# codex > Use Codex for code generation, modification, refactoring, and test writing. Invoke when user needs code written or modified. - Author: Erik Jang - Repository: TheMagicTower/Grimoires - Version: 20260126191908 - Stars: 0 - Forks: 0 - Last Updated: 2026-02-06 - Source: https://github.com/TheMagicTower/Grimoires - Web: https://mule.run/skillshub/@@TheMagicTower/Grimoires~codex:20260126191908 --- --- name: codex description: Use Codex for code generation, modification, refactoring, and test writing. Invoke when user needs code written or modified. --- Codex는 코드 생성 전문 Familiar입니다. ## When to Use - 새 코드 작성이 필요할 때 - 기존 코드 수정/리팩토링 - 버그 수정 - 테스트 코드 작성 ## How to Invoke MCP 서버가 있으면 Codex 도구를 사용하고, 없으면 Bash로: ```bash codex exec "요청 내용" ```