[BUG] /install-github-action breaks my local credentials

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?

From a totally fresh claude install, locally with the latest version. I can set up claude successfully locally and it works, but then if I run /install-github-app and go through that process, it breaks my local credentials. Any message I send to claude gives me a 400 error: API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"This credential is only authorized for use with Claude Code and cannot be used for other API requests."},"request_id":"req_011CTZMpoxzT5k7Faagq1EZX"}

What Should Happen?

Claude should update the github credentials and those should work. And my local credentials should also just continue to work as they did before.

Error Messages/Logs

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"This credential is only authorized for use with Claude Code and cannot be used for other API requests."},"request_id":"req_011CTZMpoxzT5k7Faagq1EZX"}

Steps to Reproduce

From a fresh install of claude code (I uninstalled everything to try to fix it, then reinstalled it locally):

1. I enter claude: $ claude. I go through the login flow:

 Logged in as alexsquinlan@gmail.com


 Login successful. Press Enter to continue…

1. I can run commands normally.

> test

⏺ The test appears to be working correctly. Your message was received and processed successfully.

1. I run /install-github-app. Select this repo, it already has permissions, select "Skip workflow update (configure secrets only)". Select "Create a long-lived token with your Claude subscription". Authorize. Great.

1. Run any command in my local claude:

> test again.
  ⎿  API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"This credential is only authorized for use with Claude Code and cannot be used for other API requests."},"request_id":"req_011CTZMpoxzT5k7Faagq1EZX"}

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.0.128 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_