diff --git a/changelogs/4.0-snapshot.md b/changelogs/4.0-snapshot.md
index 2aceb99ea..7e1546bf3 100644
--- a/changelogs/4.0-snapshot.md
+++ b/changelogs/4.0-snapshot.md
@@ -761,11 +761,46 @@ This version features substantial changes to the network system, improving coher
 - The following API methods have been added:
   - `World->registerChunkListener()`
   - `World->unregisterChunkListener()`
+  - `Chunk->isDirty()` (replacement for `Chunk->hasChanged()`)
+  - `Chunk->getDirtyFlag()` (more granular component-based chunk dirty-flagging, used to avoid saving unmodified parts of the chunk)
+  - `Chunk->setDirty()`
+  - `Chunk->setDirtyFlag()`
 - The following API methods have been removed:
   - `ChunkLoader->getLoaderId()` (now object ID is used)
   - `ChunkLoader->isLoaderActive()`
   - `ChunkLoader->getPosition()`
   - `ChunkLoader->getLevel()`
+  - `Chunk->fastSerialize()` (use `FastChunkSerializer::serialize()` instead)
+  - `Chunk->getBlockData()`
+  - `Chunk->getBlockDataColumn()`
+  - `Chunk->getBlockId()`
+  - `Chunk->getBlockIdColumn()`
+  - `Chunk->getBlockLight()`
+  - `Chunk->getBlockLightColumn()`
+  - `Chunk->getBlockSkyLight()`
+  - `Chunk->getBlockSkyLightColumn()`
+  - `Chunk->getMaxY()`
+  - `Chunk->getSubChunkSendCount()` (this was specialized for protocol usage)
+  - `Chunk->getX()`
+  - `Chunk->getZ()`
+  - `Chunk->hasChanged()` (use `Chunk->isDirty()` or `Chunk->getDirtyFlag()` instead)
+  - `Chunk->isGenerated()`
+  - `Chunk->networkSerialize()` (see `ChunkSerializer` in the `network\mcpe\serializer` package)
+  - `Chunk->populateSkyLight()` (use `SkyLightUpdate->recalculateChunk()` instead)
+  - `Chunk->recalculateHeightMap()` (moved to `SkyLightUpdate`)
+  - `Chunk->recalculateHeightMapColumn()` (moved to `SkyLightUpdate`)
+  - `Chunk->setAllBlockLight()`
+  - `Chunk->setAllBlockSkyLight()`
+  - `Chunk->setBlock()`
+  - `Chunk->setBlockData()`
+  - `Chunk->setBlockId()`
+  - `Chunk->setBlockLight()`
+  - `Chunk->setBlockSkyLight()`
+  - `Chunk->setChanged()` (use `Chunk->setDirty()` or `Chunk->setDirtyFlag()` instead)
+  - `Chunk->setGenerated()`
+  - `Chunk->setX()`
+  - `Chunk->setZ()`
+  - `Chunk::fastDeserialize()` (use `FastChunkSerializer::deserialize()` instead)
   - `World->isFullBlock()`
   - `World->getFullBlock()`
   - `World->getBlockIdAt()`
@@ -801,9 +836,12 @@ This version features substantial changes to the network system, improving coher
   - `World->addRandomTickedBlock()` now accepts `Block` instead of `int, int`.
   - `World->removeRandomTickedBlock()` now accepts `Block` instead of `int, int`.
   - `World->setBlock()` has had the `$direct` parameter removed.
-  - `World->loadChunk()` now returns `?Chunk`, and the `$create` parameter is mandatory.
+  - `World->loadChunk()` now returns `?Chunk`, and the `$create` parameter has been removed.
   - `World->getChunk()` no longer accepts a `$create` parameter.
   - `World->updateAllLight()` now accepts `int, int, int` instead of `Vector3`.
+  - `Chunk->__construct()` now has the signature `array<int, SubChunk> $subChunks, ?list<CompoundTag> $entities, ?list<CompoundTag> $tiles, ?BiomeArray $biomeArray, ?HeightArray $heightArray`.
+  - `Chunk->getSubChunk()` now returns `SubChunk` instead of `SubChunkInterface|null` (and throws `InvalidArgumentException` on out-of-bounds coordinates).
+  - `Chunk->setSubChunk()` no longer accepts `SubChunkInterface`, and the `$allowEmpty` parameter has been removed.
 - The following API methods have been renamed / moved:
   - `Level->getCollisionCubes()` -> `World->getCollisionBoxes()`
   - `World->getName()` -> `World->getDisplayName()`
@@ -812,9 +850,10 @@ This version features substantial changes to the network system, improving coher
   - The following methods now throw `WorldException` when targeting ungenerated terrain:
     - `World->getSafeSpawn()` (previously it just silently returned the input position)
     - `World->getHighestBlockAt()` (previously it returned -1)
-- Extracted a unit `pocketmine\world\format\io\FastChunkSerializer` from `Chunk`:
-  - `Chunk->fastDeserialize()` -> `FastChunkSerializer::deserialize()`
-  - `Chunk->fastSerialize()` -> `FastChunkSerializer::serialize()`
+  - `World->loadChunk()` no longer creates an empty chunk when the target chunk doesn't exist on disk.
+  - `World->setChunk()` now fires `ChunkLoadEvent` and `ChunkListener->onChunkLoaded()` when replacing a chunk that didn't previously exist.
+  - `World->useBreakOn()` now returns `false` when the target position is in an ungenerated or unloaded chunk (or chunk locked for generation).
+  - `World->useItemOn()` now returns `false` when the target position is in an ungenerated or unloaded chunk (or chunk locked for generation).
 - A `ChunkListener` interface has been extracted from `ChunkLoader`. The following methods have been moved:
   - `ChunkLoader->onBlockChanged()` -> `ChunkListener->onBlockChanged()`
   - `ChunkLoader->onChunkChanged()` -> `ChunkListener->onChunkChanged()`