Updating cdx

codex can update itself in place from the latest GitHub release.

Check for a newer version

cdx update --check

This reports whether a newer release exists and installs nothing. Add --json for machine-readable output:

cdx update --check --json
# {"current":"1.0.0","latest":"1.1.0","newer_available":true,"html_url":"..."}

Install the update

cdx update

codex downloads the release binary for your platform, verifies its SHA-256 checksum, and atomically replaces the running executable. You are asked to confirm first; pass --yes to skip the prompt (for scripts):

cdx update --yes

How it works

• The target platform is chosen automatically (Linux x86_64 → the static musl binary; macOS → the matching Apple-silicon or Intel binary).
• The download is checksum-verified before anything is replaced; a mismatch aborts without touching your installed binary.
• The new binary is written next to the current one and swapped in with an atomic rename, so an interrupted update never leaves you with a half-written cdx.

If your platform has no prebuilt release, cdx update tells you to build from source (see Installation). You can also re-run the install script at any time.