Gate texel density and review scorecard coverage

TODO.md

@@ -116,9 +116,17 @@ except the rebuilt assets themselves.
 
 ### E. Gates and documentation
 
-- [ ] Add the measurable checks the review needs (texel density, weight/pose sanity, collider
+- [x] Add the measurable checks the review needs (texel density, weight/pose sanity, collider
       coverage, LOD/impostor check) as stdlib or GDScript gates where possible; CI stays offline.
-- [ ] Add a coverage test so every catalogue asset has a scorecard row and verdict.
+      (Texel-density gate in `tools/test_blender_assets.py` checks all five slots per character
+      and the 40–400 px/m authored band plus the 250 px/m fabric floor; the pose→bone contract is
+      covered by `test_pose_reaches_the_skeleton_bones`; LOD/impostor already has
+      `test_avatar_mesh_budget_and_lod_swap`. Collider coverage is still open — split below.)
+- [ ] Add a collider/proxy coverage check: every library prop that blocks walking has a
+      `StaticBody3D` + `NavigationObstacle3D`, checked against the catalogue.
+- [x] Add a coverage test so every catalogue asset has a scorecard row and verdict.
+      (`tools/test_model_review.py`: every `CHARACTERS`/`GEAR`/`PROPS` entry needs a row in
+      `docs/3d-model-review.md`, and character rows need a non-empty verdict.)
 - [ ] Update `docs/blender-assets.md`, `docs/npc-visual-review.md`, `docs/3d-model-review.md`,
       `docs/architecture.md` and `AGENTS.md` with the skill routes and the new gates.
 - [ ] Record accepted limits and deferred rebuilds in `docs/known-limitations.md` and `MEMORY.md`.