Track B: Opus 5.5 with a GPT-6.1-Terra reviewer

command

source ~/Projects/lowmarch-bench/kit/env-b.sh && cp $WORK/sheet_r6_woman.png $WORK/FINAL_woman.png && cp $WORK/sheet_r6_youth.png $WORK/FINAL_youth.png && cp $WORK/expr_list.txt $LOWMARCH_REPO/art/cast/expressions.txt && cat >> $WORK/NOTES.md <<'EOF'
## Round 6 (13:39-13:47, ~8 min) - final

Changed: brows over hair see-through 68% / 34%; tongue darker with a soft top edge; surprised eyes 1.5, mouth O 1.1 +
A 0.15; U = U 0.6 + O 0.8.

Sheets: best round. Surprised now has visibly wider eyes on both; the tongue no longer reads as a stripe; youth's U a
little rounder. FINAL_woman.png / FINAL_youth.png are this round.

Terra r6 critique (summary): readability improved overall, especially angry, surprised, shout; dark interiors add
depth. Woman: sad mouth a small peaked mark; smile ~ neutral; smug relies on a faint diagonal; wink breaks into a
line and scattered lashes; A vs O similar; I ~ neutral. Youth: joy reads as a squint; smile ~ neutral; wink a stiff
wedge; U a slit. Brows sometimes painted-on over the bangs. Next: rebuild winks as one curved lid; separate vowels;
integrate brows further.

Response: no rounds left (6/6). I agree with the wink and vowel points; they are the residuals below. On brows I
keep the decision; their further point (interrupt where strands cross) is a reasonable next refinement.

## Eyebrow decision: draw the brows over the bangs (see-through)

Yes, for our characters. Both test bodies (and VRoid hair generally) have long, opaque bangs that sit on or below
the brow line: Before, the bangs hide most of each brow, so angry, sad and surprised lost their main carrier and read
from the mouth alone. The reference rigs keep their bangs above the brows by design (short, parted bangs); we can't
rely on that for a cast whose hair is built per character, and cutting every fringe above the brows would narrow the
hair designs. So the brow role is drawn over the hair, the common anime "brows through hair" convention, with two
limits:
- It's a depth lift (`BROW_LIFT` = 4 cm toward the camera in the vertex shader), not "always on top": more than the
  bangs stand off the forehead, far less than the head is deep, so a brow still hides behind the skull when the head
  turns away. At 30 degrees the brows stay on the face plane and keep their angle.
- Over hair the brow is tinted toward the hair's own colour (68% where hair lies above and below the stroke, 34% at a
  lock's edge; `browOverHair` in `PAINT_COMP`), so it reads as seen through the hair, not as a sticker.
The reviewer pushed back every round (painted-on look). I accepted softening (tint raised 42 -> 55 -> 60 -> 68%) but
not hiding them again: every round's sheet shows the expressions depend on the brows.

## What changed in code (branch bench-b)

- `review/vroid-02/index.html`: brow depth lift; mouth material kind 10; composite `mouthInside` (dark inside, upper
  teeth band, soft-topped tongue mound, thin slits all dark) and `browOverHair` (see-through brows).
- `tools/vrm.py`: one-sided shape keys (`Fcl_X@L` / `@R`), side taken from VRoid's own EYE_Close_L/R targets, 3 cm
  fade across the midline (used by smug).
- `art/cast/expressions.txt`: the final 14 recipes (the copy of `$WORK/expr_list.txt`): ALL_* shapes split into
  BRW/EYE/MTH parts so brows can be pushed past 1 while mouths are tuned separately.

## What still reads weakly

- Winks: VRoid's closed-eye lash texture leaves stray marks on the woman and a stiff wedge on the youth. Needs a
  drawn lid curve (3D polyline like the mouth curve) rather than shape weights.
- Smile ~ neutral on both (the closed smile line is faint; the eyes barely change at EYE_Fun 0.75).
- Youth's sad: his mouth shapes barely move; the expression rides on the brows.
- Vowels: A vs O too similar on the woman, I close to neutral, the youth's U a slit (MTH_U narrows his mouth hard).
- Open mouths have angular edges (VRoid's low-poly mouth ring); a drawn outline or subdivision would round them.
- Brows over the bangs are uninterrupted where strands cross; a per-strand gap would integrate them further.

Total: 6 rounds, 12:43 to ~13:50 (~67 min including reviewer calls, which took ~15 s each).
EOF
cd $LOWMARCH_REPO && git add -A && git status --short && git commit -q -m "Expressions: brows drawn through the bangs, anime mouth inside, one-sided shape keys, tuned recipes

- Painted renderer: brows lifted 4 cm toward the camera so they draw over the bangs (still hidden behind
  the skull when the head turns away), tinted toward the hair where they cross it.
- Open mouths: VRoid's mouth texture coloured as a dark inside with upper teeth and a soft-topped tongue
  mound (composite pass), thin openings all dark.
- tools/vrm.py: Fcl_X@L / @R recipe keys apply a shape to one side of the face (smug).
- art/cast/expressions.txt: the 14 expression recipes, ALL_* split into BRW/EYE/MTH parts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: [redacted: session link]" && git log --oneline -1; ls $WORK/FINAL_* $WORK/NOTES.md; date

result, 8 lines

A  art/cast/expressions.txt
M  review/vroid-02/index.html
M  tools/vrm.py
fc3970d Expressions: brows drawn through the bangs, anime mouth inside, one-sided shape keys, tuned recipes
~/Projects/lowmarch-bench/work/b/FINAL_woman.png
~/Projects/lowmarch-bench/work/b/FINAL_youth.png
~/Projects/lowmarch-bench/work/b/NOTES.md
Fri Oct 30 01:46:55 PM PST 2026

command

source ~/Projects/lowmarch-bench/kit/env-b.sh && sed -i 's/Total: 6 rounds, 12:43 to ~13:50 (~67 min/Total: 6 rounds, 12:43 to 13:47 (64 min/' $WORK/NOTES.md && tail -1 $WORK/NOTES.md

result, 1 line

Total: 6 rounds, 12:43 to 13:47 (64 min including reviewer calls, which took ~15 s each).

input

{
  "to": "team-lead",
  "summary": "Track B done: 6 rounds, 64 min",
  "message": "Track B is done: 6 of 6 rounds in 64 minutes (12:43 to 13:47). Commit fc3970d on bench-b. FINAL_woman.png and FINAL_youth.png are round 6. NOTES.md has every critique and my response to it.\n\nChanges:\n- Brows now draw over the bangs. The renderer moves them 4 cm toward the camera, so they still hide behind the skull when the head turns. Where they cross hair they take 68% of the hair's colour.\n- Open mouths were a flat brown blob. They now have a dark inside, a white band of upper teeth and a soft pink tongue (a new mouth material plus a composite-pass mouthInside).\n- tools/vrm.py: a recipe can apply a shape to one side of the face only (`Fcl_X@L` / `@R`). Smug uses it for a one-sided smile, one heavier lid and one raised brow.\n- Recipes: the combined ALL_* shapes are split into separate brow, eye and mouth shapes, so brows can be pushed past 1 and mouths tuned on their own. Saved as art/cast/expressions.txt.\n\nEyebrows: yes, over the bangs. On both bodies the bangs hide the brows, and the brows carry angry, sad and surprised. Terra pushed back every round, so I raised the hair tint but kept the brows visible.\n\nStill weak: both winks (stray lash marks), smile looks close to neutral, the youth's sad mouth barely moves, A vs O too similar, the youth's U is a slit, and open mouths have angular edges.",
  "type": "message",
  "recipient": "team-lead",
  "recipient_kind": "name",
  "content": "Track B is done: 6 of 6 rounds in 64 minutes (12:…"
}

result, 1 line

{"success":true,"message":"Message sent to team-lead's inbox","msg_id":"8d675ebe-f614-420f-97e7-e3ca707a4574","routing":{"sender":"bench-b","senderColor":"yellow","target":"@team-lead","targetColor":"red","summary":"Track B done: 6 rounds, 64 min","content":"Track B is done: 6 of 6 rounds in 64 minutes (12:…"}}