Add MakeHuman head hair/body prototype and 12-variant rollout plan

MEMORY.md

@@ -10,15 +10,23 @@ canonical implemented-features list in `docs/development-status.md`.
   the licence gate. Downloads live in `tmp/research/` (gitignored): DDG image search, street-view
   frames, neighbouring buildings — never committed, never shipped. Promotion into
   `docs/screens/refs/` always passes the sidecar licence + privacy gate and `CREDITS.md`.
-- **MakeHuman head prototype (2026-11-04):** `assets/models/blender_src/makehuman_head.glb`
-  is a local 12,641-tri/7,690-split-vert head derived from the CC0 MakeHuman base,
-  with a review sheet and `docs/makehuman-head-review.md`. The latest build uses a
-  skin eyelid mask (almond aperture cut from a sphere), recessed globes, flat iris/pupil
-  discs and surface-anchored brows. The automated vision gate still rejected it:
-  the eye depth reads inconsistently across front/three-quarter/profile and the lid
-  does not visibly overlap the globe. It is not rigged, textured, integrated or
-  shipped; keep the source/rejected parts in `tmp/` until real eyelid masses pass
-  the gate.
+- **MakeHuman head accepted (2026-11-04, owner):** the basic human head is a pass.
+  `assets/models/blender_src/makehuman_head.glb` is the CC0 MakeHuman-derived head
+  (12,642 tris / 7,690 split verts). The automated vision gate still records REJECT on
+  the eye/lid region (globe depth, lid overlap, iris at three-quarter) as deferred
+  polish, not a blocker. The assembled path (`build_character(head="mh")`) adds a
+  skull-conforming hair cap derived from the closed head shell, hides the scalp under
+  that cap, and narrows the neck/shoulder body. Default head source stays `face` until
+  the owner reviews the hair/body and the 12-variant rollout starts.
+- **MakeHuman hair/body prototype (2026-11-04):** `npc_casual --head mh` is
+  14,753 tris / 12,822 raw / 12,823 seam-split verts / 14 bones / 9 materials,
+  `inspect` clean. All 12 variants were counted at 14,693–15,987 tris. Hair uses flat
+  shading normals because the old hair normal map caused dark tangent patches on the
+  new cap. Scalp faces fully covered by the hair cap are deleted (saves ~950 tris);
+  the accepted face geometry is untouched. The procedural body was narrowed at the
+  neck/shoulders (shoulder root z 1.345, chest 0.158, neck 0.060/0.054) and its skin
+  decimate dropped to 0.21. The local renders are in
+  `tmp/npc-parts/prototype_mh/renders/`.
 - **Project agent skills (2026-11-03):** two tracked skills live in `.agents/skills/`:
   `gig-line-blender-asset-contract` and `gig-line-release-qa`. They are guidance only,
   add no runtime dependency and are referenced from `tools/README.md`. The third-party
@@ -114,6 +122,12 @@ canonical implemented-features list in `docs/development-status.md`.
   out of a portrait frame (park the rest of the crowd away instead).
 - Blender: `bisect_plane` and thin bevels leave zero-area triangles (Godot "non-finite normal in
   LOD generation"); `_clean()` + a weld after bisect fixes them and the audit rejects them.
+- MakeHuman head/hair gotchas: the imported head is broad and flat, so a separate hair
+  ellipsoid floats or leaves a bald patch; derive the cap from the closed head shell and
+  boolean-cut the hairline. Do not reuse the skull's UVs with the old `hair_normal.png`
+  (dark tangent patches) — hair skips the normal map. Generate the cap before deleting
+  the hidden scalp, or the cap inherits the hole. The flatpak sandbox cannot read `/tmp`;
+  helper scripts must live under `$PWD`.
 - Image models have per-model size floors/caps (Seedream needs 1920+; `GEN_SIZE=2048`, do not
   lower; gpt-5-image-mini caps lower). `generate_image` applies model-specific sizing; concept
   generation defaults to `--request-size 1536`.