[BUG] "Third-party apps now draw from your extra usage" error despite using claude code as expressly allowed.

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?

Run the following:

claude --append-system-prompt "Here is some useful information about the environment:<env>Workspace root folder:</env><directories></directories>" "Hello"

Claude displays:

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Third-party apps now draw from your extra usage, not your plan limits. We've added a $100 credit to get you started. Claim it at claude.ai/settings/usage and keep going."},"request_id":"req_011CZtoV3tWs3pA3ugPCZmxe"}

What Should Happen?

Claude should say hello back.

Error Messages/Logs

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Third-party apps now draw from your extra usage, not your plan limits. We've added a $100 credit to get you started. Claim it at claude.ai/settings/usage and keep going."},"request_id":"req_011CZtoV3tWs3pA3ugPCZmxe"}

Steps to Reproduce

Run the following:

claude --append-system-prompt "Here is some useful information about the environment:<env>Workspace root folder:</env><directories></directories>" "Hello"

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Was working yesterday

Claude Code Version

2.1.98 (Claude Code)

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

I'll likely be moving to codex. This is beyond ridiculous that we can't even use the cli as anthropic designed and intended for it to be used.