[BUG] Claude's output is duplicated in the VS Code assistant window

[tastewar-mt]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• I am using the latest version of Claude Code

What's Wrong?

Yesterday, Claude Code crashed at one point, and since then, Claude's output has been duplicated in the VS Code window. I have tried exiting all VS Code windows, and even shutdown and restarted my PC (Windows 11), and the problem persists. I tried opening Claude up in a new VS Code window with a new project loaded, but I am still seeing the same duplication of output.

What Should Happen?

Claude should only output its response once.

Error Messages/Logs

Steps to Reproduce

1. Start VS Code
2. Ask Claude a question in the conversation window
3. Observe the response being echoed twice.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

2.1.34

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

No response

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Conversation content duplicates 3x when code is written - scrollbar glitches (VS Code terminal) #15476
2. [BUG] Messages sent during Task agent execution are delivered twice #14253
3. [BUG] /context usage stuck at 0% breaks auto-compaction (+ output printed twice) (2.1.19) #20760

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically closed as a duplicate of #15476.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.