The pre-registered wider test refuted my own claim. Pressing A at the
sweep's gate instead of 40 frames later leaves ~40 frames of artwork
animating: three elements mid-fade-in vanish in one frame and the settled
set appears at 255. The sweep enters at 255 with NO ramp where the control
ramps it 17->255 over ~15 frames, so the title clock jumped past t=100 --
and not past 250, since ptloop01's exit would have hidden the sweep.
So clock:"shared" is NOT refuted. I told the port the opposite and must
correct it.
Cause: the press takes 11-12 frames to take effect (f445->f456, f424->f436)
and my 5-frame artwork window sat entirely inside that gap. It matched the
control because the input had not been acted on yet. The window was not just
short, it was positioned where the effect cannot appear.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
24719d3c72