Game model cleanup

Preserve the subject's identity while making its geometry and materials suitable for the production contract. Read WORKFLOW.md for the Blender commands and the distinction between cleanup and accepted export.

Establish the source

• Read the coordination board, claim the exact output/tool paths, and use a Git checkout containing the subject's inputs and tooling. Inspect dirty state before any replacement.
• Start from a recorded provider candidate or the approved base of a local variant. Verify its source hashes and rejection/repair decisions. Raw provider exports remain immutable.
• Resolve budgets, required bones/clips, equipment and rig type through ArtSource/3D/Roster/subjects.json and the applicable generated manifest. The original three proof contracts remain under ArtSource/3D/Meshy/manifest.json until their governing plan closes.
• Prefer the source format with verified geometry and texture fidelity. A provider FBX ZIP may be cleaner than GLB, but compare their audits rather than assuming one is always superior.
• Never run the geometry-only cleanup preparer over an already animated production FBX as a routine update: it imports a fresh mesh scene and is not an animation-preserving round trip.

Cleanup decisions