Expanded terrain generation tooling

- Standalone Minecraft 26.3 generation uses native registries, biome planning and structure planning with bounded concurrency
- Offline export publishes fresh TERRAIN checkpoints for native server completion
- Checkpoints retain mantle data, immutable generation history and captured server configuration
- Output publication uses staged directories, durability checks and atomic moves
- Offline distribution tasks provide an installed launcher and reusable native fixtures
- Dimension settings control terrain, biome-bound and cave-density sampling with unchanged defaults
- Pack validation and schemas enforce the supported sampling intervals
- Biome layer caches isolate data, engine and seed identities
- Floating biome palettes keep stable thickness patterns across generation orders
- Hydrology batches terrain samples within the owning generation runtime
- Hydrology planners share bounded basis caches and reuse raster geometry and distance samples
- Demand planning admits new tiles as active plans finish
- Volumetric height queries avoid unnecessary density evaluation and bound cached anchors
- Cave generation reuses chunk-scoped inputs and semantic capture
- Object replay indexes mutations by destination and reuses resolved records
- Source-plan caches coordinate concurrent builds and reduce overlay allocation
- Prerequisite carving reads preserve the underlying hydrology before object placement
- Tree material decoding preserves stored native block identities
- Engine shutdown drains generation outside the lifecycle lock and coordinates runtime retirement
- Pregeneration sizes temporary worker boosts from processor and heap capacity
- Pregeneration restores native worker counts after drain and failure paths
- Native structure queries retain per-origin coordination without broad window locks
- Saved biome writes drain pending batches under their write stripe
- Boundary column lookups avoid repeated voxel decoding
- Modded registry consumers use explicit VolmLib providers and version-specific native source overlays
- Regression tests cover generation parity, cache isolation, concurrency, shutdown, persistence and offline checkpoints

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

@@ -391,7 +391,10 @@ public final class ModdedEngineBootstrap {
                 BlockDataMergeSupport.StateMerger previousMerger = BlockDataMergeSupport.bindPlatformMerger(new NativeStateMerger(ModdedBlockResolution.BLOCKS)::merge);
                 rollback.add(() -> BlockDataMergeSupport.restorePlatformMerger(previousMerger));
 
-                NativeTileReader nativeTileReader = new NativeTileReader(boundLoader::currentServer);
+                NativeTileReader nativeTileReader = new NativeTileReader(() -> {
+                    NativeModdedServer server = boundLoader.currentServer();
+                    return server == null ? null : server.registryAccess();
+                });
                 TileData.TileReader previousTileReader = TileData.bindPlatformReader(in -> ModdedTileData.wrap(nativeTileReader.read(in)));
                 rollback.add(() -> TileData.restorePlatformReader(previousTileReader));
 

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

@@ -38,6 +38,8 @@ import art.arcane.iris.spi.PlatformScheduler;
 import art.arcane.iris.spi.PlatformStructureHooks;
 import art.arcane.volmlib.nativelib.terrain.NativeWorld;
 
+import net.minecraft.core.HolderLookup;
+
 import java.io.File;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -61,13 +63,25 @@ public final class ModdedPlatform implements IrisPlatform {
     public ModdedPlatform(NativeModdedLoader loader) {
         this.loader = loader;
         this.registries = new ModdedRegistries(
-                new NativeRegistryAccess(ModdedEngineBootstrap::currentServer, ModdedRegistries::warnNotReady),
+                new NativeRegistryAccess(new NativeRegistryAccess.Configuration(
+                        ModdedPlatform::nativeRegistries, ModdedPlatform::reloadableRegistries,
+                        ModdedRegistries::warnNotReady)),
                 ModdedPlatform::generationRegistry);
         this.scheduler = new ModdedScheduler();
         this.structureHooks = new ModdedStructureHooks(ModdedEngineBootstrap::currentServer);
         this.biomeWriter = new ModdedBiomeWriter(new NativeBiomeRegistry(ModdedEngineBootstrap::currentServer, "minecraft:plains"));
     }
 
+    private static HolderLookup.Provider nativeRegistries() {
+        NativeModdedServer server = ModdedEngineBootstrap.currentServer();
+        return server == null ? null : server.registryAccess();
+    }
+
+    private static HolderLookup.Provider reloadableRegistries() {
+        NativeModdedServer server = ModdedEngineBootstrap.currentServer();
+        return server == null ? null : server.reloadableRegistries();
+    }
+
     public static void errorSink(Consumer<Throwable> sink) {
         ERROR_SINK = sink;
     }

adapters/modded-common/src/test/java/art/arcane/iris/modded/NativeRegistryAccessTest.java

@@ -25,7 +25,7 @@ public class NativeRegistryAccessTest {
 
     @Test
     public void statePropertiesPreserveTypesDefaultsAndSharedGroups() {
-        NativeRegistryAccess access = new NativeRegistryAccess(() -> null, message -> {});
+        NativeRegistryAccess access = new NativeRegistryAccess(new NativeRegistryAccess.Configuration(() -> null, () -> null, message -> {}));
         Map<String, List<NativeBlockProperty>> properties = access.blockStateProperties();
 
         assertSame(properties.get("minecraft:stone"), properties.get("minecraft:dirt"));
@@ -41,7 +41,7 @@ public class NativeRegistryAccessTest {
     @Test
     public void staticRegistriesResolveWithoutAnActiveServerAndDynamicReadsStayEmpty() {
         List<String> warnings = new ArrayList<>();
-        NativeRegistryAccess access = new NativeRegistryAccess(() -> null, warnings::add);
+        NativeRegistryAccess access = new NativeRegistryAccess(new NativeRegistryAccess.Configuration(() -> null, () -> null, warnings::add));
 
         assertEquals("minecraft:diamond_sword", access.item("DIAMOND SWORD").key());
         assertEquals("creature", access.entity("minecraft:cow").spawnCategory());