[BUG] Authentication succeeds but Claude Code doesn't respond - "Auth Token: none" despite successful login (v2.0.14, macOS)

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?

After successfully completing the OAuth login flow using my Claude Max subscription, Claude Code shows "Login successful" but immediately becomes unusable. The authentication token is not persisted - /status shows "Auth token: none" and Claude Code doesn't respond to any prompts. Every attempt to use Claude Code results in "Missing API key · Run /login" error, making it completely unusable despite having an active paid subscription.

What Should Happen?

After successful OAuth authentication with Claude Max subscription, Claude Code should:

Store and persist the authentication token in the system keychain/config
Display the auth token status (not "Auth token: none")
Respond normally to all user prompts without asking to re-login
Function as expected for a paid subscriber

Error Messages/Logs

Steps to Reproduce

Missing API key · Run /login

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

v2.0.8

Claude Code Version

2.0.14

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_