Update Codex and check its version
getting started
// what it does
codex update checks for and applies a newer release; codex --version (short -V) prints the running build. An npm install upgrades with npm install -g @openai/codex@latest instead. If something is misconfigured, codex doctor generates a read-only diagnostic report without starting a session.
// shell
$ codex update$ codex --version$ codex doctor