Bug: VSCode extension tab gets stuck on "Thinking" after restart

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?

After closing and reopening VSCode, the previously open Claude Code tab
gets stuck showing "Thinking" indefinitely and never responds.
Previously this worked fine - conversations would persist across restarts.

Now I have to close the stuck tab and open a new one every time.

• OS: Windows 11 Pro
• Model: Opus 4.6
• VSCode Extension (not CLI)
• Thinking mode: off
• No "Past Conversations" or "Resume" option visible in the menu

What Should Happen?

After closing and reopening VSCode, the previously open Claude Code tab
gets stuck showing "Thinking" indefinitely and never responds.
Previously this worked fine - conversations would persist across restarts.

Now I have to close the stuck tab and open a new one every time.

• OS: Windows 11 Pro
• Model: Opus 4.6
• VSCode Extension (not CLI)
• Thinking mode: off
• No "Past Conversations" or "Resume" option visible in the menu

Error Messages/Logs

Steps to Reproduce

After closing and reopening VSCode, the previously open Claude Code tab
gets stuck showing "Thinking" indefinitely and never responds.
Previously this worked fine - conversations would persist across restarts.

Now I have to close the stuck tab and open a new one every time.

• OS: Windows 11 Pro
• Model: Opus 4.6
• VSCode Extension (not CLI)
• Thinking mode: off
• No "Past Conversations" or "Resume" option visible in the menu

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.56

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_