OpenAI Ships a Codex Plugin for Claude Code

OpenAI released an official Codex plugin that runs inside Claude Code, giving developers slash commands like /codex:review, /codex:adversarial-review, and /codex:rescue for delegating bug investigation and fixes to Codex without leaving their Claude Code session. The plugin wraps the local Codex binary and app server, requires Node 18.18+ and an OpenAI API key or ChatGPT subscription. It already has 5,500 stars and 258 forks in its first day. OpenAI building a first-party integration for a competitor's coding agent is a notable move - it treats Claude Code as a distribution channel rather than just a rival. The plugin ecosystem for AI coding tools is starting to resemble the browser extension wars, where presence everywhere matters more than exclusivity.