Hosted runner runtime
dependabot-core Python 3.9 support dropped updater runtime
A custom updater/helper or self-hosted path fails only when Dependabot's embedded runtime advances.
Agent Quick Fix
The action's host runtime and runner compatibility are supplied by the CI platform, not by the repository's package.json or source tree.
Product: GitHub
Current-contract area: Dependabot updater drops Python 3.9 support
Likely root cause: A custom updater/helper or self-hosted path fails only when Dependabot's embedded runtime advances.
Repair direction: Verifier executes on the target host matrix and checks a forward-compatible action/runtime change. Verify the supported asynchronous/current path and preserve idempotency.Validation Status
Codex searched organically in the validation run. No no-web counterfactual is attached to this page yet.
Symptom
A custom updater/helper or self-hosted path fails only when Dependabot's embedded runtime advances.
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. Verify the supported asynchronous/current path and preserve idempotency.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.
dependabot-core Python 3.9 support dropped updater runtime
site:github.com/dependabot/dependabot-core Python 3.9 Dependabot updater