Brooks Computing Systems
Install Codex — Complete Guide
Complete guide to installing and using Codex CLI inside your development environment.
- Node.js 18+
- Terminal access
- ChatGPT account
npm
npm install -g @openai/codex
Homebrew
brew install codex
codex
Sign in when prompted.
npm i -g @openai/codex@latest
- Open repo
- Run codex
- Ask for changes
- Review output
codex "review repo" codex "fix errors" codex "add logging"
Ensure billing is active if using API workflows.
- Check Node version:
node -v - Reinstall CLI if needed
- Verify PATH includes npm global bin
