Guide to calling OpenAI Codex as a full-featured sub agent
Scanned 8/30/2026
Install to Claude Code
Skills Directorynpx -y skills add nekohasekai/my-codex-plugin --skill codex-use --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: codex-use
description: |-
Guide to calling OpenAI Codex as a full-featured sub agent
user-invocable: false
---
Codex is very affordable and fast, making it ideal for outsourcing all tasks that don't require design work.
`mcp__plugin_my-codex-plugin_codex__codex`(
`prompt`: <Input Prompt>
)
It returns a thread ID, allowing you to continue interacting after it completes (like SendMessage):
`mcp__plugin_my-codex-plugin_codex__codex-reply`(
`threadId`: <Thread ID Returned By mcp__codex__codex>
`prompt`: <Continued Prompt>
)
* Codex has been configured to read CLAUDE.md, so you don't need to add extra commands; simply use it just as you would the Claude Agent.
* MUST NOT set any parameters other than `prompt`.
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