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The Decoder's closing point -- the inference is cheap and the measurement looks expensive right up until someone does it -- is actionable, so the probe I reverted is now permanent. The exporter records each transcode's duration and frame rate in the manifest (probed from the file it wrote, not the source), and every video run prints what it showed against what the media holds. An instrument that has to be added before the question can be asked will not be there the next time somebody reasons instead. Then the instrument corrected me twice more. It is an UPPER BOUND, not a count. It counts engine frames, and the engine renders the UI at its own rate: on a quiet box ADV drew 6480 frames across a 4123-frame video, 44 fps against the media's 30. Above that crossover it constrains nothing, and '157% presented' is the counter used outside its range. The report now says so instead of printing a percentage. So 'the player skips, heavily' is not supported. At 8.3 engine fps under contention S00A could not have shown more than 28% -- a valid bound under contention and nothing more. Quiet, the bound is 88-90%, permitting anything from no drops to a tenth. And the 720p-versus-432p contrast is refuted -- the finding I sent them twice. I reported ADV +6.7% against S00A -0.5% and built 'heavy decode falls behind, light keeps up' on it. Quiet, both run +6.7...+6.9%. The -0.5% was a contended run in which the player dropped frames to hold schedule. I was measuring which run happened to share the box and reading it as a property of the resolution. What survives is sturdier than either: playback runs +6.7%...+6.9% long on this container, five runs, both videos, quiet, resolution-independent. Three corrections in three iterations, all mine, all the same shape: argued from an absence; measured and over-read; then found the measurement was taken under a confound I introduced myself by running the suite alongside it. Their rule needs a companion -- ask what the quantity can be skipped by, and ask what else was running. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N7FiFFFwbvG2uxdcEh8HyF
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