[BUG] "Fork Conversation from here" doesn't work

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?

"Fork Conversation from here" option doesn't work with

• Visual Studio Code : Version: 1.107.1 (Universal)
• Claude Code for VS Code : Version 2.1.84

Rest of the functionality is working fine.

What Should Happen?

"Fork Conversation from here" option should ideally open another pane with appropriate chat history forked at the right place.

Error Messages/Logs

No Error logs seen in the UI

Steps to Reproduce

Claude Code for VS Code extension with above mentioned versions and try "Fork Conversation from here" option.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.84

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_