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/README.md

@@ -12,6 +12,7 @@ This folder holds the project documentation, visual references and generated QA
 - [`getting-started.md`](getting-started.md) — setup, run/test commands and controls
 - [`asset-tooling.md`](asset-tooling.md) — image/model pipelines and screenshot gates
 - [`npc-visual-review.md`](npc-visual-review.md) — NPC visual baseline, acceptance criteria and ranked gaps
+- [`npc-proportion-audit.md`](npc-proportion-audit.md) — NPC proportion ratios and stylized guide results
 - [`development-status.md`](development-status.md) — implemented features and current gaps
 - [`smoke-checklist.md`](smoke-checklist.md) — manual verification
 - [`ui-copy.md`](ui-copy.md) — screen, copy and button inventory

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

docs/development-status.md

@@ -39,6 +39,7 @@ Implemented so far:
 - Aim-free selection pass (v0.3.0 work, [ADR-0011](adr/0011-aim-free-selection-and-precision-walk.md)): the focus cone ranks candidates by angle then distance, `Tab` and the mouse wheel cycle nearby people nearest-first and pin the selection, right click clears focus with a short re-acquire grace, the HUD reports how many people are in the ring, and holding `Shift` walks at half speed for close work
 
 - Visual alignment: start/venue menu, pause, settings, shift review, radio, wand, inspection, timeline, HUD target chip/escalation bar, and radial menu now use or match their AI references in `assets/images/ui/`. The runtime art loader (`src/game/ui/art.gd`) falls back cleanly when a file is missing. The wand panel lists the guest's carried items, and multiline HUD/wand strings render real line breaks.
+- NPC proportion audit (0.9.4 work): `tools/npc_proportions.py` measures all eight GLBs against a stylized height/head/shoulder/hip/torso/leg/arm/foot guide. All variants pass; the head and broad-build silhouettes are the nearest upper bounds. Results are in [`npc-proportion-audit.md`](npc-proportion-audit.md).
 - NPC P1 portrait fixes (0.9.4 work): tourists now hide their photo-pose camera bag outside `photo`/`film` poses, removing the duplicate-backpack silhouette; the backpack gear was rebuilt with flattened, forward chest straps and a fresh AO map. The before/after sheet is [`blender_previews/sheet_npc_baseline_compare-p1.jpg`](blender_previews/sheet_npc_baseline_compare-p1.jpg); the face and remaining clothing/hand work stay open.
 - NPC visual baseline (0.9.4 work): `src/test/capture_npc_baseline.gd` captures all eight library characters from front, three-quarter, profile, back, full-body and crowd views in a neutral studio (48 frames). The criteria, measurements and ranked gaps are in [`npc-visual-review.md`](npc-visual-review.md); the committed sheet is [`blender_previews/sheet_npc_baseline.jpg`](blender_previews/sheet_npc_baseline.jpg). No model changes were made in this baseline step.
 - UI-state capture pass (0.9.3 work): `src/test/capture_ui_states.gd` adds committed captures 14–21 for the start menu, pause, settings, shift review, emergency radio, action wheel, crowd panic and responder arrival. Every one of the 21 catalogue entries now has a current-build capture; `tools/check_screenshots.sh` reports 21 good / 0 bad and the automatic judge reports 21/21 match, 0 diff. Crowd panic and responder arrival are staged presentation frames, not gameplay changes.

docs/npc-proportion-audit.md

@@ -0,0 +1,79 @@
+# NPC proportion audit
+
+Status: audited 2026-11-02. All eight library variants are inside the stylized
+proportion guide; no geometry correction was required in this pass. The report
+is repeatable from the exported GLBs:
+
+```bash
+python3 tools/npc_proportions.py report
+python3 tools/npc_proportions.py report --json
+```
+
+## Method
+
+`tools/npc_proportions.py` reads the GLB meshes and rest-pose joint hierarchy:
+
+- height from the full mesh bounds;
+- head height, width and aspect from `Head`/`skin` vertices (hair excluded so
+  long hairstyles do not change the head measurement);
+- shoulder silhouette from vertices in the upper-chest band around the
+  shoulder joint;
+- hip width from `HipL`/`HipR` pants vertices;
+- torso length from the Spine joint to the shoulder joint;
+- leg length from the Spine joint to the lowest vertex;
+- arm length from the shoulder joint to the Hand joint;
+- foot length from the forward extent of the KneeL/KneeR shoe vertices.
+
+All ratios are divided by total standing height except `head_aspect`
+(width / head height).
+
+## Guide
+
+These are stylized-but-credible bands for the game's low-poly adults, not
+photoreal anatomy. The broad build is allowed a larger shoulder/hip silhouette
+than the slim build.
+
+| Ratio | Target | Notes |
+| --- | ---: | --- |
+| `head_height` | 0.16–0.22 | deliberately larger than a realistic 0.13–0.15 |
+| `head_aspect` | 0.70–1.00 | width / height; rounded heads are acceptable |
+| `shoulder_width` | 0.28–0.38 | silhouette includes sleeves and build scaling |
+| `hip_width` | 0.17–0.23 | pants-only width, not skirt/coat flare |
+| `torso_length` | 0.28–0.38 | Spine joint to shoulder |
+| `leg_length` | 0.40–0.48 | Spine joint to ground |
+| `arm_length` | 0.28–0.38 | shoulder to hand |
+| `foot_length` | 0.12–0.18 | shoe forward extent |
+
+## Result
+
+| Character | Height | Head | Aspect | Shoulder | Hip | Torso | Leg | Arm | Foot | Result |
+| --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | --- |
+| `npc_casual` | 1.824 m | 0.190 | 0.907 | 0.320 | 0.209 | 0.307 | 0.449 | 0.329 | 0.144 | PASS |
+| `npc_jacket` | 1.824 m | 0.190 | 0.907 | 0.325 | 0.209 | 0.307 | 0.449 | 0.329 | 0.144 | PASS |
+| `npc_coat` | 1.824 m | 0.190 | 0.907 | 0.329 | 0.209 | 0.307 | 0.449 | 0.329 | 0.144 | PASS |
+| `npc_vest` | 1.819 m | 0.191 | 0.907 | 0.321 | 0.210 | 0.308 | 0.451 | 0.330 | 0.144 | PASS |
+| `npc_dress` | 1.825 m | 0.190 | 0.907 | 0.287 | 0.191 | 0.307 | 0.449 | 0.329 | 0.144 | PASS |
+| `npc_hoodie` | 1.856 m | 0.187 | 0.907 | 0.320 | 0.205 | 0.302 | 0.442 | 0.323 | 0.141 | PASS |
+| `npc_firefighter` | 1.819 m | 0.191 | 0.907 | 0.356 | 0.225 | 0.308 | 0.451 | 0.330 | 0.148 | PASS |
+| `npc_guard` | 1.819 m | 0.191 | 0.907 | 0.370 | 0.219 | 0.308 | 0.451 | 0.330 | 0.144 | PASS |
+
+No variant is outside a band, so the body pass does not need a global skeleton
+or mesh rescale. The values closest to a boundary are:
+
+- **head height 0.190** against the 0.22 upper bound, and **head aspect 0.907**
+  against 1.00 — the head is deliberately large. Any head-size change must be
+  coordinated with the face/headgear pass and its gear-fit measurements.
+- **guard shoulder 0.370** and **firefighter hip 0.225** against the broad-build
+  upper bounds — these are the intended uniform/turnout silhouettes, not
+  outliers.
+- **leg length 0.449** and **torso 0.307** sit inside the guide for all variants;
+  the earlier short-leg impression came from the hip joint position, not the
+  visible pelvis line.
+
+## Follow-up
+
+The proportion audit does not replace the visual criteria in
+[`npc-visual-review.md`](npc-visual-review.md): neck/shoulder/hip transitions,
+face depth, hand grips, clothing hems and shoes still need the appearance pass.
+Re-run the audit after any body mesh or skeleton change and record the new
+ratios here.

docs/npc-visual-review.md

@@ -84,6 +84,14 @@ silhouette (normal for a backpack, suspicious when it is a strap). Runtime
 `NpcAvatar.GEAR_OFFSETS` is applied after attachment and is not part of the GLB
 measurement.
 
+## Proportion audit
+
+The separate [`npc-proportion-audit.md`](npc-proportion-audit.md) measures
+height, head size, shoulder/hip width, torso, leg, arm and foot ratios for every
+variant with `tools/npc_proportions.py`. All eight pass the stylized guide; the
+head and broad-build shoulders sit nearest their upper bounds. No skeleton or
+mesh proportion change was needed in this pass.
+
 ## Baseline measurements
 
 From `python3 tools/blender_assets.py fit` and the manifest: