore", "deepslate_redstone_ore"}
+        };
+        Map<Block, Block> map = new HashMap<>();
+        for (String[] pair : pairs) {
+            Block normal = BuiltInRegistries.BLOCK.getValue(Identifier.parse("minecraft:" + pair[0]));
+            Block deep = BuiltInRegistries.BLOCK.getValue(Identifier.parse("minecraft:" + pair[1]));
+            if (deepslateToNormal) {
+                map.put(deep, normal);
+            } else {
+                map.put(normal, deep);
+            }
+        }
+        return map;
+    }
+
+    private static void warnUnresolved(String key, String message) {
+        if (UNRESOLVED.firstOccurrence(key)) {
+            IrisLogging.warn(message);
+        }
+        String summary = UNRESOLVED.pollSummary();
+        if (summary != null) {
+            IrisLogging.warn(summary);
+        }
+    }
+
+    public static BlockState airState() {
+        return AIR;
+    }
+
+    public static ModdedBlockState getAir() {
+        return ModdedBlockState.of(AIR, null);
+    }
+
+    public static ModdedBlockState get(String bdxf) {
+        Parsed parsed = resolveGet(bdxf);
+        return ModdedBlockState.of(parsed.state(), parsed.properties());
+    }
+
+    public static ModdedBlockState getNoCompat(String bdxf) {
+        Parsed parsed = resolveNoCompat(bdxf);
+        return ModdedBlockState.of(parsed.state(), parsed.properties());
+    }
+
+    public static ModdedBlockState getOrNull(String bdxf) {
+        return getOrNull(bdxf, false);
+    }
+
+    public static ModdedBlockState getOrNull(String bdxf, boolean warn) {
+        Parsed parsed = resolveOrNull(bdxf, warn);
+        return parsed == null ? null : ModdedBlockState.of(parsed.state(), parsed.properties());
+    }
+
+    static Parsed resolveGet(String bdxf) {
+        Parsed parsed = resolveOrNull(bdxf, false);
+        if (parsed != null) {
+            return parsed;
+        }
+        IrisLogging.error("Can't find block data for " + bdxf);
+        return new Parsed(AIR, null);
+    }
+
+    static Parsed resolveNoCompat(String bdxf) {
+        Parsed parsed = resolveOrNull(bdxf, true);
+        if (parsed != null) {
+            return parsed;
+        }
+        return new Parsed(AIR, null);
+    }
+
+    static Parsed resolveOrNull(String bdxf, boolean warn) {
+        try {
+            String bd = bdxf.trim();
+
+            if (bd.startsWith("minecraft:cauldron[level=")) {
+                bd = bd.replaceAll("\\Q:cauldron[\\E", ":water_cauldron[");
+            }
+
+            if (bd.equals("minecraft:grass_path")) {
+                return new Parsed(Blocks.DIRT_PATH.defaultBlockState(), null);
+            }
+
+            Parsed bdx = parseBlockData(bd, warn);
+
+            if (bdx == null) {
+                BlockState provided = ModdedCustomContentRegistry.resolveBlock(bd);
+                if (provided != null) {
+                    return new Parsed(provided, null);
+                }
+                if (warn) {
+                    warnUnresolved(bd, "Unknown Block Data '" + bd + "'");
+                }
+                return new Parsed(AIR, null);
+            }
+
+            return bdx;
+        } catch (Throwable e) {
+            e.printStackTrace();
+            if (warn) {
+                warnUnresolved(bdxf, "Unknown Block Data '" + bdxf + "'");
+            }
+        }
+
+        return null;
+    }
+
+    public static ModdedBlockState strictParse(String key) {
+        Parsed parsed = parseStrict(key);
+        return ModdedBlockState.of(parsed.state(), parsed.properties());
+    }
+
+    private static Parsed parseStrict(String key) {
+        StringReader reader = new StringReader(key);
+        BlockStateParser.BlockResult result;
+        try {
+            result = BlockStateParser.parseForBlock(BuiltInRegistries.BLOCK, reader, false);
+        } catch (CommandSyntaxException e) {
+            throw new IllegalArgumentException("Could not parse data: " + key, e);
+        }
+        if (reader.canRead()) {
+            throw new IllegalArgumentException("Could not parse remainder: " + reader.getRemaining());
+        }
+        return new Parsed(result.blockState(), result.properties());
+    }
+
+    private static Parsed createBlockData(String s, boolean warn) {
+        try {
+            return parseStrict(s);
+        } catch (IllegalArgumentException e) {
+            if (s.contains("[")) {
+                return createBlockData(s.split("\\Q[\\E")[0], warn);
+            }
+        }
+
+        if (warn) {
+            IrisLogging.warn("Can't find block data for " + s);
+        }
+        return null;
+    }
+
+    private static Parsed materialBlockData(String ix) {
+        if (ix.contains("[") || ix.contains(":")) {
+            return null;
+        }
+        Identifier identifier = Identifier.tryParse("minecraft:" + ix.toLowerCase(Locale.ROOT));
+        if (identifier == null || !BuiltInRegistries.BLOCK.containsKey(identifier)) {
+            return null;
+        }
+        return new Parsed(BuiltInRegistries.BLOCK.getValue(identifier).defaultBlockState(), null);
+    }
+
+    private static Parsed parseBlockData(String ix, boolean warn) {
+        try {
+            Parsed bx = createBlockData(ix.toLowerCase(), warn);
+
+            if (bx == null) {
+                bx = createBlockData("minecraft:" + ix.toLowerCase(), warn);
+            }
+
+            if (bx == null) {
+                bx = materialBlockData(ix);
+            }
+
+            if (bx == null) {
+                if (warn) {
+                    warnUnresolved(ix, "Unknown Block Data: " + ix);
+                }
+                return null;
+            }
+
+            if (bx.state().getBlock() instanceof LeavesBlock) {
+                BlockState mutated = bx.state().setValue(LeavesBlock.PERSISTENT, shouldPreventLeafDecay());
+                bx = new Parsed(mutated, bx.properties());
+            }
+
+            return bx;
+        } catch (Throwable e) {
+            String block = ix.contains(":") ? ix.split(":")[1].toLowerCase() : ix.toLowerCase();
+            String state = block.contains("[") ? block.split("\\Q[\\E")[1].split("\\Q]\\E")[0] : "";
+            Map<String, String> stateMap = new HashMap<>();
+            if (!state.equals("")) {
+                Arrays.stream(state.split(",")).forEach((String s) -> stateMap.put(s.split("=")[0], s.split("=")[1]));
+            }
+            block = block.split("\\Q[\\E")[0];
+
+            switch (block) {
+                case "cauldron" -> block = "water_cauldron";
+                case "grass_path" -> block = "dirt_path";
+                case "concrete" -> block = "white_concrete";
+                case "wool" -> block = "white_wool";
+                case "beetroots" -> {
+                    if (stateMap.containsKey("age")) {
+                        String updated = stateMap.get("age");
+                        switch (updated) {
+                            case "7" -> updated = "3";
+                            case "3", "4", "5" -> updated = "2";
+                            case "1", "2" -> updated = "1";
+                        }
+                        stateMap.put("age", updated);
+                    }
+                }
+            }
+
+            Map<String, String> newStates = new HashMap<>();
+            for (String key : stateMap.keySet()) {
+                createBlockData(block + "[" + key + "=" + stateMap.get(key) + "]", false);
+                newStates.put(key, stateMap.get(key));
+            }
+
+            String joined = newStates.entrySet().stream()
+                    .map((Map.Entry<String, String> entry) -> entry.getKey() + "=" + entry.getValue())
+                    .collect(Collectors.joining(","));
+            if (!joined.equals("")) {
+                joined = "[" + joined + "]";
+            }
+            String newBlock = block + joined;
+            IrisLogging.debug("Converting " + ix + " to " + newBlock);
+
+            try {
+                return createBlockData(newBlock, false);
+            } catch (Throwable e1) {
+                IrisLogging.reportError(e1);
+            }
+
+            return null;
+        }
+    }
+
+    private static boolean shouldPreventLeafDecay() {
+        return IrisSettings.get().getGenerator().isPreventLeafDecay();
+    }
+
+    public static BlockState toDeepSlateOre(BlockState block, BlockState ore) {
+        Block key = ore.getBlock();
+
+        if (isDeepSlate(block)) {
+            Block mapped = NORMAL_TO_DEEPSLATE.get(key);
+            if (mapped != null) {
+                return mapped.defaultBlockState();
+            }
+        } else {
+            Block mapped = DEEPSLATE_TO_NORMAL.get(key);
+            if (mapped != null) {
+                return mapped.defaultBlockState();
+            }
+        }
+
+        return ore;
+    }
+
+    public static boolean isDeepSlate(BlockState state) {
+        return DEEPSLATE.contains(state.getBlock());
+    }
+
+    public static boolean isOre(BlockState state) {
+        return BuiltInRegistries.BLOCK.getKey(state.getBlock()).getPath().endsWith("_ore");
+    }
+
+    public static boolean isAir(BlockState state) {
+        if (state == null) {
+            return true;
+        }
+        Block block = state.getBlock();
+        return block == Blocks.AIR || block == Blocks.CAVE_AIR || block == Blocks.VOID_AIR;
+    }
+
+    public static boolean isSolid(BlockState state) {
+        if (state == null) {
+            return false;
+        }
+        return isSolidMaterial(state.getBlock());
+    }
+
+    private static boolean isSolidMaterial(Block block) {
+        return block.defaultBlockState().blocksMotion();
+    }
+
+    public static boolean isOccluding(BlockState state) {
+        return state.getBlock().defaultBlockState().isRedstoneConductor(EmptyBlockGetter.INSTANCE, BlockPos.ZERO);
+    }
+
+    public static boolean isFluid(BlockState state) {
+        Block block = state.getBlock();
+        return block == Blocks.WATER || block == Blocks.LAVA;
+    }
+
+    public static boolean isWater(BlockState state) {
+        return state.getBlock() == Blocks.WATER;
+    }
+
+    public static boolean isWaterLogged(BlockState state) {
+        return state.hasProperty(BlockStateProperties.WATERLOGGED) && state.getValue(BlockStateProperties.WATERLOGGED);
+    }
+
+    public static boolean isLit(BlockState state) {
+        return LIT.contains(state.getBlock());
+    }
+
+    public static boolean isUpdatable(BlockState state) {
+        return isStorage(state)
+                || (state.getBlock() instanceof PointedDripstoneBlock
+                && state.getValue(PointedDripstoneBlock.THICKNESS) == SpeleothemThickness.TIP);
+    }
+
+    public static boolean isFoliage(BlockState state) {
+        return FOLIAGE.contains(state.getBlock());
+    }
+
+    public static boolean isFoliagePlantable(BlockState state) {
+        return FOLIAGE_PLANTABLE_STATE.contains(state.getBlock());
+    }
+
+    public static boolean isDecorant(BlockState state) {
+        return DECORANT.contains(state.getBlock());
+    }
+
+    public static boolean isStorage(BlockState state) {
+        return STORAGE.contains(state.getBlock());
+    }
+
+    public static boolean isStorageChest(BlockState state) {
+        return STORAGE_CHEST.contains(state.getBlock());
+    }
+
+    public static boolean isVineBlock(BlockState state) {
+        Block block = state.getBlock();
+        return block == Blocks.VINE || block == Blocks.SCULK_VEIN || block == Blocks.GLOW_LICHEN;
+    }
+
+    public static boolean hasTileEntity(BlockState state) {
+        return state.getBlock().defaultBlockState().hasBlockEntity();
+    }
+
+    public static boolean canPlaceOnto(Block mat, Block onto) {
+        if ((onto == Blocks.CRIMSON_NYLIUM || onto == Blocks.WARPED_NYLIUM)
+                && (mat == Blocks.CRIMSON_FUNGUS || mat == Blocks.CRIMSON_ROOTS
+                || mat == Blocks.WARPED_FUNGUS || mat == Blocks.WARPED_ROOTS)) {
+            return true;
+        }
+
+        if (FOLIAGE.contains(mat)) {
+            if (!FOLIAGE_PLANTABLE_MATERIAL.contains(onto)) {
+                return false;
+            }
+        }
+
+        if (onto == Blocks.AIR || onto == Blocks.CAVE_AIR || onto == Blocks.VOID_AIR) {
+            return false;
+        }
+
+        if (onto == Blocks.GRASS_BLOCK && mat == Blocks.DEAD_BUSH) {
+            return false;
+        }
+
+        if (onto == Blocks.DIRT_PATH) {
+            if (!isSolidMaterial(mat)) {
+                return false;
+            }
+        }
+
+        if (PLACE_ONTO_LEAVES.contains(onto)) {
+            return isSolidMaterial(mat);
+        }
+
+        return true;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedBlockState.java

@@ -0,0 +1,308 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.spi.PlatformBlockState;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.block.state.properties.Property;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
+
+public final class ModdedBlockState implements PlatformBlockState {
+    private static final ConcurrentHashMap<String, ModdedBlockState> CACHE = new ConcurrentHashMap<>();
+
+    private final BlockState state;
+    private final Map<Property<?>, Comparable<?>> parsedProperties;
+    private final String key;
+    private final String namespace;
+    private volatile Boolean air;
+    private volatile Boolean solid;
+    private volatile Boolean occluding;
+    private volatile Boolean fluid;
+    private volatile Boolean water;
+    private volatile Boolean foliage;
+    private volatile Boolean decorant;
+
+    private ModdedBlockState(BlockState state, Map<Property<?>, Comparable<?>> parsedProperties, String key) {
+        this.state = state;
+        this.parsedProperties = parsedProperties;
+        this.key = key;
+        this.namespace = parseNamespace(key);
+    }
+
+    public static ModdedBlockState of(BlockState state, Map<Property<?>, Comparable<?>> parsedProperties) {
+        String key = serialize(state);
+        return CACHE.computeIfAbsent(key, (String k) -> new ModdedBlockState(state, parsedProperties, k));
+    }
+
+    public static String serialize(BlockState state) {
+        StringBuilder result = new StringBuilder(BuiltInRegistries.BLOCK.getKey(state.getBlock()).toString());
+        if (!state.isSingletonState()) {
+            result.append('[');
+            result.append(state.getValues()
+                    .map((Property.Value<?> value) -> value.property().getName() + "=" + value.valueName())
+                    .collect(Collectors.joining(",")));
+            result.append(']');
+        }
+        return result.toString();
+    }
+
+    public BlockState handle() {
+        return state;
+    }
+
+    Map<Property<?>, Comparable<?>> parsedProperties() {
+        return parsedProperties;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (this == other) {
+            return true;
+        }
+        if (!(other instanceof ModdedBlockState blockState)) {
+            return false;
+        }
+        return state.equals(blockState.state);
+    }
+
+    @Override
+    public int hashCode() {
+        return key.hashCode();
+    }
+
+    private static String parseNamespace(String key) {
+        String base = key;
+        int bracket = base.indexOf('[');
+        if (bracket >= 0) {
+            base = base.substring(0, bracket);
+        }
+        int colon = base.indexOf(':');
+        return colon >= 0 ? base.substring(0, colon) : "minecraft";
+    }
+
+    private static String mergeProperty(String key, String name, String value) {
+        int bracket = key.indexOf('[');
+        if (bracket < 0) {
+            return key + "[" + name + "=" + value + "]";
+        }
+        String base = key.substring(0, bracket);
+        String body = key.substring(bracket + 1, key.lastIndexOf(']'));
+        LinkedHashMap<String, String> properties = new LinkedHashMap<>();
+        for (String entry : body.split(",")) {
+            int equals = entry.indexOf('=');
+            if (equals < 0) {
+                continue;
+            }
+            properties.put(entry.substring(0, equals).trim(), entry.substring(equals + 1).trim());
+        }
+        properties.put(name, value);
+        StringBuilder merged = new StringBuilder(base).append('[');
+        boolean first = true;
+        for (Map.Entry<String, String> property : properties.entrySet()) {
+            if (!first) {
+                merged.append(',');
+            }
+            merged.append(property.getKey()).append('=').append(property.getValue());
+            first = false;
+        }
+        return merged.append(']').toString();
+    }
+
+    @Override
+    public String key() {
+        return key;
+    }
+
+    @Override
+    public String namespace() {
+        return namespace;
+    }
+
+    @Override
+    public boolean isAir() {
+        Boolean cached = air;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isAir(state);
+            air = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isSolid() {
+        Boolean cached = solid;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isSolid(state);
+            solid = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isOccluding() {
+        Boolean cached = occluding;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isOccluding(state);
+            occluding = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isCustom() {
+        return false;
+    }
+
+    @Override
+    public boolean isFluid() {
+        Boolean cached = fluid;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isFluid(state);
+            fluid = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isWater() {
+        Boolean cached = water;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isWater(state);
+            water = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isWaterLogged() {
+        return ModdedBlockResolution.isWaterLogged(state);
+    }
+
+    @Override
+    public boolean isLit() {
+        return ModdedBlockResolution.isLit(state);
+    }
+
+    @Override
+    public boolean isUpdatable() {
+        return ModdedBlockResolution.isUpdatable(state);
+    }
+
+    @Override
+    public boolean isFoliage() {
+        Boolean cached = foliage;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isFoliage(state);
+            foliage = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isFoliagePlantable() {
+        return ModdedBlockResolution.isFoliagePlantable(state);
+    }
+
+    @Override
+    public boolean isDecorant() {
+        Boolean cached = decorant;
+        if (cached == null) {
+            cached = ModdedBlockResolution.isDecorant(state);
+            decorant = cached;
+        }
+        return cached;
+    }
+
+    @Override
+    public boolean isStorage() {
+        return ModdedBlockResolution.isStorage(state);
+    }
+
+    @Override
+    public boolean isStorageChest() {
+        return ModdedBlockResolution.isStorageChest(state);
+    }
+
+    @Override
+    public boolean isOre() {
+        return ModdedBlockResolution.isOre(state);
+    }
+
+    @Override
+    public boolean isDeepSlate() {
+        return ModdedBlockResolution.isDeepSlate(state);
+    }
+
+    @Override
+    public boolean isVineBlock() {
+        return ModdedBlockResolution.isVineBlock(state);
+    }
+
+    @Override
+    public boolean canPlaceOnto(PlatformBlockState onto) {
+        return ModdedBlockResolution.canPlaceOnto(state.getBlock(), ((BlockState) onto.nativeHandle()).getBlock());
+    }
+
+    @Override
+    public boolean matches(PlatformBlockState other) {
+        if (!(other instanceof ModdedBlockState blockState)) {
+            return false;
+        }
+        if (state.getBlock() != blockState.state.getBlock()) {
+            return false;
+        }
+        if (state.equals(blockState.state)) {
+            return true;
+        }
+        if (blockState.parsedProperties == null) {
+            return false;
+        }
+        BlockState merged = state;
+        for (Map.Entry<Property<?>, Comparable<?>> entry : blockState.parsedProperties.entrySet()) {
+            merged = applyProperty(merged, entry.getKey(), entry.getValue());
+        }
+        return merged.equals(state);
+    }
+
+    @SuppressWarnings("unchecked")
+    private static <T extends Comparable<T>> BlockState applyProperty(BlockState state, Property<?> property, Comparable<?> value) {
+        return state.setValue((Property<T>) property, (T) value);
+    }
+
+    @Override
+    public boolean hasTileEntity() {
+        return ModdedBlockResolution.hasTileEntity(state);
+    }
+
+    @Override
+    public PlatformBlockState withProperty(String name, String value) {
+        String merged = mergeProperty(key, name, value);
+        return ModdedBlockResolution.strictParse(merged);
+    }
+
+    @Override
+    public Object nativeHandle() {
+        return state;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedDeathLoot.java

@@ -0,0 +1,130 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.InventorySlotType;
+import art.arcane.iris.engine.object.IrisLootTable;
+import art.arcane.iris.spi.IrisLogging;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.volmlib.util.math.RNG;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.item.ItemEntity;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.chunk.ChunkGenerator;
+
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class ModdedDeathLoot {
+    private static final String TAG_PREFIX = "iris_loot|";
+    private static final int LOOT_RNG_SALT = 345911;
+    private static final Set<String> WARNED_TABLES = ConcurrentHashMap.newKeySet();
+
+    private ModdedDeathLoot() {
+    }
+
+    public static void tag(LivingEntity entity, KList<String> tableKeys, int spawnX, int spawnY, int spawnZ, RNG rng) {
+        if (entity == null || tableKeys == null || tableKeys.isEmpty()) {
+            return;
+        }
+        entity.addTag(TAG_PREFIX + rng.getSeed() + "|" + spawnX + "|" + spawnY + "|" + spawnZ + "|" + String.join(",", tableKeys));
+    }
+
+    public static void handle(LivingEntity entity) {
+        if (entity == null || !(entity.level() instanceof ServerLevel level)) {
+            return;
+        }
+        String encoded = findTag(entity);
+        if (encoded == null) {
+            return;
+        }
+        String[] parts = encoded.substring(TAG_PREFIX.length()).split("\\|", 5);
+        if (parts.length < 5) {
+            IrisLogging.debug("Iris death loot: malformed loot tag '" + encoded + "'");
+            return;
+        }
+        long seed;
+        int spawnX;
+        int spawnY;
+        int spawnZ;
+        try {
+            seed = Long.parseLong(parts[0]);
+            spawnX = Integer.parseInt(parts[1]);
+            spawnY = Integer.parseInt(parts[2]);
+            spawnZ = Integer.parseInt(parts[3]);
+        } catch (NumberFormatException error) {
+            IrisLogging.debug("Iris death loot: malformed loot tag '" + encoded + "'");
+            return;
+        }
+        Engine engine = engineFor(level);
+        if (engine == null) {
+            return;
+        }
+        RNG lootRng = new RNG(seed).nextParallelRNG(LOOT_RNG_SALT);
+        KList<ItemStack> drops = new KList<>();
+        for (String key : parts[4].split(",")) {
+            String trimmed = key.trim();
+            if (trimmed.isEmpty()) {
+                continue;
+            }
+            IrisLootTable table = engine.getData().getLootLoader().load(trimmed);
+            if (table == null) {
+                if (WARNED_TABLES.add(trimmed)) {
+                    IrisLogging.warn("Iris death loot: unknown loot table '" + trimmed + "'");
+                }
+                continue;
+            }
+            drops.addAll(ModdedItemTranslator.loot(table, lootRng, InventorySlotType.STORAGE, level, spawnX, spawnY, spawnZ));
+        }
+        emit(level, entity, drops);
+    }
+
+    private static void emit(ServerLevel level, LivingEntity entity, KList<ItemStack> drops) {
+        double x = entity.getX();
+        double y = entity.getY() + 0.5D;
+        double z = entity.getZ();
+        for (ItemStack stack : drops) {
+            if (stack == null || stack.isEmpty()) {
+                continue;
+            }
+            ItemEntity itemEntity = new ItemEntity(level, x, y, z, stack);
+            itemEntity.setDefaultPickUpDelay();
+            level.addFreshEntity(itemEntity);
+        }
+    }
+
+    private static String findTag(LivingEntity entity) {
+        for (String tag : entity.entityTags()) {
+            if (tag.startsWith(TAG_PREFIX)) {
+                return tag;
+            }
+        }
+        return null;
+    }
+
+    private static Engine engineFor(ServerLevel level) {
+        ChunkGenerator generator = level.getChunkSource().getGenerator();
+        if (generator instanceof IrisModdedChunkGenerator irisGenerator) {
+            return irisGenerator.engineIfBound();
+        }
+        return null;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedDecoratorHooks.java

@@ -0,0 +1,117 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.engine.decorator.DecoratorPlatformHooks;
+import art.arcane.iris.engine.mantle.EngineMantle;
+import art.arcane.iris.spi.PlatformBlockState;
+import art.arcane.iris.util.project.hunk.Hunk;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.level.EmptyBlockGetter;
+import net.minecraft.world.level.block.SupportType;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.block.state.properties.BooleanProperty;
+import net.minecraft.world.level.block.state.properties.Property;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public final class ModdedDecoratorHooks implements DecoratorPlatformHooks.FaceFixer, DecoratorPlatformHooks.SurfaceSturdiness {
+    private static final Direction[] CARTESIAN = {Direction.NORTH, Direction.EAST, Direction.SOUTH, Direction.WEST, Direction.UP, Direction.DOWN};
+    private static final String[] FACE_NAMES = {"north", "east", "south", "west", "up", "down"};
+
+    @Override
+    public PlatformBlockState fixFaces(PlatformBlockState state, Hunk<PlatformBlockState> hunk, int rX, int rZ, int x, int y, int z, EngineMantle mantle) {
+        ModdedBlockState fabric = (ModdedBlockState) state;
+        BlockState cloned = fabric.handle();
+        Map<String, BooleanProperty> allowed = faceProperties(cloned);
+
+        for (Map.Entry<String, BooleanProperty> entry : allowed.entrySet()) {
+            if (cloned.getValue(entry.getValue())) {
+                cloned = cloned.setValue(entry.getValue(), Boolean.FALSE);
+            }
+        }
+
+        boolean found = false;
+        for (Direction f : CARTESIAN) {
+            int yy = y + f.getStepY();
+
+            PlatformBlockState rs = null;
+            if (mantle != null) {
+                rs = mantle.getMantle().get(x + f.getStepX(), yy, z + f.getStepZ(), PlatformBlockState.class);
+            }
+            BlockState r = rs == null ? (BlockState) EngineMantle.AIR.nativeHandle() : (BlockState) rs.nativeHandle();
+            if (isFaceSturdy(r, f.getOpposite())) {
+                BooleanProperty property = allowed.get(f.getSerializedName());
+                if (property != null) {
+                    found = true;
+                    cloned = cloned.setValue(property, Boolean.TRUE);
+                }
+                continue;
+            }
+
+            int xx = rX + f.getStepX();
+            int zz = rZ + f.getStepZ();
+            if (xx < 0 || xx > 15 || zz < 0 || zz > 15 || yy < 0 || yy > hunk.getHeight()) {
+                continue;
+            }
+
+            r = (BlockState) hunk.get(xx, yy, zz).nativeHandle();
+            if (isFaceSturdy(r, f.getOpposite())) {
+                BooleanProperty property = allowed.get(f.getSerializedName());
+                if (property != null) {
+                    found = true;
+                    cloned = cloned.setValue(property, Boolean.TRUE);
+                }
+            }
+        }
+
+        if (!found) {
+            String fallback = allowed.containsKey("down") ? "down" : "up";
+            BooleanProperty property = allowed.get(fallback);
+            if (property != null) {
+                cloned = cloned.setValue(property, Boolean.TRUE);
+            }
+        }
+
+        return ModdedBlockState.of(cloned, fabric.parsedProperties());
+    }
+
+    @Override
+    public boolean canGoOn(PlatformBlockState surface) {
+        return isFaceSturdy((BlockState) surface.nativeHandle(), Direction.UP);
+    }
+
+    private static boolean isFaceSturdy(BlockState state, Direction face) {
+        return state.isFaceSturdy(EmptyBlockGetter.INSTANCE, BlockPos.ZERO, face, SupportType.FULL);
+    }
+
+    private static Map<String, BooleanProperty> faceProperties(BlockState state) {
+        Map<String, BooleanProperty> properties = new LinkedHashMap<>();
+        for (String name : FACE_NAMES) {
+            for (Property<?> property : state.getProperties()) {
+                if (property.getName().equals(name) && property instanceof BooleanProperty bool) {
+                    properties.put(name, bool);
+                }
+            }
+        }
+        return properties;
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedDimensionManager.java

@@ -0,0 +1,331 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.iris.core.loader.IrisData;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.object.IrisDimension;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Holder;
+import net.minecraft.core.Registry;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.TicketType;
+import net.minecraft.world.entity.Relative;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.biome.BiomeManager;
+import net.minecraft.world.level.biome.Biomes;
+import net.minecraft.world.level.biome.FixedBiomeSource;
+import net.minecraft.world.level.dimension.BuiltinDimensionTypes;
+import net.minecraft.world.level.dimension.DimensionType;
+import net.minecraft.world.level.dimension.LevelStem;
+import net.minecraft.world.level.levelgen.Heightmap;
+import net.minecraft.world.level.storage.DerivedLevelData;
+import net.minecraft.world.level.storage.LevelStorageSource;
+import net.minecraft.world.level.storage.ServerLevelData;
+import net.minecraft.world.level.storage.WorldData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executor;
+
+public final class ModdedDimensionManager {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+    private static final Object LOCK = new Object();
+    private static final ConcurrentHashMap<String, Handle> HANDLES = new ConcurrentHashMap<>();
+    private static final Set<String> TYPE_FALLBACK_WARNINGS = ConcurrentHashMap.newKeySet();
+    private static final TicketType TELEPORT_WARM_TICKET = new TicketType(TicketType.NO_TIMEOUT, TicketType.FLAG_LOADING);
+    private static volatile ModdedServerAccess access;
+
+    private ModdedDimensionManager() {
+    }
+
+    public static void bindAccess(ModdedServerAccess serverAccess) {
+        access = serverAccess;
+    }
+
+    public static void clear() {
+        HANDLES.clear();
+    }
+
+    public static Handle handle(String dimensionId) {
+        return HANDLES.get(dimensionId);
+    }
+
+    public static List<Handle> handles() {
+        return new ArrayList<>(HANDLES.values());
+    }
+
+    public static ServerLevel level(MinecraftServer server, String dimensionId) {
+        Handle handle = HANDLES.get(dimensionId);
+        if (handle != null && handle.level().getServer() == server) {
+            return handle.level();
+        }
+        ResourceKey<Level> key = levelKey(dimensionId);
+        for (ServerLevel level : server.getAllLevels()) {
+            if (level.dimension().equals(key)) {
+                return level;
+            }
+        }
+        return null;
+    }
+
+    public static Engine engine(MinecraftServer server, String dimensionId) {
+        ServerLevel level = level(server, dimensionId);
+        if (level == null) {
+            return null;
+        }
+        if (!(level.getChunkSource().getGenerator() instanceof IrisModdedChunkGenerator generator)) {
+            return null;
+        }
+        return generator.commandEngine();
+    }
+
+    public static Handle create(MinecraftServer server, String dimensionId, String pack, String packDimensionKey, long seed) {
+        ModdedServerAccess serverAccess = requireAccess();
+        synchronized (LOCK) {
+            ResourceKey<Level> key = levelKey(dimensionId);
+            Handle existing = HANDLES.get(dimensionId);
+            if (existing != null && serverAccess.hasLevel(server, key)) {
+                existing.generator().repoint(pack, packDimensionKey, seed);
+                Handle refreshed = new Handle(dimensionId, pack, packDimensionKey, seed, existing.level(), existing.generator());
+                HANDLES.put(dimensionId, refreshed);
+                return refreshed;
+            }
+            if (serverAccess.hasLevel(server, key)) {
+                ServerLevel present = level(server, dimensionId);
+                if (present == null || !(present.getChunkSource().getGenerator() instanceof IrisModdedChunkGenerator generator)) {
+                    throw new IllegalStateException("Iris cannot inject dimension '" + dimensionId + "': a non-Iris level with that id is already loaded");
+                }
+                LOGGER.warn("Iris dimension '{}' is already present in the running server; reusing it", dimensionId);
+                generator.repoint(pack, packDimensionKey, seed);
+                Handle handle = new Handle(dimensionId, pack, packDimensionKey, seed, present, generator);
+                HANDLES.put(dimensionId, handle);
+                return handle;
+            }
+
+            try {
+                Handle handle = inject(server, serverAccess, dimensionId, key, pack, packDimensionKey, seed);
+                HANDLES.put(dimensionId, handle);
+                LOGGER.info("Iris injected runtime dimension '{}' (pack={} dim={} seed={})", dimensionId, pack, packDimensionKey, seed);
+                return handle;
+            } catch (Throwable e) {
+                LOGGER.error("Iris failed to inject runtime dimension '{}' (pack={} dim={} seed={})", dimensionId, pack, packDimensionKey, seed, e);
+                throw new IllegalStateException("Iris runtime dimension injection failed for " + dimensionId, e);
+            }
+        }
+    }
+
+    public static Handle createPersistent(MinecraftServer server, String dimensionId, String pack, String packDimensionKey, long seed) {
+        Handle handle = create(server, dimensionId, pack, packDimensionKey, seed);
+        ModdedDimensionRegistryStore.put(server, new ModdedDimensionRegistryStore.PersistentDimension(dimensionId, pack, packDimensionKey, seed));
+        return handle;
+    }
+
+    public static boolean removePersistent(MinecraftServer server, String dimensionId, boolean wipeStorage) {
+        boolean removed = remove(server, dimensionId, wipeStorage);
+        ModdedDimensionRegistryStore.remove(server, dimensionId);
+        return removed;
+    }
+
+    public static boolean remove(MinecraftServer server, String dimensionId, boolean wipeStorage) {
+        ModdedServerAccess serverAccess = requireAccess();
+        synchronized (LOCK) {
+            ResourceKey<Level> key = levelKey(dimensionId);
+            ServerLevel level = level(server, dimensionId);
+            if (level == null) {
+                HANDLES.remove(dimensionId);
+                if (wipeStorage) {
+                    ModdedDimensionStorage.wipe(server, key);
+                }
+                return false;
+            }
+            try {
+                evacuate(server, level);
+                if (level.getChunkSource().getGenerator() instanceof IrisModdedChunkGenerator generator) {
+                    generator.unbindEngine();
+                }
+                ModdedWorldEngines.evict(level);
+                level.save(null, true, false);
+                serverAccess.removeLevel(server, key);
+                level.close();
+                HANDLES.remove(dimensionId);
+                if (wipeStorage) {
+                    ModdedDimensionStorage.wipe(server, key);
+                }
+                LOGGER.info("Iris removed runtime dimension '{}'", dimensionId);
+                return true;
+            } catch (Throwable e) {
+                LOGGER.error("Iris failed to remove runtime dimension '{}'", dimensionId, e);
+                throw new IllegalStateException("Iris runtime dimension removal failed for " + dimensionId, e);
+            }
+        }
+    }
+
+    public static boolean teleport(ServerPlayer player, MinecraftServer server, String dimensionId, double x, double y, double z) {
+        ServerLevel level = level(server, dimensionId);
+        if (level == null) {
+            return false;
+        }
+        int blockX = (int) Math.floor(x);
+        int blockZ = (int) Math.floor(z);
+        ChunkPos chunkPos = new ChunkPos(blockX >> 4, blockZ >> 4);
+        if (level.getChunkSource().hasChunk(chunkPos.x(), chunkPos.z())) {
+            completeTeleport(player, level, x, y, z, blockX, blockZ);
+            return true;
+        }
+        UUID playerId = player.getUUID();
+        CompletableFuture
+                .supplyAsync(() -> level.getChunkSource().addTicketAndLoadWithRadius(TELEPORT_WARM_TICKET, chunkPos, 1), server)
+                .thenCompose((CompletableFuture<?> inner) -> inner)
+                .whenComplete((Object result, Throwable error) -> server.execute(() -> {
+                    level.getChunkSource().removeTicketWithRadius(TELEPORT_WARM_TICKET, chunkPos, 1);
+                    if (error != null) {
+                        LOGGER.warn("Iris chunk warm for teleport into '{}' at {},{} failed: {}", dimensionId, chunkPos.x(), chunkPos.z(), error.toString());
+                    }
+                    ServerPlayer target = server.getPlayerList().getPlayer(playerId);
+                    if (target == null) {
+                        return;
+                    }
+                    completeTeleport(target, level, x, y, z, blockX, blockZ);
+                }));
+        return true;
+    }
+
+    private static void completeTeleport(ServerPlayer player, ServerLevel level, double x, double y, double z, int blockX, int blockZ) {
+        double targetY = y;
+        if (y == Double.MIN_VALUE) {
+            targetY = level.getHeight(Heightmap.Types.MOTION_BLOCKING, blockX, blockZ);
+        }
+        player.teleportTo(level, x, targetY, z, Set.<Relative>of(), player.getYRot(), player.getXRot(), false);
+    }
+
+    private static Holder<DimensionType> resolveDimensionType(RegistryAccess registryAccess, String pack, String packDimensionKey) {
+        Registry<DimensionType> registry = registryAccess.lookupOrThrow(Registries.DIMENSION_TYPE);
+        IrisDimension dimension = loadPackDimension(pack, packDimensionKey);
+        if (dimension != null) {
+            String typeRef = ModdedForcedDatapack.dimensionTypeRef(dimension);
+            ResourceKey<DimensionType> typeKey = ResourceKey.create(Registries.DIMENSION_TYPE, Identifier.parse(typeRef));
+            Optional<Holder.Reference<DimensionType>> packType = registry.get(typeKey);
+            if (packType.isPresent()) {
+                return packType.get();
+            }
+            if (TYPE_FALLBACK_WARNINGS.add(typeRef)) {
+                LOGGER.warn("Iris dimension type {} (pack {} dim {}) is not registered yet; injecting with fallback heights. Restart the server so the forced datapack installs it.", typeRef, pack, packDimensionKey);
+            }
+        }
+        ResourceKey<DimensionType> studioPool = ResourceKey.create(Registries.DIMENSION_TYPE, Identifier.parse("irisworldgen:studio_pool"));
+        return registry.get(studioPool)
+                .map(reference -> (Holder<DimensionType>) reference)
+                .orElseGet(() -> registry.getOrThrow(BuiltinDimensionTypes.OVERWORLD));
+    }
+
+    private static IrisDimension loadPackDimension(String pack, String packDimensionKey) {
+        try {
+            File packFolder = ModdedWorldEngines.packFolder(pack);
+            if (!packFolder.isDirectory()) {
+                return null;
+            }
+            return IrisData.get(packFolder).getDimensionLoader().load(packDimensionKey);
+        } catch (Throwable e) {
+            LOGGER.warn("Iris could not load pack '{}' dimension '{}' for dimension type resolution: {}", pack, packDimensionKey, e.toString());
+            return null;
+        }
+    }
+
+    private static Handle inject(MinecraftServer server, ModdedServerAccess serverAccess, String dimensionId, ResourceKey<Level> key, String pack, String packDimensionKey, long seed) {
+        RegistryAccess registryAccess = server.registryAccess();
+        Holder<DimensionType> dimensionType = resolveDimensionType(registryAccess, pack, packDimensionKey);
+        Holder<Biome> plains = registryAccess.lookupOrThrow(Registries.BIOME).getOrThrow(Biomes.PLAINS);
+        FixedBiomeSource biomeSource = new FixedBiomeSource(plains);
+        String generatorRef = pack.equals(packDimensionKey) ? pack : pack + ":" + packDimensionKey;
+        IrisModdedChunkGenerator generator = new IrisModdedChunkGenerator(biomeSource, generatorRef);
+        generator.repoint(pack, packDimensionKey, seed);
+        LevelStem stem = new LevelStem(dimensionType, generator);
+
+        WorldData worldData = server.getWorldData();
+        ServerLevelData overworldData = worldData.overworldData();
+        DerivedLevelData derivedLevelData = new DerivedLevelData(worldData, overworldData);
+
+        Executor executor = serverAccess.levelExecutor(server);
+        LevelStorageSource.LevelStorageAccess storage = serverAccess.levelStorage(server);
+        long obfuscatedSeed = BiomeManager.obfuscateSeed(seed);
+
+        ServerLevel level = new ServerLevel(
+                server,
+                executor,
+                storage,
+                derivedLevelData,
+                key,
+                stem,
+                false,
+                obfuscatedSeed,
+                List.of(),
+                false);
+
+        serverAccess.putLevel(server, key, level);
+        server.getPlayerList().addWorldborderListener(level);
+        return new Handle(dimensionId, pack, packDimensionKey, seed, level, generator);
+    }
+
+    public static int evacuate(MinecraftServer server, ServerLevel from) {
+        ServerLevel fallback = server.overworld();
+        if (fallback == from) {
+            return 0;
+        }
+        BlockPos spawn = fallback.getRespawnData().pos();
+        int spawnY = fallback.getHeight(Heightmap.Types.MOTION_BLOCKING, spawn.getX(), spawn.getZ());
+        List<ServerPlayer> players = new ArrayList<>(from.players());
+        for (ServerPlayer player : players) {
+            player.teleportTo(fallback, spawn.getX() + 0.5D, spawnY, spawn.getZ() + 0.5D, Set.<Relative>of(), player.getYRot(), player.getXRot(), false);
+        }
+        return players.size();
+    }
+
+    private static ResourceKey<Level> levelKey(String dimensionId) {
+        Identifier identifier = Identifier.parse(dimensionId);
+        return ResourceKey.create(Registries.DIMENSION, identifier);
+    }
+
+    private static ModdedServerAccess requireAccess() {
+        ModdedServerAccess bound = access;
+        if (bound == null) {
+            throw new IllegalStateException("Iris modded server access is not bound; the loader bootstrap must bind ModdedServerAccess before runtime dimension injection");
+        }
+        return bound;
+    }
+
+    public record Handle(String dimensionId, String pack, String packDimensionKey, long seed, ServerLevel level, IrisModdedChunkGenerator generator) {
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedDimensionRegistryStore.java

@@ -0,0 +1,132 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import art.arcane.volmlib.util.json.JSONArray;
+import art.arcane.volmlib.util.json.JSONObject;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.world.level.storage.LevelResource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+public final class ModdedDimensionRegistryStore {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+    private static final String FILE_NAME = "iris-dimensions.json";
+
+    private ModdedDimensionRegistryStore() {
+    }
+
+    public static List<PersistentDimension> load(MinecraftServer server) {
+        Path file = storeFile(server);
+        if (!Files.isRegularFile(file)) {
+            return new ArrayList<>();
+        }
+        try {
+            JSONObject root = new JSONObject(Files.readString(file, StandardCharsets.UTF_8));
+            JSONArray entries = root.optJSONArray("dimensions");
+            if (entries == null) {
+                return new ArrayList<>();
+            }
+            Map<String, PersistentDimension> deduplicated = new LinkedHashMap<>();
+            for (int index = 0; index < entries.length(); index++) {
+                JSONObject entry = entries.getJSONObject(index);
+                String id = entry.optString("id", null);
+                if (id == null) {
+                    continue;
+                }
+                String pack = entry.optString("pack", null);
+                String dimension = entry.optString("dimension", null);
+                if (pack == null || dimension == null) {
+                    LOGGER.error("Iris registry entry '{}' in {} has no pack/dimension fields; skipping it. Re-create the world with /iris world enable", id, file);
+                    continue;
+                }
+                if (!entry.has("seed")) {
+                    LOGGER.warn("Iris registry entry '{}' in {} has no seed; skipping it. Re-create the world with /iris world enable", id, file);
+                    continue;
+                }
+                deduplicated.put(id, new PersistentDimension(id, pack, dimension, entry.getLong("seed")));
+            }
+            return new ArrayList<>(deduplicated.values());
+        } catch (RuntimeException | IOException e) {
+            LOGGER.error("Iris persistent dimension registry at {} is invalid; ignoring it", file, e);
+            return new ArrayList<>();
+        }
+    }
+
+    public static synchronized void put(MinecraftServer server, PersistentDimension dimension) {
+        Map<String, PersistentDimension> current = index(load(server));
+        current.put(dimension.id(), dimension);
+        write(server, new ArrayList<>(current.values()));
+    }
+
+    public static synchronized void remove(MinecraftServer server, String id) {
+        Map<String, PersistentDimension> current = index(load(server));
+        if (current.remove(id) != null) {
+            write(server, new ArrayList<>(current.values()));
+        }
+    }
+
+    private static Map<String, PersistentDimension> index(List<PersistentDimension> dimensions) {
+        Map<String, PersistentDimension> map = new LinkedHashMap<>();
+        for (PersistentDimension dimension : dimensions) {
+            map.put(dimension.id(), dimension);
+        }
+        return map;
+    }
+
+    private static void write(MinecraftServer server, List<PersistentDimension> dimensions) {
+        Path file = storeFile(server);
+        JSONArray entries = new JSONArray();
+        for (PersistentDimension dimension : dimensions) {
+            JSONObject entry = new JSONObject();
+            entry.put("id", dimension.id());
+            entry.put("pack", dimension.pack());
+            entry.put("dimension", dimension.dimension());
+            entry.put("seed", dimension.seed());
+            entries.put(entry);
+        }
+        JSONObject root = new JSONObject();
+        root.put("dimensions", entries);
+        try {
+            Files.createDirectories(file.getParent());
+            Path temp = file.resolveSibling(FILE_NAME + ".tmp");
+            Files.writeString(temp, root.toString(2), StandardCharsets.UTF_8);
+            Files.move(temp, file, StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.ATOMIC_MOVE);
+        } catch (IOException e) {
+            LOGGER.error("Iris failed to write persistent dimension registry at {}", file, e);
+        }
+    }
+
+    private static Path storeFile(MinecraftServer server) {
+        return server.getWorldPath(LevelResource.ROOT).resolve("iris").resolve(FILE_NAME);
+    }
+
+    public record PersistentDimension(String id, String pack, String dimension, long seed) {
+    }
+}

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedDimensionStorage.java

@@ -0,0 +1,68 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package art.arcane.iris.modded;
+
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.dimension.DimensionType;
+import net.minecraft.world.level.storage.LevelResource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Comparator;
+import java.util.List;
+import java.util.stream.Stream;
+
+public final class ModdedDimensionStorage {
+    private static final Logger LOGGER = LoggerFactory.getLogger("Iris");
+    private static final List<String> CHUNK_DATA_FOLDERS = List.of("region", "entities", "poi", "mantle");
+
+    private ModdedDimensionStorage() {
+    }
+
+    public static File storageFolder(MinecraftServer server, ResourceKey<Level> dimension) {
+        return DimensionType.getStorageFolder(dimension, server.getWorldPath(LevelResource.ROOT)).toFile();
+    }
+
+    public static void wipe(MinecraftServer server, ResourceKey<Level> dimension) {
+        File storageFolder = storageFolder(server, dimension);
+        for (String folder : CHUNK_DATA_FOLDERS) {
+            deleteRecursively(new File(storageFolder, folder).toPath());
+        }
+        LOGGER.info("Iris wiped dimension storage at {}", storageFolder.getAbsolutePath());
+    }
+
+    private static void deleteRecursively(Path root) {
+        if (!Files.exists(root)) {
+            return;
+        }
+        try (Stream<Path> walk = Files.walk(root)) {
+            for (Path path : walk.sorted(Comparator.reverseOrder()).toList()) {
+                Files.deleteIfExists(path);
+            }
+        } catch (IOException e) {
+            LOGGER.error("Iris failed to wipe dimension storage at {}", root, e);
+        }
+    }
+}