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The era test left one element responsible for all 74 507 differing pixels on title_jp -- ptlogo_eff3.t32, the corpus's named plateau-less rest() discriminator -- with two candidate rest poses, (108,72) stale and (98,42) fixed. There is a capture of that exact screen, so the oracle can choose. Scored over the 388x423 box where the two renders differ, so the result is not diluted by the ~92 % of the frame that is identical: stale era rest (108,72) RMSE 58.412 fixed era rest (98,42) RMSE 41.690 <- the game agrees with the fixed era fixed era --settle t=213 RMSE 40.210 Until now the keyframe record-layout fix rested on internal consistency: 0 of 1 042 multi-segment alpha ramps constant-rate under the old reading against 857 of 1 540 under the new. Strong, but not a measurement of the game. It now has one, on the single screen where the two readings change pixels. Three controls, all run first. Alignment found by sweeping the vertical offset rather than assuming it -- 45 gives 32.41 against 56.37 and 53.08 either side, a sharp minimum at the known game-surface offset. The scoring box discriminates: the same box against a different screen's capture gives 98-103 against 40-58 here. And --black changes nothing (58.412/41.690 either way) because every pixel in that box is covered by an element -- recorded because the flag's help says a framebuffer capture must be compared against a black canvas, and here it happens not to matter. Sweeping the screen's own timeline with --at gives the noise scale: the capture sits on a plateau from t~135 to t~240, flat to 1.2 RMSE across 105 units, rising sharply outside (78 at t=0 and t=270). So the stale-vs-fixed margin of 16.7 is ~14x that flatness and decisive, while the settle-vs-rest margin of 1.5 is INSIDE it and is not. This capture separates the eras and cannot separate the policies; the settle-instant proposal stays unadopted. Refutation attempted: sylpheed-port's adjudication that their shipped pose is closer to the game than their reference. It SURVIVES, independently and by a different metric, in the same direction. Also concedes that my "your branch is the stale era" reasoning was invalid -- I inferred era from a line count, which is the error they named -- while recording that the conclusion holds for the ref I could see: origin/auto/port-p6-audio's ui_layout.rs is md5-identical to origin/main's. METHOD: two things that should differ producing identical output is a broken experiment until proven otherwise, and a zero is its most dangerous form. Four instances now. Verify the inputs differ before believing the outputs match, and do not infer that difference from a proxy -- line count is not era. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
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