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handoff: F5 -- A cuts the plate to final; clock:"shared" refuted

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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
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sylph-decoder
2026-09-02 20:07:53 +00:00
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@@ -6084,3 +6084,30 @@ too fast.
identified by position only, and lands at `t≈137` where the declared plate is
`t≈236`. Unit 9's onset *fraction* is measured against it and inherits that
doubt. The `t=70`/`t=100` numbers above are declared and do not.
## F5 — Ⓐ **snaps** the plate, and does **not** advance the artwork (`0a2ff9f`)
`docs/re/f5-a-press-snaps-the-plate.md`. Three captures, one press and two
no-press controls, aligned by the sweep's position rather than frame number.
**Plate alpha from its first draw:**
| no input | **23 · 46 · 69 · 92 · 115 · 139 · …** ~11 frames of ramp |
|---|---|
| **Ⓐ during build-in** | **255 — one frame, nothing before it** |
Zero intermediate values against eleven: it is a **cut**, not an acceleration.
Implement Ⓐ as "plate to final pose", not as a rate multiplier.
🔴 **`clock: "shared"` is refuted, on F4's own discriminator.** F4 said: press Ⓐ
early and watch the **artwork**, not the plate — snapping means one clock,
animating means Ⓐ only forces the plate. **The artwork keeps animating**, frame
for frame identical to the control across the press. So the title is not one
clock, and Ⓐ must not advance the artwork's timeline.
⚠️ **Reach:** the artwork half rests on a 5-frame window (the only stretch where
the press had landed and artwork was still animating; everything else was already
at α255). The plate half is not so limited — 0 vs 11 intermediate frames.
⚠️ Also: Ⓐ **after** the title settles is *accepted* and the screen leaves. Three
presses to boot, as F4 said.