AI-driven head rework: judge picks the decimated MakeHuman head over the displacement shell

TODO.md

@@ -80,16 +80,18 @@ the rest of §C remains the broad review checklist.
 
 ### 3. Head and face prototype
 
+### 3. Head and face prototype
+
 - [x] Build one `npc_casual` head/face prototype as a connected head shell plus intentional feature
       geometry — not a sphere with floating facial balls. Use loop-based eye sockets/lids, a
       readable nose bridge/tip/ala, a mouth with upper/lower lip volumes, ears with concha depth,
       and brow/cheek/jaw planes that survive the 256² AO bake.
-      `tools/npc_parts.py build --part head_proto` displaces a seg-48 shell into eye sockets with
-      an orbital rim, a nose bridge/tip/ala, upper/lower lips, a chin bump, a brow step, a sloped
-      forehead and extruded ears (helix + concha + lobe); the eyeballs stay separate. Objective
-      centre-profile evidence: nose tip −0.192, brow −0.150, chin −0.149, jaw step −0.11, forehead
-      −0.126→−0.078. Vision-judged ~3/5; remaining polish (forehead/ear/jawline read) is folded
-      into §3.2 comparison.
+      `tools/npc_parts.py build --part head_proto` built the displacement shell (sockets, nose,
+      lips, chin, brow, ears) but the AI-judged rework (concept + judge, see
+      `docs/3d-model-review.md` §AI-driven head rework) shows it oscillates between "egg" and
+      "spiky" at ~3/5. The judge's decisive result: **ship the decimated MakeHuman head**
+      (1,573 tris, nose/chin/jaw landmarks) plus the project's separate eye/mouth/brow pieces. The
+      displacement `_head_proto` is a rejected variant; the MakeHuman head is the new base.
 - [x] Compare two or three subdivision/loop variants at 1.85 m front/three-quarter/profile and a
       1.5 m portrait. Pick the variant that reads best before changing all 12 characters; keep the
       rejected variants local.