clawbot 7702f38168 Mark superseded commits honestly instead of skipped (closes #152) ...

Gitea records a cancelled run as failure, and the #119 repair rewrote
that to skipped. Gitea's Combine() folds skipped into success, so a
commit nothing ever tested reported a combined green — observed on three
commits on next, including the very change a prior integration review
had failed a PR for.

Superseded commits are now marked failure with an honest description, so
never-tested no longer reads as passed and git bisect archaeology can
tell "passed", "failed" and "never ran" apart. Option 1, re-running the
superseded commit, was verified unreachable for automation on Gitea
1.25.4: no rerun endpoint, dispatches takes a ref not a SHA and lands
under a different context, and CancelPreviousJobs is unconditional.

The rewrite moves out of the workflow into script/ci-mark-superseded so
the tested artifact is the shipped one, and every failure path in it is
loud: an unparseable or empty ANCESTOR_LIMIT, an unreadable ancestor
status, and a shallow clone all abort rather than exiting 0 having
marked nothing. Each has a regression test. The status context is
derived rather than hardcoded, which also closes #147 item 2; item 1
remains open.

Independently reviewed four times. The final reviewer confirmed the
shallow-clone test is genuinely shallow — a file:// URL is load-bearing,
since git silently ignores --depth on a local path — and that deleting
the guard fails that one test out of 331 and cannot pass for the wrong
reason. They also reproduced deterministically that go test's cache
serves a stale PASS after a script-only edit, which internal/ciscript's
doc.go now records.

2026-08-18 00:31:55 +02:00

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