[BUG] Regression: "command 'claude-vscode.editor.openLast' not found" returns in v2.1.53 and v2.1.55 (fixed in v2.1.52)

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 fails to activate on Windows 11, producing the error command 'claude-vscode.editor.openLast' not found. This was fixed in v2.1.52 but has regressed in both v2.1.53 and v2.1.55. Downgrading to v2.1.52 restores full functionality.

What Should Happen?

Clicking the Claude Code icon in the VS Code activity bar should activate the extension and open the Claude Code panel. All claude-vscode.* commands should register and function normally, as they do in v2.1.52.

Error Messages/Logs

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

Steps to Reproduce

1. Install Claude Code VS Code extension v2.1.55 (or v2.1.53) on Windows 11
2. Open VS Code
3. Click the Claude Code icon in the activity bar
4. Observe error: command 'claude-vscode.editor.openLast' not found
5. Downgrade to v2.1.52 via Extensions → "Install Another Version..."
6. Restart VS Code — extension activates and works correctly

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

v2.1.52

Claude Code Version

2.1.55 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

<img width="546" height="65" alt="Image" src="https://github.com/user-attachments/assets/ce1b2404-94e2-44af-a895-31acf052fcea" />

<img width="361" height="284" alt="Image" src="https://github.com/user-attachments/assets/459cebc3-44c7-444b-8b00-16cc1fad06c2" />