[BUG] Xcode authentication fails to recognize Premium Nonprofit seat despite valid assignment

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?

Premium Nonprofit seat holder on Team plan cannot authenticate with Xcode despite correct seat assignment and successful Claude Code authentication.

What Should Happen?

Log into Xcode Intelligence settings with my work email
Select ISWF organization during authentication
Error appears: "Premium seat required - For Team accounts, only Premium seats can access Claude through Xcode"

Error Messages/Logs

Xcode shows "Premium seat required" error despite valid Premium Nonprofit seat

Steps to Reproduce

Authentication should succeed since account has Premium Nonprofit seat assigned

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.138

Platform

Other

Operating System

macOS

Terminal/Shell

Other

Additional Information

Claude Code authentication works correctly with same credentials
Organization settings confirm Premium Nonprofit seat assignment
Tried logging out/in multiple times without success