[BUG] Ctrl-Z should not exit without warning

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

It is to easy to accidentally exit without warning - particularly after a long session, this can lead to lost context/work.

What Should Happen?

Claude should prompt for exit confirmation, default should be No.

Error Messages/Logs

Steps to Reproduce

'Accidentally' press ctrl-z after a 16hr session and see how much you need to repeat yourself to get back where you were!

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.1.119

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_