Backspace on empty Chat input exits session — should be no-op; only /exit should quit

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?

When the Chat input is empty, pressing Backspace exits the Claude Code session immediately with no confirmation. This is destructive — the only intended exit path should be /exit. Backspace cannot be null-bound via keybindings.json without breaking normal text editing.

What Should Happen?

Expected behavior: Backspace on empty input is a no-op in the Chat context.

Error Messages/Logs

Steps to Reproduce

Backspace on an empty line,
Esc also has multiple functions, but can be disabled for exit.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code 2.1.150

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

Linux Kernel 6.14.0-37 Gnome Terminal V 3.52.0 for GNOME 46