[BUG] Terminal left in Kitty keyboard protocol mode after exit (Ghostty)

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?

After exiting Claude Code, the terminal is left in an extended keyboard encoding mode (Kitty keyboard protocol). This causes Ctrl+C to send ^[[9 instead of SIGINT, breaking normal terminal usage until a full terminal reset (printf '\ec') is performed.

Environment

• Terminal: Ghostty
• Shell: Zsh + Oh My Zsh

Workaround: printf '\ec' or wrapping the binary in a shell function that runs it on exit

What Should Happen?

Claude Code resets the keyboard protocol on exit

Error Messages/Logs

Steps to Reproduce

1. Launch claude in Ghostty
2. Exit Claude Code
3. Press Ctrl+C — outputs ^[[9 instead of interrupting

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.84

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_