Retires state:needs-rebase. Mergeability, check status and the review round
are independent facts; forcing them through one totally-ordered label meant
one always won and the rest vanished, which is where every precedence bug in
this machine has lived. needs-rebase was the clearest casualty -- it fired on
both a conflict and a failing check, which need opposite work.
Blockers are a set, so there is no ordering between them to get wrong. The
ordered axis is now purely about reviews. bots-reviewing also tightens to mean
a request is actually live; a PR nobody was asked to review is the agent's.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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