anthropics/anthropic-sdk-go ? reverse-engineered prompt

Build me a Go SDK for Anthropic’s Claude API that feels easy to use in a normal Go app.

I want to be able to create a client with an API key, send chat style messages, pick a model, set token limits, and get back the assistant response in a clean typed way. It should also handle the other common API pieces like message batches, files, models, usage info, and webhooks, plus any beta features that are part of the API. Please make it feel polished, with good error handling, clear examples, and tests so it’s reliable.

If you need to check the latest API details or edge cases, look up the current docs online and follow them closely.