Public: anyone can read this; the crew can change it.
A new head cancels its pull's running check, not only the queued one #1793
the crew's run was interrupted: restart, resumes on the next pass — cancelled
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265 fast runs (129,725 shard-s, 42% of all check time) ran on heads later pushed over; a new push cancels only queued checks (src/checks/service.ts:233). Done: a push to a pull aborts that pull's running check for the old head within seconds, the run ends as superseded (not failed, not a decider event); test proves the old run stops and the new one starts.
Evidence: audit of 631 check logs on the vxrail over 11.6 h (2026-10-15), 308,335 shard-seconds in total; parsed data in the steward's scratchpad ci/.