Pin GitHub Actions to full-length commit SHAs#88
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Replace mutable major-version tags on external actions with verified full-length commit SHAs from official upstream repositories to mitigate supply-chain risk. Each pin stays within the same major version, so workflow behavior is preserved. - actions/checkout@v4 -> 34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1 - biomejs/setup-biome@v2 -> 4c91541eaada48f67d7dbd7833600ce162b68f51 # v2.7.1 (annotated tag, peeled commit) - actions/setup-node@v4 -> 49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0 - actions/upload-artifact@v4 -> ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
miguelcalderon
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vladimir-tikhonov-nutrient
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Context: https://pspdfkit.slack.com/archives/C03LUSTQYTF/p1780907940938109?thread_ts=1780905830.180029&cid=C03LUSTQYTF
Summary
Remediates GitHub Actions supply-chain risk by replacing mutable major-version tags on external actions with verified full-length commit SHAs resolved from each action's official upstream repository.
Each pin stays within the same major version that was previously floating, so no major-version upgrade occurs and workflow behavior is preserved.
Actions pinned
actions/checkout@v434e114876b0b11c390a56381ad16ebd13914f8d5v4.3.1biomejs/setup-biome@v24c91541eaada48f67d7dbd7833600ce162b68f51v2.7.1actions/setup-node@v449933ea5288caeca8642d1e84afbd3f7d6820020v4.4.0actions/upload-artifact@v4ea165f8d65b6e75b540449e92b4886f43607fa02v4.6.2Files changed
.github/workflows/biome.yml—actions/checkout,biomejs/setup-biome.github/workflows/playwright.yml—actions/checkout,actions/setup-node,actions/upload-artifactactions/checkoutappeared in both workflows and was pinned to the same SHA in each.Verification
Tags/SHAs resolved via
git ls-remote --tags https://github.com/<owner>/<repo>.gitagainst the official upstream repositories. Thesetup-biometag is annotated, so the peeledrefs/tags/v2.7.1^{}commit was pinned rather than the tag-object SHA.🤖 Generated with Claude Code