Large language models are moving from chat windows into products: assistants that look up real data, take actions and work through multi-step tasks. Building them so that they are reliable, affordable and safe takes more than a good prompt. You need to understand the API, design tools, own or choose an agent loop, and prove with evaluations that the result works.
In this hands-on course you build a support-and-operations agent for a fictional logistics company on the Claude API. You will handle every stop reason and error, write system prompts and structured outputs, use prompt caching, implement the agent loop and the SDK Tool Runner, connect tools through the Model Context Protocol, and compare your own loop with Managed Agents and the Claude Agent SDK. Practices run in your browser against a simulator with the shape of the real SDK; labs on your own computer use the real API.
The course prepares you for Mastery Certified: AI Agent Developer (Claude), an independent certification, with a practice exam and the final project the certification requires. You finish with a documented, production-style agent: its design, tool schemas, eval plan and safety controls.