[BUG] VS Code Extension hangs indefinitely - process spawns but never registers IDE lock or responds (macOS)

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?

The Claude Code VS Code extension intermittently hangs indefinitely after sending a message. The spinner shows but no response ever arrives or arrives after 8+ minutes. The CLI works correctly at all times.

What Should Happen?

Claude should respond to the message within a few seconds.

Error Messages/Logs

Indefinitely hangs
<img width="1915" height="1251" alt="Image" src="https://github.com/user-attachments/assets/af9240c0-97c7-49b2-8950-717f001fff87" />

Steps to Reproduce

When the Claude Code IDE is open in VS Code and I reload VS Code, the Claude Code extension hangs during startup. VS Code gets stuck on the initial loading screen until I manually close the extension. After that, VS Code loads normally, and I can reopen the Claude Code IDE. This creates a poor user experience.

Steps to reproduce

Open Claude Code IDE in VS Code
Reload VS Code
VS Code hangs during startup

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.144

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_