[BUG] Ctrl+C and Ctrl+Shift+C silently clear prompt input with no confirmation or recovery

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 prompt input buffer is non-empty, pressing either Ctrl+C or Ctrl+Shift+C silently discards the entire buffer. There is no confirmation, no echo to scrollback, no warning, and no way to recover what was typed. A single accidental keypress destroys arbitrarily large amounts of carefully composed work.

Both keystrokes are strong muscle-memory copy shortcuts:

• Ctrl+C is the universal copy shortcut in GUI applications.
• Ctrl+Shift+C is the standard copy shortcut in many terminals (gnome-terminal, Konsole, Windows Terminal) and is also the browser devtools "select an element" shortcut.

Users reach for one or the other reflexively, expecting a copy - or mistake which window has focus - and lose their work instead.

What Should Happen?

A non-empty input buffer must never be cleared without confirmation. Acceptable forms of confirmation:

• An inline prompt ("Discard N lines? y/N"), or
• A repeat-press confirmation: a single press shows a warning hint, only a second press within a short window commits the clear.

After the clear, the action must be undoable via Ctrl+Z, and an onscreen hint at the moment of clearing must say so (e.g. "Input cleared — press Ctrl+Z to restore"). Without the hint the undo is undiscoverable.

The two requirements pair: confirmation prevents accidents the user notices in time; undo plus hint catches the ones that slip through.

Error Messages/Logs

None. The clear is silent — no error, no warning, no echo of the discarded content.

Steps to Reproduce

1. Open Claude Code in any standard terminal.
2. Type several lines into the prompt — enough that retyping would be costly.
3. With no text selected, press Ctrl+C. (Alternatively, Ctrl+Shift+C.)
4. Observe: the input buffer is cleared. Typed content is gone. No confirmation, no echo, no recovery.

Reproduced in Windows Terminal, cmder, and the integrated terminal of a JetBrains IDE.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.142 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Related existing issues (different destructive targets, same class of bug — destructive keybinding with no confirmation):

• #55590
• #52377