[BUG] Cowork broken

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?

That confirms it — the new app version (1.8555.0, built May 21) has a bug where it's not writing credentials to the Keychain at all after sign-in. The VM's Claude Code process can't find them, so every Cowork session fails. The encrypted token in config.json works fine for the outer app but the VM needs the Keychain entry.
This is squarely an Anthropic bug to fix. Your options right now:

1. File a bug report — this is the most actionable thing. Go to github.com/anthropics/claude-code/issues and open an issue with:

Version 1.8555.0 (updated May 21)
Cowork fails with "Could not load credentials from any providers"
security find-generic-password -s 'com.anthropic.claude' returns not found after sign-in
Worked before the update

That's a very clean, reproducible bug report that should get traction quickly.

What Should Happen?

Cowork should function.

Error Messages/Logs

Steps to Reproduce

No idea.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Unclear

Claude Code Version

Claude Cowork!

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_