Every time update the Code CLI, the old packages still remained.

What version of Codex CLI is running?

0.149.0

What subscription do you have?

Enterprise

Which model were you using?

_No response_

What platform is your computer?

MacOS

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

_No response_

Codex doctor report

What issue are you seeing?

Every time update the Codex CLI, the old packages still remained in my computer.
Every version uses nearly 300MB space of my disk.

<img width="453" height="226" alt="Image" src="https://github.com/user-attachments/assets/9b77e1af-a743-43b8-998f-8d7dc4e72a09" />

What steps can reproduce the bug?

1. Use install.sh to install an old version of Codex CLI.
2. Run codex update to update the Codex CLI.
3. see the install path ~/.codex/packages/standalone/releases, the older package and latest package both in the path.

What is the expected behavior?

Remove the older packages after new version installed.

Additional information

_No response_