[BUG] Claude Code VS Code extension v2.1.55 - All commands return "not found" error, extension fails to activate

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?

[BUG] Claude Code VS Code extension v2.1.55 - All commands return "not found" error, extension fails to activate

What Should Happen?

Describe the bug
After installing the Claude Code VS Code extension v2.1.55, all extension commands fail with "command not found" errors. The extension appears installed but does not activate.

Errors observed

• command 'claude-vscode.editor.openLast' not found
• command 'claude-vscode.showLogs' not found
• command 'claude-vscode.terminal.open' not found

Steps to reproduce

1. Install Claude Code for VS Code extension v2.1.55
2. Open VS Code
3. Try to open Claude Code via any method (panel, command palette, sidebar)
4. All commands result in "not found" errors

Environment

• OS: Windows 11
• Claude Code CLI version: 2.1.55 (via npm)
• VS Code extension version: 2.1.55

What I tried

• Uninstalled and reinstalled the extension multiple times
• Deleted extension folder manually from .vscode/extensions
• Uninstalled and reinstalled CLI via npm
• Restarted VS Code and laptop
• Nothing resolved the issue

Expected behavior
Claude Code panel opens and functions normally.

Actual behavior
Extension installs but no commands work. Panel never opens.

Error Messages/Logs

command 'claude-vscode.editor.openLast' not found

Steps to Reproduce

Steps to reproduce

1. Install Claude Code for VS Code extension v2.1.55
2. Open VS Code
3. Try to open Claude Code via any method (panel, command palette, sidebar)
4. All commands result in "not found" errors

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.55

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

<img width="1394" height="1090" alt="Image" src="https://github.com/user-attachments/assets/102ac00f-4f33-497a-a69e-4a1568cb0f69" />