Build plugin/config relocation
ESLint flat config command line flags no longer available --ext --rulesdir --resolve-plugins-relative-to
CI fails on an option that remained accepted in older majors.
Agent Quick Fix
The old package/config name is syntactically valid, but current tool packaging and discovery rules live in external release documentation.
Product: ESLint
Current-contract area: Legacy CLI option removed under flat config
Likely root cause: CI fails on an option that remained accepted in older majors.
Repair direction: Verifier checks the current package identity/config format and a real transformed output. Check the exact intended lint findings, not merely process exit 0.
Validation Status
Codex searched organically in the validation run. No no-web counterfactual is attached to this page yet.
Symptom
CI fails on an option that remained accepted in older majors.
Why This Happens
The old package/config name is syntactically valid, but current tool packaging and discovery rules live in external release documentation.
Verification
Verifier checks the current package identity/config format and a real transformed output. Check the exact intended lint findings, not merely process exit 0.
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.
ESLint flat config command line flags no longer available --ext --rulesdir --resolve-plugins-relative-to
site:eslint.org docs latest use command line interface flat config --ext no longer available
https://eslint.org/docs/latest/use/configure/migration-guide
https://eslint.org/docs/v9.x/use/configure/migration-guide#cli-flag-changes
eslint v9 migration guide CLI Flag Changes --ext
ESLint "Invalid option '--ext'" flat config no longer supported
https://eslint.org/docs/v8.x/use/configure/configuration-files-new#cli-flag-changes
site:eslint.org/docs/v8.x/use/configure/configuration-files-new CLI Flag Changes --ext flat config
Source Trail
- ESLint v10.0.0: https://eslint.org/blog/2026/02/eslint-v10.0.0-released/
- Official reference opened by Codex: https://eslint.org/docs/latest/use/configure/migration-guide
- Official reference opened by Codex: https://eslint.org/docs/v9.x/use/configure/migration-guide#cli-flag-changes
- Official reference opened by Codex: https://eslint.org/docs/v8.x/use/configure/configuration-files-new#cli-flag-changes