Tracked generated content ownership

- Generated furniture keeps ownership tokens for targeted removal
- Native writes invalidate pending custom content and tile records
- Regeneration and chunk updates remove invalidated content on owning threads
- Provider callbacks return ownership tokens across server platforms
- Regression fixtures cover terrain replacement and restart cleanup

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

@@ -57,6 +57,8 @@ import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeModdedChunkGenera
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeGeneratorContext;
 
 import art.arcane.volmlib.nativelib.terrain.NativeWorld;
+import art.arcane.volmlib.util.mantle.runtime.Mantle;
+import art.arcane.volmlib.util.matter.Matter;
 
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeModdedStructureStage;
 import art.arcane.iris.world.safeguard.GenerationRefusalNotice;
@@ -829,12 +831,12 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
         importedFeatures.invalidate();
     }
 
-    public void updateRegeneratedChunk(int chunkX, int chunkZ) {
+    public void updateRegeneratedChunk(Mantle<Matter> mantle, int chunkX, int chunkZ) {
         ModdedChunkUpdateService service = ModdedEngineBootstrap.services().service(ModdedChunkUpdateService.class);
         if (service == null) {
             throw new IllegalStateException("Iris chunk update service is unavailable during regeneration");
         }
-        service.updateRegeneratedChunk(engine(), boundLevel(), chunkX, chunkZ);
+        service.updateRegeneratedChunk(engine(), boundLevel(), mantle, chunkX, chunkZ);
     }
 
     public NativeBiomeResolver regenBiomeResolver() {

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

@@ -19,6 +19,8 @@
 package art.arcane.iris.modded.api;
 
 import art.arcane.iris.generation.runtime.Engine;
+import art.arcane.iris.generation.mantle.CustomBlockOwnership;
+import art.arcane.iris.integration.Identifier;
 import art.arcane.iris.modded.ModdedIrisLog;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.ModdedBlockState;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeBlockPlacement;
@@ -297,11 +299,11 @@ public final class ModdedCustomContentRegistry {
      * consulted for that position. An unparseable key or no matching provider is logged and skipped. Called on the
      * server thread with the chunk loaded.
      */
-    public static void processBlockPlacement(Engine engine, String key, Supplier<NativeBlockPlacement> placement) {
+    public static CustomBlockOwnership.Entry processBlockPlacement(Engine engine, String key, Supplier<NativeBlockPlacement> placement) {
         String base = parseIdentifier(key);
         if (base == null) {
             ModdedIrisLog.warn("Iris deferred custom block placement rejected invalid id {}", key);
-            return;
+            return null;
         }
         Map<String, String> state = parseState(key);
         for (ModdedDataProvider provider : PROVIDERS) {
@@ -309,14 +311,33 @@ public final class ModdedCustomContentRegistry {
                 continue;
             }
             try {
-                provider.processBlockPlacement(new ModdedBlockPlacementContext(
+                String token = provider.processBlockPlacement(new ModdedBlockPlacementContext(
                         engine, placement.get(), base, state));
+                int properties = key.indexOf('[');
+                String qualifiedKey = base.replace(':', '/') + (properties < 0 ? "" : key.substring(properties));
+                return token == null ? null : new CustomBlockOwnership.Entry(
+                        new Identifier(provider.modId(), qualifiedKey), token, false);
             } catch (Throwable error) {
                 ModdedIrisLog.error("Iris custom content provider '{}' failed post-placement for {}", provider.modId(), key, error);
             }
-            return;
+            return null;
         }
         ModdedIrisLog.warn("Iris deferred custom block placement has no provider for {}", key);
+        return null;
+    }
+
+    public static boolean removeGenerated(Engine engine, CustomBlockOwnership.Entry entry,
+                                          Supplier<NativeBlockPlacement> placement) {
+        for (ModdedDataProvider provider : PROVIDERS) {
+            if (provider.modId().equals(entry.identifier().namespace()) && provider.isReady()) {
+                String storedKey = entry.identifier().key();
+                int separator = storedKey.indexOf('/');
+                String key = storedKey.substring(0, separator) + ":" + storedKey.substring(separator + 1);
+                return provider.removeGenerated(new ModdedBlockPlacementContext(
+                        engine, placement.get(), parseIdentifier(key), parseState(key)), entry.token());
+            }
+        }
+        return false;
     }
 
     /**

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

@@ -95,7 +95,12 @@ public interface ModdedDataProvider {
      * Called on the server thread, once per deferred position, by the first provider that claims the identifier -
      * later providers are not consulted for that position. Only fires for states returned as deferred.
      */
-    default void processBlockPlacement(ModdedBlockPlacementContext context) {
+    default String processBlockPlacement(ModdedBlockPlacementContext context) {
+        return null;
+    }
+
+    default boolean removeGenerated(ModdedBlockPlacementContext context, String token) {
+        return false;
     }
 
     /**

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

@@ -22,6 +22,7 @@ import art.arcane.iris.modded.ModdedIrisLog;
 import art.arcane.iris.world.WorldMaintenance;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.generation.mantle.EngineMantle;
+import art.arcane.iris.generation.mantle.DeferredPlacementRecords;
 import art.arcane.iris.modded.IrisModdedChunkGenerator;
 import art.arcane.iris.modded.ModdedBlockBuffer;
 import art.arcane.iris.spi.IrisPlatforms;
@@ -36,6 +37,9 @@ import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeCommandSource;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeChunkRegeneration;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeProtocolPlayer;
 import art.arcane.volmlib.nativelib.terrain.NativeWorld;
+import art.arcane.volmlib.util.mantle.runtime.Mantle;
+import art.arcane.volmlib.util.mantle.runtime.MantleChunk;
+import art.arcane.volmlib.util.matter.Matter;
 
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
@@ -110,10 +114,12 @@ public final class ModdedRegen {
 
     private void resetMantleMargin() {
         EngineMantle engineMantle = engine.getMantle();
+        Mantle<Matter> mantle = engineMantle.getMantle();
         int margin = radius + Math.max(engineMantle.getRadius(), engineMantle.getRealRadius()) + 1;
         for (int dx = -margin; dx <= margin; dx++) {
             for (int dz = -margin; dz <= margin; dz++) {
-                engineMantle.getMantle().deleteChunk(centerX + dx, centerZ + dz);
+                DeferredPlacementRecords.resetMantleChunk(mantle, centerX + dx, centerZ + dz,
+                        Math.abs(dx) <= radius && Math.abs(dz) <= radius);
             }
         }
     }
@@ -199,10 +205,21 @@ public final class ModdedRegen {
     }
 
     private void apply(int chunkX, int chunkZ, ModdedBlockBuffer blocks, Hunk<NativeBiome> biomes) {
+        Mantle<Matter> mantle = engine.getMantle().getMantle();
         regeneration.apply(new NativeChunkRegeneration.Replacement(chunkX, chunkZ,
                         engine.getMinHeight(), engine.getMaxHeight() - engine.getMinHeight(),
                         blocks::rawOrNull, generator.regenBiomeResolver()),
-                () -> generator.updateRegeneratedChunk(chunkX, chunkZ));
+                () -> completeReplacement(mantle, chunkX, chunkZ));
+    }
+
+    private void completeReplacement(Mantle<Matter> mantle, int chunkX, int chunkZ) {
+        MantleChunk<Matter> records = mantle.useChunk(chunkX, chunkZ);
+        try {
+            DeferredPlacementRecords.invalidateCustomBlockOwnership(records);
+        } finally {
+            records.release();
+        }
+        generator.updateRegeneratedChunk(mantle, chunkX, chunkZ);
     }
 
     private void ok(String message) {

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

@@ -28,6 +28,8 @@ import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeBlockProperties;
 import art.arcane.iris.configuration.IrisSettings;
 import art.arcane.iris.studio.view.PregeneratorJob;
 import art.arcane.iris.integration.Identifier;
+import art.arcane.iris.generation.mantle.CustomBlockOwnership;
+import art.arcane.iris.generation.mantle.DeferredPlacementRecords;
 import art.arcane.iris.generation.cache.Cache;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.generation.block.TileData;
@@ -166,8 +168,8 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
                 updatePassChunk(engine, level, (int) chunkKey, (int) (chunkKey >> 32)));
     }
 
-    public void updateRegeneratedChunk(Engine engine, NativeWorld level, int chunkX, int chunkZ) {
-        updateChunk(engine, level, chunkX, chunkZ, false);
+    public void updateRegeneratedChunk(Engine engine, NativeWorld level, Mantle<Matter> mantle, int chunkX, int chunkZ) {
+        updateChunk(engine, level, mantle, chunkX, chunkZ, false);
     }
 
     /**
@@ -176,7 +178,7 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
      */
     private void updatePassChunk(Engine engine, NativeWorld level, int chunkX, int chunkZ) {
         try {
-            updateChunk(engine, level, chunkX, chunkZ, true);
+            updateChunk(engine, level, engine.getMantle().getMantle(), chunkX, chunkZ, true);
         } catch (Throwable failure) {
             if (engine.isClosed() || engine.getMantle().getMantle().isClosed()) {
                 throw failure;
@@ -188,7 +190,8 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
         }
     }
 
-    private void updateChunk(Engine engine, NativeWorld level, int chunkX, int chunkZ, boolean requireNeighbors) {
+    private void updateChunk(Engine engine, NativeWorld level, Mantle<Matter> mantle,
+                             int chunkX, int chunkZ, boolean requireNeighbors) {
         if (requireNeighbors) {
             for (int x = -1; x <= 1; x++) {
                 for (int z = -1; z <= 1; z++) {
@@ -199,11 +202,11 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
             }
         }
 
-        Mantle<Matter> mantle = engine.getMantle().getMantle();
         if (!mantle.isChunkLoaded(chunkX, chunkZ)) {
             warmupMantleChunk(mantle, chunkX, chunkZ);
             return;
         }
+        DeferredPlacementRecords.removeInvalidated(engine, mantle, chunkX, chunkZ);
         if (mantle.hasFlag(chunkX, chunkZ, MantleFlag.ETCHED)) {
             return;
         }
@@ -229,14 +232,19 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
         int baseX = chunkX << 4;
         int baseZ = chunkZ << 4;
         int minHeight = engine.getWorld().minHeight();
-        materializeDeferredSlice(chunk, TileWrapper.class, () ->
-                chunk.iterate(TileWrapper.class, (Integer x, Integer yf, Integer z, TileWrapper v) -> {
-                    int y = yf + minHeight;
-                    if (y < level.minHeight() || y >= level.maxHeight() - 1) {
-                        return;
-                    }
-                    applyTile(level, baseX + (x & 15), y, baseZ + (z & 15), v.getData());
-                }));
+        materializeDeferredSlice(chunk, TileWrapper.class, () -> {
+            for (DeferredPlacementRecords.Pending<TileWrapper> record : DeferredPlacementRecords.snapshot(chunk, TileWrapper.class)) {
+                if (!DeferredPlacementRecords.isPending(chunk, TileWrapper.class, record)) {
+                    continue;
+                }
+                NativeBlockPoint position = record.position();
+                int y = position.y() + minHeight;
+                if (y < level.minHeight() || y >= level.maxHeight() - 1) {
+                    continue;
+                }
+                applyTile(level, baseX + (position.x() & 15), y, baseZ + (position.z() & 15), record.value().getData());
+            }
+        });
     }
 
     private void runCustomPass(Engine engine, NativeWorld level, int chunkX, int chunkZ, MantleChunk<Matter> chunk) {
@@ -244,22 +252,30 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
         int baseZ = chunkZ << 4;
         int minHeight = engine.getWorld().minHeight();
         StaleCarriers stale = new StaleCarriers();
-        materializeDeferredSlice(chunk, Identifier.class, () ->
-                chunk.iterate(Identifier.class, (Integer x, Integer yf, Integer z, Identifier identifier) -> {
-                    int y = yf + minHeight;
-                    if (y < level.minHeight() || y >= level.maxHeight() - 1) {
-                        return;
-                    }
-                    int blockX = baseX + (x & 15);
-                    int blockZ = baseZ + (z & 15);
-                    String key = identifier.toString();
-                    if (stale.carrierReplaced(key, level.getBlock(blockX, y, blockZ))) {
-                        return;
-                    }
-                    NativeBlockPoint position = new NativeBlockPoint(blockX, y, blockZ);
-                    ModdedCustomContentRegistry.processBlockPlacement(engine, key,
-                            () -> NativeWorldMaintenance.placement(level, position));
-                }));
+        materializeDeferredSlice(chunk, Identifier.class, () -> {
+            for (DeferredPlacementRecords.Pending<Identifier> record : DeferredPlacementRecords.snapshot(chunk, Identifier.class)) {
+                if (!DeferredPlacementRecords.isPending(chunk, Identifier.class, record)) {
+                    continue;
+                }
+                NativeBlockPoint local = record.position();
+                int y = local.y() + minHeight;
+                if (y < level.minHeight() || y >= level.maxHeight() - 1) {
+                    continue;
+                }
+                int blockX = baseX + (local.x() & 15);
+                int blockZ = baseZ + (local.z() & 15);
+                String key = record.value().toString();
+                if (stale.carrierReplaced(key, level.getBlock(blockX, y, blockZ))) {
+                    continue;
+                }
+                NativeBlockPoint position = new NativeBlockPoint(blockX, y, blockZ);
+                CustomBlockOwnership.Entry ownership = ModdedCustomContentRegistry.processBlockPlacement(engine, key,
+                        () -> NativeWorldMaintenance.placement(level, position));
+                if (ownership != null) {
+                    DeferredPlacementRecords.remember(engine, chunk, local, ownership);
+                }
+            }
+        });
         stale.report(level.name(), chunkX, chunkZ);
     }
 
@@ -411,7 +427,8 @@ public final class ModdedChunkUpdateService implements ModdedTickableService {
                 carrier = carrierKey(key);
                 carriers.put(key, carrier);
             }
-            if (carrier.equals(UNCHECKED) || carrier.equals(IrisProceduralBlocks.materialKey(live))) {
+            if (carrier.equals(UNCHECKED) || carrier.equals(IrisProceduralBlocks.materialKey(live))
+                    || ((carrier.equals("minecraft:fire") || carrier.equals("minecraft:soul_fire")) && live.isAir())) {
                 return false;
             }
             skipped++;

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

@@ -28,6 +28,10 @@ import art.arcane.iris.modded.ModdedSavedTerrainCapture;
 
 import java.util.concurrent.CompletableFuture;
 import art.arcane.iris.generation.runtime.EnginePlatformHooks;
+import art.arcane.iris.generation.mantle.CustomBlockOwnership;
+import art.arcane.iris.modded.api.ModdedCustomContentRegistry;
+import art.arcane.volmlib.nativelib.terrain.NativeBlockPoint;
+import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeWorldMaintenance;
 import art.arcane.volmlib.nativelib.terrain.structure.NativeStructureVolume;
 import art.arcane.iris.generation.terrain.IrisDimension;
 import art.arcane.iris.generation.terrain.IrisDimensionRuntimeContract;
@@ -72,6 +76,12 @@ public final class ModdedStudioHotloadService implements ModdedTickableService,
     private volatile ExecutorService executor;
     private long lastPollAt;
 
+    @Override
+    public boolean removeCustomBlock(Engine engine, NativeBlockPoint position, CustomBlockOwnership.Entry entry) {
+        return ModdedCustomContentRegistry.removeGenerated(engine, entry,
+                () -> NativeWorldMaintenance.placement(engine.getWorld().platformWorld(), position));
+    }
+
     @Override
     public CompletableFuture<Void> flushSavedTerrainCapture(Engine engine) {
         return ModdedSavedTerrainCapture.flush(engine);