Does an Actions lockfile prove that a workflow dependency is safe?
No. A lockfile makes dependency resolution more reproducible and resists a tag moving to different code, but it does not review the pinned source, detect vulnerabilities, or establish that an action is trustworthy.
Answered in
GitHub Actions Lockfiles Pin the Workflow, Not Its Good IntentionsGitHub's Actions lockfile preview pins workflow dependencies, including nested actions. It improves integrity but cannot tell you whether code is safe.
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