Codex Plugin for Claude Code
OpenAI just released a free plugin that puts their coding agent inside Claude Code. Here's everything you need: the research, the setup, and how to actually use it.
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If you're using Claude Code to build software, every line of code it writes is produced by a single model. That model has blind spots. The research below shows exactly what those blind spots are and why having a second model review the output catches things humans miss.
OpenAI's Codex plugin gives you that second model for free. Three commands to install, three commands to use. This guide covers the research that proves the approach, the setup, and the exact workflow.