Codex CLI 0.154.0 regression: /rename submission silently fails

What version of Codex CLI is running?

codex-cli 0.154.0

What subscription do you have?

Unknown, authenticated through ChatGPT

Which model were you using?

No response

What platform is your computer?

Darwin 25.6.0 arm64 arm, macOS 26.6.2

What terminal emulator and version are you using (if applicable)?

No response

Codex doctor report

What issue are you seeing?

In Codex CLI 0.154.0, /rename opens the rename prompt and accepts a name, but submitting it produces no visible change or confirmation. The session name remains unchanged.

Relevant log:
codex_tui::bottom_pane::chat_composer: No such file or directory (os error 2)

This worked in 0.153.4 and began failing immediately after the upgrade.

What steps can reproduce the bug?

1. Start an interactive Codex CLI session.
2. Run /rename.
3. Enter a new session name.
4. Submit the name.
5. Observe that no rename occurs and no confirmation appears.

What is the expected behavior?

The session is renamed to the submitted name and Codex displays a confirmation.

Additional information

Regression range: 0.153.4 worked; 0.154.0 fails.

Reproduce the regression in Codex CLI by comparing 0.153.4 and 0.154.0 with the documented /rename steps. Start with the codex_tui::bottom_pane::chat_composer log, then verify that submitting a name changes the session name and displays confirmation without the reported error.