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Verifying it previously meant launching the script, which then waits ~150 s for a main menu and opens x11grab captures -- so the question "did the self-test pass?" could not be answered without disturbing whatever else was using the display. That is how a check-the-tool step turned into competing load during a measurement once already. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v