Release center
Know what changed before you update.
CMT publishes release metadata, package integrity information, and update notes through the official website.
Check the current release
The application can compare its installed build with the official version manifest.
- Review version and build numbers
- Verify the package SHA-256 value
- Read behavior changes before installation
Update safely
Back up important local data and close running Codex windows before maintenance-sensitive updates.
- Keep the previous package until validation is complete
- Run the health check after updating
- Confirm your backup and retention settings remain correct
When an update fails
Do not repeatedly overwrite a working installation without collecting evidence.
- Record the installed and attempted versions
- Export a redacted support package
- Use the previous verified package while support investigates
Release information
Version, build, date, package size, checksum, and notable behavior changes identify each published release.
- Compare the website manifest with the application
- Treat a changed checksum as a different package
- Review known limitations before deployment
Rollback evidence
If validation fails, keep enough information to return to the previous verified build safely.
- Retain the previous installer and its checksum
- Record settings or data migrations performed by the update
- Confirm the restored build with health and backup checks
Organize Codex conversations, handoffs, and backups