[BUG] Cannot connect Claude CoWork to private Github repo

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?

Cannot connect Claude CoWork to private Github repo even though I have the GitHub Integrations connector installed, authorized and connected (see screenshot)

<img width="1351" height="829" alt="Image" src="https://github.com/user-attachments/assets/1444c676-7662-4b00-b81f-8446f8c21577" />

What Should Happen?

I would expect the connector to be visible here when starting a new task.

<img width="1357" height="832" alt="Image" src="https://github.com/user-attachments/assets/a427aa4a-34b7-470a-908f-0de94c179cc5" />

I did ask at my company's admin if GitHub was black-listed or if it need to be white-listed but they informed me that there are no blockers in place on their side.

Error Messages/Logs

Steps to Reproduce

1. Install Claude's "Engineering" plugin.
2. Click on Connectors and select "GitHub"
3. Click on "connect" and authorize Claude on GitHub
4. Return and open a new CoWork task
5. Click on the "+" sign and check the connectors. GitHub does not appear there and Claude also cannot access the GitHub repo even though it says it is connected (and has been authorized - see step 3)

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.17377.1 (2b3ab4) 2026-06-30T20:11:42.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

I see many people having reported this bug before, but it is always automatically closed after some days.
It seems though to be a real issue, so why is not being addressed?