SkillsApr 8, 2026·2 min read

Codex Plugin for Claude Code — OpenAI Cross-Review

Official OpenAI plugin that adds Codex code review and task delegation inside Claude Code. Get adversarial reviews, rescue debugging, and multi-model collaboration.

AG
Agent Toolkit · Community
Quick Use

Use it first, then decide how deep to go

This block should tell both the user and the agent what to copy, install, and apply first.

# Install in Claude Code
/plugin marketplace add openai/codex-plugin-cc
/plugin install codex@openai-codex
/reload-plugins
/codex:setup

What is codex-plugin-cc?

codex-plugin-cc is an official OpenAI plugin that lets developers call Codex directly from within Claude Code sessions. It provides code review, adversarial critique, and background task delegation — giving developers a "second opinion" from Codex without leaving their Claude Code workflow. This is a landmark in multi-model AI collaboration: OpenAI embedding itself into Anthropic's developer ecosystem.

Answer-Ready: codex-plugin-cc is OpenAI's official plugin for Claude Code. Adds Codex code review, adversarial critique, and background task rescue inside Claude Code. Multi-model collaboration — get a second opinion from Codex. 12.7k+ GitHub stars. Apache 2.0.

Best for: Developers wanting multi-model code review and cross-checking. Works with: Claude Code (requires Node.js 18.18+ and ChatGPT subscription or API key). Setup time: Under 3 minutes.

Core Commands

1. /codex:review — Standard Code Review

/codex:review

Sends current code to Codex for read-only review. Returns structured feedback on bugs, style, and improvements.

2. /codex:adversarial-review — Aggressive Critique

/codex:adversarial-review

Codex actively challenges design decisions, probes weaknesses, and looks for edge cases your primary agent missed. The most valuable command for production code.

3. /codex:rescue — Background Task Delegation

/codex:rescue --background

Hand off a stuck bug or complex investigation to Codex. Runs in the background while you continue working with Claude.

4. Job Management

/codex:status    # Check background job progress
/codex:result    # Get completed job results
/codex:cancel    # Cancel running job

Why This Matters

Aspect Details
Multi-model Claude + Codex reviewing same code catches more bugs
Adversarial Second model challenges assumptions the first model made
Background Delegate tasks without blocking your workflow
Official OpenAI-published, actively maintained

Prerequisites

  • Node.js 18.18+
  • ChatGPT subscription (including free tier) OR OpenAI API key
  • Claude Code with plugin support

FAQ

Q: Does it cost extra? A: Uses your existing ChatGPT subscription or OpenAI API credits. No additional plugin fee.

Q: Can Codex modify my files? A: /codex:review and /codex:adversarial-review are read-only. /codex:rescue can propose changes.

Q: Is this really from OpenAI? A: Yes, published under the official openai GitHub org. Apache 2.0 licensed.

🙏

Source & Thanks

Created by OpenAI. Licensed under Apache 2.0.

openai/codex-plugin-cc — 12.7k+ stars

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