GitHub - openai/codex-plugin-cc: Use Codex from Claude Code to review code or delegate tasks. · GitHub

It uses the global codex binary installed in your environment and applies the same configuration. If you want to change the default reasoning effort or the default model that gets used by the plugin, you can define that inside your user-level or project-level config.toml. For example to always use gpt-5.4-mini on high for a specific project you can add the following to a .codex/config.toml file at the root of the directory you started Claude in: