[BUG] Claude Ghostly cmnd+c

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?

Version 2.1.112 worked with cmnd+c and claude fullscreen in ghostly. When the 2.1.126 update landed it stopped. It will _start working_ mid session but is not able to persist.

What Should Happen?

cmnd+c should copy to clipboard.

Error Messages/Logs

Steps to Reproduce

Mac OS 26.2 (25C56) and Ghostly https://github.com/ghostty-org/ghostty/commits/332b2aefc

Claude 2.1.126 (latest) with fullscreen or 2.1.118 (stable) with fullscreen. Add / remove the "hack" to pass cmnd+d. Cannot copy to clipboard with 2.1.126. Downgrade to 2.1.112 and cmnd+c does work.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.112

Claude Code Version

$ claude --version 2.1.126 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

Additional details:

• Ghostty version: 1.3.1 (stable)
• Claude Code setting: "tui": "fullscreen"
• Cmd+C works normally in a plain Ghostty shell — only breaks inside Claude Code fullscreen mode
• Setting clipboard-read = allow in Ghostty config briefly restored Cmd+C on hot-reload (Cmd+Shift+Comma) but did not persist across Ghostty restart
• Ghostty's default clipboard-read = ask may conflict with Claude Code's OSC 52 clipboard handling in fullscreen — the ask prompt is invisible in fullscreen mode
• Claude Code fullscreen uses the Kitty keyboard protocol, which Ghostty supports — the protocol negotiation appears to be where copy breaks