[BUG] Official Claude Code CLI v2.1.3 falsely flagged as third-party app on Max plan. Getting 400 error: "Third-party apps now draw from your extra usage." Using only the official CLI in VS Code terminal, no third-party tools. 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?

I have searched existing issues and this hasn't been reported yet
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This is a single bug report (please file separate reports for different bugs)
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I am using the latest version of Claude Code
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What Should Happen?

I have searched existing issues and this hasn't been reported yet
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This is a single bug report (please file separate reports for different bugs)
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I am using the latest version of Claude Code
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Error Messages/Logs

Steps to Reproduce

I have searched existing issues and this hasn't been reported yet
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This is a single bug report (please file separate reports for different bugs)
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I am using the latest version of Claude Code
*

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

I have searched existing issues and this hasn't been reported yet This is a single bug report (please file separate reports for different bugs) I am using the latest version of Claude Code *

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_