[BUG] Extension fails to activate on Windows - hardcoded Linux path in extension.js

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. All extension commands (claude-vscode.editor.openLast, claude-vscode.sidebar.open, claude-vscode.editor.open) are not registered and throw "command not found" errors. The Extension Host log shows the extension fails to load due to a hardcoded Linux path inside extension.js.

What Should Happen?

The extension should activate successfully and all commands should be available in the Command Palette.

Error Messages/Logs

2026-02-24 14:57:03.374 [error] Activating extension Anthropic.claude-code failed due to an error:
2026-02-24 14:57:03.374 [error] TypeError: The argument 'filename' must be a file URL object, file URL string, or absolute path string. Received 'file:///home/runner/work/claude-cli-internal/claude-cli-internal/build-agent-sdk/sdk.mjs'
	at Module.createRequire (node:internal/modules/cjs/loader:1915:13)
	at Object.<anonymous> (c:\Users\ysingmie\.vscode\extensions\anthropic.claude-code-2.1.51-win32-x64\extension.js:45:4602)

Steps to Reproduce

1. Install Claude Code extension v2.1.51 on Windows 10
2. Open VS Code
3. Try any Claude Code command from Command Palette (e.g. "Claude Code: Open in New Tab")
4. Error "command not found" appears
5. Check View > Output > Extension Host log to see activation failure

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

VS Code 1.109.5

Claude Code Version

2.1.51

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_