Build and document the canonical quaternius_base.glb (welded, skinned, 62-joint, 1.81m)

TODO.md

@@ -58,8 +58,11 @@ baseline sheet.
       Decided: the three full GLBs are the canonical-base + silhouette-gate scope. They cover
       ~3 of 12 roles (casual, hood, vest); jacket/coat/dress/responder/guard need the 21-part
       modular builder or new clothing at §4. Recorded in `docs/npc-model-sourcing.md`.
-- [ ] Build a canonical `quaternius_base.glb`: one welded, triangulated, grounded 1.81 m
+- [x] Build a canonical `quaternius_base.glb`: one welded, triangulated, grounded 1.81 m
       humanoid with front on Blender −Y, no animation, and a documented bone/part inventory.
+      Built from `Casual_Hoodie.glb` via `tmp/npc-research/build_quaternius_base.py`: one `npc_base`
+      mesh (3,199 welded verts / 6,206 tris), 62 joints, skinned, 1.81 m grounded, T-pose, no
+      clips, `inspect` clean. Inventory in `docs/npc-model-sourcing.md` §Canonical base.
 
 ### 2. Contract bake and animation
 

docs/npc-model-sourcing.md

@@ -122,6 +122,20 @@ region first, then material — the same material name can mean `cloth` on the b
 | `Orange`, `LightBlue`, `LightBrown`, `Brown`, `Brown2` | Legs | `pants` |
 | `Worker_Vest` | Worker body | `cloth` |
 
+### Canonical base (built 2026-11-05)
+
+`tmp/npc-research/quaternius_base.glb` is the welded, triangulated, grounded, animation-free
+canonical base built from `Casual_Hoodie.glb` (the most detailed body) by
+`tmp/npc-research/build_quaternius_base.py`:
+
+- one `npc_base` mesh — 3,199 welded verts / 6,206 tris (Body + Feet + Head + Legs joined);
+- 62 joints, skinned (no unskinned faces);
+- height 1.81 m, feet at y 0, front on Godot +Z / Blender −Y (T-pose rest);
+- no animation clips; `inspect` clean (no issues).
+
+This is the §2 contract-bake input: the 62-joint rig is authoring-only and is mapped to the
+13-core contract next, not shipped as-is.
+
 ## Contract mismatch
 
 The expensive part is the rig and proportions, not the mesh. The source has a