[BUG]

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?

CC bug — the g9H(K) call inside the REPL mount effect isn't guarded against FXK returning undefined when
enabled: false.

What Should Happen?

CC bug — the g9H(K) call inside the REPL mount effect isn't guarded against FXK returning undefined when
enabled: false.

Error Messages/Logs

Steps to Reproduce

any --resume of a session with ≥1 message on 2.1.119 crashes immediately.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

claude code 2.1.119

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_