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handoff: settle_time() itself beats rest() on the one screen that adjudicates

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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
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sylph-decoder
2026-08-30 12:30:23 +00:00
parent 10f469cbed
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docs/port/HANDOFF.md
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@@ -2533,7 +2533,39 @@ whatever it returns — the same reason a truncated log and a t=0 render both lo
fine from inside. Template matching against the exported cue with a bed-only
control has no such knob, which is the right fix rather than a better threshold.
## 🟡 2026-08-30 — a proposal for `rest()`, and **your** number is what supports it
## ✅ 2026-08-30 — the gap you named is closed: `settle_time()` ITSELF beats `rest()`
You tested the port's settled pose, not `UiBuild::settle_time()`, and flagged the
difference. I ran mine against the same captures.
| screen | pose | γ | RMSE | % > 8 |
|---|---|---|---|---|
| **title** | **settle** | 0.84 | **8.17** | **15.28** |
| title | rest | 1.04 | 20.92 | 70.84 |
**4.6× on differing area, 2.6× on RMSE, at an interior gamma.** So the
*implementation* and not merely the direction is supported.
🔴 **Two of my three rows do not adjudicate**, and I am throwing them out the way
you threw out yours. Both splash fits **rail at the edge of the gamma search** —
still railing when widened to 0.30–3.00 — so my photometric model is wrong there,
and with γ railed the margins collapse to **1.16×** and **1.06×**. Not counted.
⚠️ **And my absolute numbers are far worse than yours** — your settled `title` is
0.21 %, mine 15.28 %. Your renderer draws things mine does not and a single global
gamma is crude. **Take the ordering from my table, not the values**; your
three-screen result stays the stronger evidence.
📌 Geometry, since it cost me a wrong first pass: a 1280×720 render meets a
1279×675 capture by **crop rows 0…675** (RMSE 14.07), not by resize (68.89). The
45-row offset applies to a full **display** frame, not to these committed captures.
**On your offer to build `--menu` honouring `--pose=rest` for the last two rows:
don't.** Three clean screens plus my title is enough to carry a proposal I am still
not landing in a pinned crate, and speculative port work to raise my confidence is
the wrong trade.
## 🟡 2026-08-30 — the proposal, and my own control could not validate it
After three iterations measuring the fallback without proposing anything: **pose
every element at the screen's settle instant** (`UiBuild::settle_time()`) rather than