Write the face/head concrete edits and close the review

docs/3d-model-review.md

@@ -209,6 +209,13 @@ owner review decides.
    asks for concentric eye loops and a 3-loop mouth. This is the largest readability gap and also
    the most expensive (head rebuild + re-UV + re-AO per variant). Needs a targeted single-variant
    prototype before committing to eight.
+
+   Concrete edits (single-variant prototype on `npc_casual`, in `tools/npc_pipeline.py`): recess
+   the sclera into a socket instead of floating a 0.027 sphere on the head surface, add a thin
+   upper-lid plane above each eye, sculpt the cheek/brow/chin from the head sphere's front
+   vertices (the skinned GLB head is a uniform sphere today — no cheek planes, brow ridge or jaw),
+   and replace the single mouth cube with a shallow recessed mouth plus a lip line. Re-UV and
+   re-bake AO for the head, then capture the portrait before touching the other seven.
 2. **No pose/weight evidence (unknown).** Idle, walk, sit, block and turn deformation has never been
    captured as a review set, so shoulder/hip/neck collapse is unmeasured. Cheap to add and it
    gates any claim that the rig is acceptable.