Retarget the MakeHuman body to the 13-bone contract (arm-down + weights + skinning)

docs/npc-model-sourcing.md

@@ -206,6 +206,16 @@ only, one neutral material, UVs present, no rig). The body is the input for the
 contract-rig/retopology step; the script and mesh stay under `tmp/` and are never
 committed.
 
+Retarget prototype (2026-11-04): `tmp/npc-research/makehuman_retarget.py` rotates
+the A-pose arms down (−38°/+38°) and scales them **1.63×** to the contract 0.70 m
+arm, welds the split vertices, smooth-shades, adds the 13-bone contract armature
+with the project's distance-to-bone `_auto_weights`, renames the mesh to
+`npc_base`, and exports `makehuman_retargeted.glb` — **6,444 tris / 7,186 verts**
+(under 8,000), 14 bones, skinned, arm-down, grounded. The proportion warp (1.63×
+arms) is the same class of issue that blocked Quaternius; here it is accepted for
+the body retarget. Remaining: only the `skin` slot is painted — cloth, pants,
+accessory and hair need the clothing/retopology step.
+
 - MPFB/MakeHuman is installed and run by a contributor, never by CI or the game
   build.
 - Generated bodies and intermediate exports stay in `tmp/` (gitignored); the