sylpheed-port's point: a control that runs where the tool does not look proves
nothing about the tool. Case 2 plants a revival INSIDE the scanned root and demands
exit 1; a new case plants the same text OUTSIDE it and demands exit 0. The pair
asserts the scan boundary is real rather than leaving it to be reasoned about --
which is how I had it, correctly but only in my head.
Verified first by hand: identical plant text gives exit 1 inside the root and 0
outside it. Five cases now, all passing, and the real corpus still runs clean.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
b2a2c6a834