[BUG] When pressing keyboard enter on numeric pad this happen: [57414;129u

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?

Include in your report:

• Terminal: Ghostty
• OS: Arch Linux (kernel 6.12.63)
• Issue: Numeric keypad Enter key produces [57414;129u instead of working
• Only occurs in Claude Code, not in normal terminal sessions

What Should Happen?

• Issue: Numeric keypad Enter key produces [57414;129u instead of working as enter

Error Messages/Logs

[57414;129u

Steps to Reproduce

## Steps to Reproduce

1. Open Ghostty terminal emulator
2. Launch Claude Code CLI (claude)
3. Press the numeric keypad Enter key (not the main Enter key)
4. Observe that the sequence [57414;129u appears in the terminal instead of the Enter key being processed

## Expected Behavior

The numeric keypad Enter key should function the same as the main Enter key - submitting input or creating a new line.

## Actual Behavior

The raw escape sequence [57414;129u is printed to the terminal instead of being interpreted as an Enter key press.

## Additional Context

• This only occurs within Claude Code, not in regular terminal sessions
• The main Enter key works correctly
• This appears to be related to Ghostty's enhanced keyboard protocol support (Kitty keyboard protocol)
• The sequence [57414;129u is the enhanced protocol encoding for the numeric keypad Enter key

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Sonnet 4.5 (model ID: claude-sonnet-4-5-20250929)

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Other

Additional Information

_No response_