[BUG] VS Code extension fails to activate on Windows - hardcoded Linux path

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?

VS Code extension fails to activate on Windows.
Developer Tools console shows:

Activating extension 'Anthropic.claude-code' failed:
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'

The path is hardcoded as a Linux path and does not work on Windows.

What Should Happen?

The VS Code extension should activate successfully on Windows and the Claude Code panel should be usable.

Error Messages/Logs

Activating extension 'Anthropic.claude-code' failed: 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'

Steps to Reproduce

1. Install Claude Code VS Code extension (v2.1.129) on Windows 11
2. Install Claude CLI via npm
3. Open VS Code
4. Open Developer Tools (Help > Toggle Developer Tools)
5. See error in Console tab

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.101 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

VS Code version: 1.118.1
Extension version: 2.1.129
Claude CLI version: 2.1.101

Claude CLI works fine from command line (claude --version outputs correctly).
The extension panel shows "CLAUDE CODE" tab but displays "No active session".
Changing "Claude Process Wrapper" setting to the npm path did not resolve the issue.