[BUG] npm install shows "installMethod is native" warning on Windows

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?

When installing Claude Code via npm on Windows, the CLI displays a warning:

"installMethod is native, but claude command not found at C:\Users\<username>\.local\bin\claude.exe"

This occurs even though the installation was done via npm, not the native installer. The npm package incorrectly checks for the native install path regardless of installation method.

Steps to reproduce:

1. Uninstall any existing Claude Code installation
2. Delete ~/.claude directory to ensure clean state
3. Run: npm install -g @anthropic-ai/claude-code
4. Run: claude

Expected: No warnings, since npm installation doesn't use .local\bin
Actual: Warning about missing native install path

Version: 2.0.76
OS: Windows 11
Installation method: npm

What Should Happen?

No warnings, since npm installation doesn't use .local\bin

Error Messages/Logs

"installMethod is native, but claude command not found at C:\Users\<username>\.local\bin\claude.exe"

Steps to Reproduce

Steps to reproduce:

1. Uninstall any existing Claude Code installation
2. Delete ~/.claude directory to ensure clean state
3. Run: npm install -g @anthropic-ai/claude-code
4. Run: claude

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.76

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="2295" height="674" alt="Image" src="https://github.com/user-attachments/assets/32dcc71f-fbd3-4439-99dc-2994cfc45d5f" />