9c645413f1
The reach test I deferred twice. sylpheed-port tested three screens across the stale and fixed ui_layout.rs eras, found 0 differing pixels, and concluded the eras explain nothing. Built both eras from source and rendered EVERY composable GP_TITLE bundle through each. 7 of 16 differ. Entries 0-6, 8 and 9 are byte-identical -- which includes title (4), main_menu (5) and extras (6), so the port's result reproduces for the screens they picked. Entry 7 (title_jp) differs by 74 507 px, RMSE 12.409; the two loading bundles by 49 771 px, RMSE 10.078; the four splashes by 23-33k px at RMSE 0.94-1.78. So "the eras explain nothing" is true for three screens and false for the archive. It is specifically false for title_jp, which is one of the two rows their check-all now allows BY NAME with the reason "rest-pose sparkles". Their measurement of that screen was 0 and mine is 74 507; recorded with exact flags as a disagreement for them to check, not adjudicated. Noted that their branch's ui_layout.rs is the stale one (20 ins / 488 del against the pin), so a binary built from their workspace HEAD is the stale era. Two controls, both run first. The binaries genuinely embody the eras: build 5's pteff00.prm reads `rest t=70 [12 70 80 -]` stale against `rest t=12 [0 12 70 80]` fixed. And the renderer is deterministic: same binary, same flags, twice, 0 differing pixels on entries 7 and 12 -- without which every number is noise. Mechanism on entry 7 is a single element, ptlogo_eff3.t32, rest (108,72) -> (98,42). That is the element MISSION.md and ui-resting-pose.md already name as THE plateau-less rest() discriminator, so the era difference on the JP title is our existing open question surfacing rather than a new one. And a trap: entries 10-15 differ by up to 49 771 px with NO rest position change. The rest selection moves to a keyframe at the same (x,y) with a different scale and alpha. My first extraction compared only the rest (x,y) column and would have reported a difference with no cause. A pose is position and scale and alpha. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
47 lines
2.6 KiB
Plaintext
47 lines
2.6 KiB
Plaintext
# The two decoder eras, rendered: all 16 composable bundles of GP_TITLE.
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# 2026-08-30.
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#
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# STALE era = origin/main (ui_layout.rs: "Keyframe time, or None for the
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# group's last frame" -- a pose's time read from the NEXT record)
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# FIXED era = formats-pin-2026-08-30 == this branch (a pose's time PRECEDES it)
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#
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# Both built from source; renders are `screen render --all --build N --primitives`.
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#
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# CONTROL 1 -- the two binaries really do embody the two eras:
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# stale rest (0,0) t=70 [12:0,0 70:0,0 80:0,0 -:0,0]
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# fixed rest (0,0) t=12 [0:0,0 12:0,0 70:0,0 80:0,0] (build 5, pteff00.prm)
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# CONTROL 2 -- the renderer is deterministic: same binary, same flags, twice,
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# entry 7 -> 0 differing px, entry 12 -> 0 differing px.
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entry what differing px RMSE max|d|
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0 loading 0 0.000 0
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1 loading 0 0.000 0
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2 plate 0 0.000 0
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3 plate 0 0.000 0
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4 title 0 0.000 0
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5 main_menu 0 0.000 0
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6 extras 0 0.000 0
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7 title_jp 74507 12.409 233 <-- DIFFERS
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8 main_menu_jp 0 0.000 0
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9 extras_jp 0 0.000 0
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10 splash publisher 32842 1.767 35 <-- DIFFERS
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11 splash developer 23201 0.942 31 <-- DIFFERS
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12 loading (dressed) 49771 10.078 229 <-- DIFFERS
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13 splash publisher twin 31708 1.782 35 <-- DIFFERS
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14 splash developer twin 23201 0.942 31 <-- DIFFERS
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15 loading twin 49771 10.078 229 <-- DIFFERS
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7 of 16 bundles differ between the eras; 16-7 are byte-identical.
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# MECHANISM, entry 7 (title_jp): exactly ONE element's rest POSITION moves.
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# stale 8 ptlogo_eff3.t32 ... rest (108,72)
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# fixed 8 ptlogo_eff3.t32 ... rest (98,42)
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# ptlogo_eff3.t32 is the element MISSION.md and ui-resting-pose.md already
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# name as THE plateau-less rest() discriminator. 74 507 px, RMSE 12.4.
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# MECHANISM, entries 10-15: NO rest position changes at all. The rest
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# SELECTION moves to a different keyframe which happens to sit at the same
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# (x,y) with a different SCALE and ALPHA -- e.g. pgloading_delta.t32 holds
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# (120,560) at 0%,0% a=0 / 75%,75% a=128 / 96%,96% a=192. Comparing the
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# 'rest (x,y)' column alone says nothing changed; the pixels say otherwise.
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