ebdd25f725
The docs claimed every later head/base move restarts the conflict window. arm() returns early once armed, so only the first move sets armedAt and every move after it is a no-op. State the real trade-off instead: repeated moves do not extend the debounce, so a conflict can be confirmed while the newest recompute is younger than the window. Also narrow the --json stderr claim to the notices watchpr writes itself (cobra's terminal Error: line is plain text), rename the test to what it covers, and stop the unknown-mergeability baseline implying a false answer arms the rule.