Worlds

Added

• Support for Minecraft 26.3 Pre-Release 3 (Fabric API 0.160.1+26.3).
• ServerLevelProvider.createLevelStem, a recovery hook called only when a world's stored generator could not be read. A provider whose generation is determined by the world id and seed can rebuild one there instead of the world being skipped. mc-worlds:default does not implement it.

Fixed

• A world whose stored generator cannot be decoded no longer loses it. The undecodable level_stem is kept as-is and written back unchanged, so the world recovers once whatever supplied that generator is present again. Such a world is skipped with an error in the log if its provider cannot rebuild a generator, instead of failing server startup and MinecraftServer.getLevel.