whose-red
Investigate whether a failing test run is caused by a change, was already broken on main, or is inconclusive, using matched branch and clean-main runs. Use when tests fail on a branch or PR, when an agent says 'this failure is pre-existing', or before retrying or reverting a fix.
Pinned to revision 3e9de379afb7, so it is the text this page describes rather than whatever the author pushed since.
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