But their docs also say:

> Unless previously approved, Anthropic does not allow third party developers to offer claude.ai login or rate limits for their products, including agents built on the Claude Agent SDK. Please use the API key authentication methods described in this document instead.

Which I have interpreted means that you can’t use your Claude code subscription with the agent SDK, only API tokens.

I really wish Anthropic would make it clear (and allow us to use our subscriptions with other tools).