- CollectionAgent Runtime & Infrastructure
- Classificationagent-native
- MCPNot applicable
- Agent SkillUnavailable
- InterfacesCLI · http
What it does
The Codex plugin for Claude Code lets a Claude Code session invoke OpenAI Codex for read-only reviews, adversarial design review, and delegated rescue work (investigate, patch, resume threads) without leaving the Claude Code workflow. It exposes slash commands (/codex:review, /codex:adversarial-review, /codex:rescue, /codex:status, /codex:result, /codex:cancel, /codex:setup) and registers a Codex subagent for handoffs.
Background jobs integrate with status/result/cancel so an orchestrating agent can run long Codex tasks asynchronously. An optional review gate (/codex:setup --enable-review-gate) hooks Claude’s stop flow to a targeted Codex review before completion.
Agent-facing interfaces
- Interaction pattern: Extension / Plugin (Claude Code marketplace plugin wrapping local Codex CLI + app server)
- Catalog protocols: CLI, http
- MCP: ⚠️ Not applicable — this is a Claude Code plugin that drives the local Codex CLI and Codex app server. It is not itself an MCP server.
- Agent Skill: ⚠️ Not yet published as a standalone SKILL.md install via npx skills add
- Onboarding type:
cli
How agents onboard
Interaction pattern: Extension / Plugin (Claude Code marketplace plugin wrapping local Codex CLI + app server)
# In Claude Code: add marketplace and install plugin (see repo README)
/plugin marketplace add openai/codex-plugin-cc
/plugin install codex@openai-codex
/reload-plugins
/codex:setup
# Optional: ensure Codex CLI is installed and signed in
npm install -g @openai/codex
# then from Claude Code: !codex login
# Typical delegation flow
/codex:review --background
/codex:status
/codex:result
# Delegate a fix or investigation to Codex (subagent)
/codex:rescue investigate why the tests started failing
See the full onboarding section in the dossier.
Protocol surface
| Interface | Detail |
|---|---|
| Claude Code plugin | Marketplace: openai/codex-plugin-cc — package codex@openai-codex |
| Slash commands | /codex:* as documented in repo README |
| Codex CLI | Global codex binary — config.toml / .codex/config.toml per Codex config |
| Codex app server | Used by the plugin for Codex integration — app server docs |