[BUG] React Error #300 crashes VS Code Claude extension when sending messages

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?

I'm experiencing a crash in the Claude Code VS Code extension (version 2.0.75) when sending chat messages. Steps to Reproduce:

1. Open the Claude Code extension in VS Code
2. Send a message in the chat
3. The extension crashes immediately with a React error

Environment:

• VS Code Extension Version: 2.0.75 (was recently updated from unknown version)
• OS: macOS (Darwin 24.5.0)
• Frequency: Occurs randomly after sending messages, happened multiple times

Additional Information:

• The crash appears to be related to React component rendering
• No additional error logs available from extension logs
• This is a blocking issue preventing normal usage of the extension

What Should Happen?

Expected Behavior: The message should be processed normally without crashing Actual Behavior: VS Code crashes with React Error 300 when attempting to send a message

Error Messages/Logs

React Error 300

Steps to Reproduce

1. Open the Claude Code extension in VS Code
2. Send a message in the chat
3. The extension crashes immediately with a React error

Claude Model

Other

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.74

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

• The crash appears to be related to React component rendering
• No additional error logs available from extension logs
• This is a blocking issue preventing normal usage of the extension