[BUG] OAuth session expires mid-session with 401, /login doesn't reliably refresh

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?

Description

Claude Code v2.1.126 + Claude Pro — OAuth session expires during active sessions and returns 401 for ALL commands, including /login itself and the /bug feedback mechanism.

What Should Happen?

Running claude code in my console

Error Messages/Logs

Please run /login · API Error: 401
   {"error":{"type":"authentication_error","message":"Invalid authentication credentials"}}
4. Running `/login` again sometimes succeeds temporarily but token expires again shortly after

Steps to Reproduce

Steps to Reproduce

1. Authenticate via /login (Pro subscription, OAuth flow)
2. Use Claude Code normally for 10-20+ minutes
3. Eventually all commands return:

Please run /login · API Error: 401
{"error":{"type":"authentication_error","message":"Invalid authentication credentials"}}

1. Running /login again sometimes succeeds temporarily but token expires again shortly after
2. /bug feedback command also returns 401, making it impossible to report from within CLI

Expected

• Session stays alive during active use, or /login reliably refreshes token
• Feedback mechanism works even with expired auth

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

macOS · Claude Code v2.1.126 · Sonnet 4.6 · Claude Pro subscription

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_