Codex

Codex is an independent agent on PATH (codex), sharing this working tree and already authenticated. It is a second opinion, not ground truth: verify what it reports, own what it changes.

If `codex` is not installed

When codex is missing from PATH, offer to install it — ask the user for approval first, never install on your own initiative. On yes, follow the current instructions at https://developers.openai.com/codex/cli. First-run authentication is interactive — hand that step to the user. Verify with codex --version before proceeding.