GitHub Actions Node 24 JavaScript actions runner runtime node20 native loader incompatibility

Validation Status

Codex searched organically in the validation run. No no-web counterfactual is attached to this page yet.

Symptom

The action worked under Node 20 but crashes before user steps with a native/loader incompatibility.

Why This Happens

The action's host runtime and runner compatibility are supplied by the CI platform, not by the repository's package.json or source tree.

Verification

Verifier executes on the target host matrix and checks a forward-compatible action/runtime change. Check the supported runner/runtime matrix, not just a local Node invocation.

Common Wrong Fixes

• Changing local code without checking the current external contract.
• Retrying the same install, build, or API call with no version/source change.
• Applying a broad unsafe bypass when a narrow compatibility fix is available.

Codex Search Keywords

These are the search terms observed in a neutral Codex validation run for this failure shape.

GitHub Actions Node 24 JavaScript actions runner runtime node20 native loader incompatibility
site:github.blog changelog GitHub Actions node24 runtime actions/checkout node24
GitHub Actions runner Node 24 JavaScript actions force Node 24 runtime native module loader error
https://docs.github.com/en/actions/sharing-automations/creating-actions/metadata-syntax-for-github-actions

Source Trail

GitHub source file/reference:

• GitHub source file or repository reference: https://docs.github.com/en/actions/sharing-automations/creating-actions/metadata-syntax-for-github-actions

• Deprecation of Node 20 on GitHub Actions runners: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
• GitHub source file or repository reference: https://docs.github.com/en/actions/sharing-automations/creating-actions/metadata-syntax-for-github-actions