fabric-121-api-pitfalls

Fabric 1.21 updates slot constructors for furnace fuel and output slots, requiring new parameters for property delegates and inventory contexts. You must use the updated slot constructor signatures and property delegate patterns to fix screen handler issues.

Fabric 1.21 brewing recipe APIs changed from static access to instance-based brewing access. You must update your brewing recipe registration and potion handling code to use the new instance-based brewing API methods.

Yes, Fabric 1.21 requires registry-aware component and sound handling for jukebox disc playback and enchantments. You must use registry access patterns to safely resolve disc items and enchantment components during gameplay logic.

Incorrect data persistence in Fabric 1.21 mods is caused by missing registry lookup context in NBT methods. Using updated Yarn-safe patterns for registry-aware NBT serialization ensures block entity and inventory data saves correctly.

Yes, this Skill addresses 1.21 registry and gameplay API changes for entity damage detection. It provides the correct Yarn-safe patterns needed to resolve damage detection errors alongside fuels, potions, and enchantment updates.