Structure DFU Cache 1.0.0

Initial public release for Minecraft 1.21.1 on NeoForge.

Highlights

• Drop-in operation with no configuration or integration API.
• Resolves the effective data-pack structure set during startup or an explicit /reload.
• Uses Minecraft's official DataFixTypes.STRUCTURE and the exact DataFixer owned by StructureTemplateManager.
• Stores passthrough and converted structure bytes in a persistent content-addressed cache.
• Gives normal gameplay a complete single-layer vanilla structure resource pack with no mod tick hook, background cache worker, or runtime DFU job.
• Falls back to the complete original resource manager if a generation cannot be prepared atomically.
• Cache identity includes Minecraft, NeoForge, target DataVersion, and cache format.

Compatibility

• Minecraft 1.21.1
• NeoForge 21.1.248 through the 21.1.x line
• Java 21

Validation

• 11 focused tests passed with no failures, errors, or skips.
• Minimal NeoForge 21.1.248 dedicated-server startup prepared 1,180 effective structure resources with zero vanilla fallbacks before reaching Done.