[BUG] TypeError: createRequire fails with hardcoded Linux path on Windows — extension fails to activate (v2.1.51)

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 VS Code extension (v2.1.51, win32-x64) fails to activate on Windows. The sidebar shows an infinite loading state with no error surfaced to the user.

The extension.js bundle contains a hardcoded Linux CI build path that is invalid on Windows, causing the extension host to throw immediately on load.

What Should Happen?

The extension should activate successfully and the Claude Code sidebar should load normally on Windows.

Error Messages/Logs

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\<username>\.vscode\extensions\anthropic.claude-code-2.1.51-win32-x64\extension.js:45:4602)

Steps to Reproduce

1. Install the Claude Code extension v2.1.51 on Windows via VS Code marketplace
2. Open VS Code
3. Open the Claude Code sidebar (claudeVSCodeSidebarSecondary)
4. Sidebar shows infinite loading — extension never activates
5. Open Help > Toggle Developer Tools > Console to see the TypeError above

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.1.51

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_