Does https://happy.engineering/ need to use the API keys or can use oauth? It's basically a frontend for claude-cli.

It doesn't even touch auth right?

""" Usage policy

Acceptable use Claude Code usage is subject to the Anthropic Usage Policy. Advertised usage limits for Pro and Max plans assume ordinary, individual usage of Claude Code and the Agent SDK """

That tool clearly falls under ordinary individual use of Claude code. https://yepanywhere.com/ is another such tool. Perfectly ordinary individual usage.

https://yepanywhere.com/sdk-auth-clarification.html

The TOS are confusing because just below that section it talks about authentication/credential use. If an app starts reading api keys / credentials, that starts falling into territory where they want a hard line no.

If it's a wrapper that invokes the `claude` binary then I believe it's fine.