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Completes the no-per-PR-OCI-builds intent: image-off-pr moved image.yaml off PRs and TraceMachina#2877 moved the nix integration job off PRs, but main.yaml's integration-tests (docker-compose image build + run_integration_tests.sh) fell between them and still ran on every PR. Defer to nightly + merge-to-main, matching TraceMachina#2880's pattern. Fork-local until folded into the upstream OCI/nightly set.
`try_subscribe` stopped at the first exact unique-qualifier match, even when that match was a completed record. The unique-qualifier index retains completed records alongside any live successor, and the backend does not order results by state, so a retained completed record could be returned ahead of a joinable live one — forcing an unnecessary recreate and a new operation instead of joining the live successor. Scan every exact match and prefer a joinable (neither finished nor abandoned) candidate, keeping the first exact match only as a fallback. This is the selection half of finding N7. The atomic qualifier->live-op claim (two concurrent same-qualifier submissions can still both create an operation) needs a store primitive that does not exist today (a compare-and-set on the shared qualifier key); that is tracked separately. Co-Authored-By: Claude Opus 4.8 <[email protected]>
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What and why
Lane A stability fix from the findings catalog (see
nativelink-findings-2026-10-05.csvon the
meta/findings-catalog-2026-10-05branch), rebased onto OSS main@bf4b3aa855. This fork PR exists to validate the change on CI that is
representative of upstream PR lanes (public read-only cache, same endpoints)
before any upstream submission.
How was this verified?
The branch carries its own regression tests (fails-without where the fix
class allows it — see the branch's test commits). This PR's purpose is the
full representative CI run; green here rehearses the exact checks an
upstream PR would face.
Risk
Fork-internal validation PR; nothing lands anywhere by merging this. The
underlying fix's risk assessment happens at upstream-submission time.
AI assistance
Agent-assisted pipeline (Claude) for rebase and PR mechanics under my
direction; the fix itself carries verification in its tests.