use-cases/refactor-your-codebase.md Codex Docs, 2026-04-17 00:44 UTC → 2026-05-01 18:29 UTC

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116## Use skills for repeatable patterns116## Use skills for repeatable patterns

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118[Skills](https://developers.openai.com/codex/guides/skills) are useful when the same cleanup rules repeat across repos, services, or teams. Use framework-specific skills when available, add security and CI skills around risky cleanups, and create a team skill when you have a proven checklist for unused-code removal, module extraction, or legacy-pattern modernization.118[Skills](https://developers.openai.com/codex/skills) are useful when the same cleanup rules repeat across repos, services, or teams. Use framework-specific skills when available, add security and CI skills around risky cleanups, and create a team skill when you have a proven checklist for unused-code removal, module extraction, or legacy-pattern modernization.

119If you end up doing the same modernization pass across more than one codebase, Codex can help turn the first successful pass into a reusable skill.119If you end up doing the same modernization pass across more than one codebase, Codex can help turn the first successful pass into a reusable skill.

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121## Related use cases121## Related use cases