Pin GitHub Actions to commit SHAs#28
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What changed
Pinned the external GitHub Actions used by
.github/workflows/tests.ymlto verified full-length commit SHAs while preserving# v4comments for human-readable release context.Why
Mutable action refs such as
@v4can move without any repository change. Pinning to commit SHAs reduces the supply-chain risk from moved tags or compromised upstream action repositories.Validation
Verified each upstream
v4tag withgit ls-remote --tagsagainst the official action repositories.pnpm/action-setup@v4is an annotated tag, so the workflow pins the peeled commit fromrefs/tags/v4^{}. Also checked that no remaining workflowuses:refs point at mutable refs and rangit diff --check.pnpm exec actionlintcould not run locally because the repository does not configure a pnpm version for the active local tool manager.