Allow maintainers to re-trigger lint validation via a recheck label - #3530
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copybara-service[bot] merged 2 commits intoAug 11, 2026
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Workflow runs awaiting approval on fork PRs are deleted after 30 days; after that such PRs can no longer be validated or auto-labeled pull ready without a new pull_request event. Applying the recheck label fires a fresh validation run with the labeling maintainer as the triggering actor, and the Auto Label PR workflow removes the label after processing the result so it can be re-applied for another run.
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Pin actions to commit SHAs, disable credential persistence on checkout, and annotate the API-only workflow_run trigger as an accepted pattern.
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Description
Fork PRs from outside collaborators need a maintainer to approve their workflow runs, and GitHub deletes runs that sit awaiting approval for more than 30 days. Once that happens the PR has no way to run
Code Formatting & Lint Validationagain, so theAuto Label PRworkflow never fires and the PR can never receivepull ready(see #3414 and #3458, both of which aged out of their approval window and needed manual labeling).This adds a
labeledtrigger to the lint workflow, gated to a single label: applyingrecheckto a PR fires a fresh validation run on the PR delta, with the labeling maintainer as the triggering actor. The run stays in the unprivilegedpull_requestcontext (read-only token, no secrets), and every existing trigger path is unchanged.Auto Label PRremovesrecheckafter it processes the result, so the label can be re-applied whenever another run is needed.Requires the
rechecklabel to exist in the repo (create once under Issues → Labels).Type of change
Checklist
CHANGELOG.mdunder the[Unreleased]section (or the relevantcheckpoint//export/changelog).