### Summary * Use `https://github.com/Homebrew/homebrew-cask/blob/main/Casks/c/codex.rb` to get the latest available version for brew usage.
Instead of printing characters before booting the app, make the upgrade banner a history cell so it's well-behaved. <img width="771" height="586" alt="Screenshot 2025-10-16 at 4 20 51 PM" src="https://github.com/user-attachments/assets/90629d47-2c3d-4970-a826-283795ab34e5" /> --------- Co-authored-by: Josh McKinney <joshka@openai.com>
Adds an update prompt when the CLI starts: <img width="1410" height="608" alt="Screenshot 2025-10-14 at 5 53 17 PM" src="https://github.com/user-attachments/assets/47c8bafa-7bed-4be8-b597-c4c6c79756b8" />