YMT Editor for RDR2

The tool provides a structured interface for editing YMT-based entity metadata used in Red Dead Redemption 2. It separates data concerns from binary editing by exposing a schema-aligned model of entities, attributes, and relationships. Conceptually, edits are expressed as patches that are merged into a base asset, with strict validation against the appropriate schema version. The primary users are modders, asset teams, and QA engineers who need reproducible changes, traceability, and version-consistent patches. Unique value comes from deterministic merges, version-aware validation, and exportable diffs that can be reviewed before deployment. Core features include import of either a base asset blob or a patch, entity selection by id, patch application, schema validation, and export of updated assets or patch files. Advanced users can perform batch edits across multiple entities, generate change diffs, and compute data integrity checksums for audit trails. Use cases include updating metadata for new in-game items, correcting attribute values, or aligning assets across builds while maintaining a clear lineage of edits. The tool supports offline workflows and integrates with mod distribution pipelines by producing patchable outputs rather than brute-force binary edits.