Modifier keys behave incorrectly in VS Code + WSL terminal when chatting with Codex

What version of Codex CLI is running?

codex-cli 0.115.0

What subscription do you have?

plus

Which model were you using?

_No response_

What platform is your computer?

_No response_

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

VSCode

What issue are you seeing?

CapsLock and Shift behave incorrectly in VS Code + WSL terminal when chatting with Codex

• Windows 11
• VS Code
• WSL Ubuntu via VS Code
• Terminal chat with Codex

This issue currently only appears in this environment.

What steps can reproduce the bug?

1. Open VS Code on Windows 11
2. Connect to WSL Ubuntu
3. Open the integrated terminal
4. Start chatting with Codex
5. Try:

• CapsLock off + letter
• CapsLock off + Shift + letter
• CapsLock on + letter
• CapsLock on + Shift + letter

What is the expected behavior?

### Expected behavior

• With CapsLock on, pressing a letter should input uppercase
• With CapsLock off, pressing Shift + letter should input uppercase
• Shift + Enter should insert a newline normally

### Actual behavior

• With CapsLock off, Shift + letter does not produce uppercase
• With CapsLock on, pressing a letter still does not produce uppercase
• Uppercase only works when CapsLock is on and Shift + letter is pressed

Additional information

There is also a low-probability variant where uppercase input works normally, but Shift + Enter stops working, so multiline input is not possible. This is not reproducible reliably yet, but it may be related to the same modifier-key handling issue.