No code fix. The ticket asked that any fix first establish why two of three
green uploads had no artifact at deploy time, and the answer is neither of the
two directions it offered.
Measured over all 100 push-to-main CI runs from 2026-09-19T22:02Z to
2026-09-21T05:02Z, via the run/job/step/log APIs -- job metadata and logs
outlive artifacts, which expire in a day and are all 404 now, so this is
reproducible where the ticket's own artifact-count table no longer is:
12 artifact-not-found failures -- 12 (100%) had another run's SUCCESSFUL
deploy complete inside their own upload->deploy window
56 successes -- 2 (3.6%) did
4 other failures -- 0; all four are the unrelated "Create Pages
site failed: Resource not accessible by integration", pre-improvise-3gy
Direction: the oldest run of the 17:47Z batch failed at 17:47:23Z, before the
next deploy in the batch started (17:47:31Z) and before any Pages deployment
existed at all, since deploy-pages fetches artifact metadata BEFORE creating a
deployment. So it cannot have been caused by its own deploy, by supersession or
by a concurrent one. The artifact was already gone.
Scoped by artifact NAME, not by run: run 35560726456 finalized harness-serve,
wasm-bundles and github-pages seconds apart, and 2m21s later its own lookup
reported "Found 2 artifact(s)" with no github-pages. Same run, same token, same
call, same retention -- which rules out service flakiness, eventual consistency,
retention, token scope and a v3/v4 backend mismatch in one observation, since
any of them would have taken the siblings too.
One clause of the ticket's own correction is falsified: 52507a6 did not fail
"anyway" -- 5f871f7's deploy completed four seconds before its own began. Fewer
successful deploys is the right lever, so PR #46 aimed at the right quantity for
the wrong reason. It still should not ship: the association is not a mechanism
and the mechanism is not deterministic (5f871f7 had a foreign deploy inside its
own window and survived), so shipping it would be exactly
doctrine(measure_the_obvious_fix_before_reporting_it_as_the_fix).
Also corrects the pages-deploy comment in ci.yml, which stated the superseded-run
mechanism this evidence refutes.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC2jVn8Au7E9JPkw6bwXXH
Edward Langley
3f97dfae8e