It computed ok, printed a red line when a cue was silent, and the python had no
exit path at all, so it returned 0 every time while check-all registered it
must-pass. A cue could stop sounding and the suite would print the failure and
stay green.
This project's recurring defect one level up: not an instrument sitting below
the thing under test, but one that SEES the failure and does not report it.
The diagonal now exits. The no-op-silence and cue-order lines stay REPORTED --
both carry documented cross-run instability (whole-buffer recording shifts; a
0.15 margin this file's own comments show reaching 0.109 on a sounding cue), and
making either binding would produce red on correct audio.
--control feeds it a walk in which move never sounded, built from the tool's own
suppression machinery, and requires it to fail.
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