Port to NeoForge 1.21.1#370
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- Migrate build system from ForgeGradle to NeoGradle with NeoForge 21.1.228 - Update all registry calls to NeoForge DeferredRegister API - Replace Forge-specific codec/network classes with NeoForge equivalents - Fix RecipeRegistry: assign RecipeHolder ID via peek() before sorting (NPE fix) - Fix ProbabilityGroup: filter empty ItemStacks before network serialization (EncoderException on client join with minecraft:air dissolver outputs) - Migrate 5749 recipe files to 1.21.1 data format (singular recipe/ path) - Update AbstractProcessingRecipe: add setId() to support RecipeHolder pattern - Remove deprecated IForgeRegistry usages, migrate to vanilla registries - Fix all recipe serializers to use new Codec/StreamCodec pattern - Resolve packet handler migration to NeoForge SimpleChannel equivalent - Port JEI integration to JEI 19.x API for 1.21.1 - Update item/block renderer hooks to new Minecraft 1.21 client API
This was referenced May 12, 2026
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Port to NeoForge 1.21.1
This pull request ports Alchemistry to NeoForge 21.1.228 for Minecraft 1.21.1, updating the codebase from its last Forge 1.20.1 release.
Key Changes
Build system
Registry & API migration
Recipe system (critical fixes)
JEI integration
General
Testing
Port authored by Alex Zero (unh0lyalexzero)