Audit NPC body proportions against a shared guide

Measure all eight exported characters and record the stylized proportion bands. All variants pass; no skeleton or mesh rescale was needed.

docs/asset-tooling.md

@@ -213,6 +213,11 @@ and firefighter helmet so the badge clears the jacket and the brim does not sit
 over the eyes; these are `NpcAvatar.GEAR_OFFSETS`, not changes to the gear
 contract.
 
+`tools/npc_proportions.py` checks the eight character GLBs against the shared
+height/head/shoulder/hip/torso/leg/arm/foot guide; the current results are in
+[`npc-proportion-audit.md`](npc-proportion-audit.md). It reads the exported GLBs
+and does not require Blender.
+
 `capture_npc_baseline.gd` is the 0.9.4 neutral baseline: eight characters ×
 front/three-quarter/profile/back/full-body/crowd = 48 frames with a fixed
 camera, studio lighting and no venue/HUD/animation. The raw PNGs stay in