WyWF

Fixed

• Structure search parity (all placement types): rewrote VanillaStructureChecker to no longer rely on ChunkGeneratorStructureState.isStructureChunk(state, …), which both failed to compile and threw UnsupportedOperationException at construction (offline / test RegistryAccess lacks the datapack has_structure biome tags). It now re-implements the placement check standalone:
  • RandomSpreadStructurePlacement via its public getPotentialStructureChunk(seed, x, z) (covers mineshaft, villages, temples, monuments, bastions, fortresses, end cities, ruined portals, …).
  • ConcentricRingsStructurePlacement via recomputed ring positions (BiomeSource.findBiomeHorizontal, cached per (placement, seed), with an "any biome" fallback when the preferred-biome tag is unbound).
  • FrequencyReduction is now honored through the public applyAdditionalChunkRestrictions.
  • Per-structure biome gate now calls VanillaBiomeChecker.quartYForSurfaceMatches, unifying surface/cave quart-Y with the biome checker.
• WorldContext build API: removed the broken structureState field and unused holders; now carries HolderLookup.Provider + noiseSettingsKey.
• MinecraftWorldContextFactory: updated to construct WorldContext with the registry provider + noise-settings key.

Known feature

• ExclusionZone interactions between structure sets are not yet enforced (accessor is protected; no vanilla structure of interest uses one).