codex at least once to confirm Codex starts correctly.
1. Check Node.js
2. Install Codex CLI
3. Initialize Codex
Environment setup
Codex CLI installation
Install Codex CLI
Codex CLI requires Node.js and npm. After installation, run
If version numbers appear, Node.js and npm are installed.
If Node.js is not installed, refer to the Node.js installation guide, then run the checks again.
Check the installed version:
If the Codex chat UI, model information, or command hints appear, the installation succeeded.