Anthropic just dropped a two-hour deep-dive on building Claude agents, led by the engineer who actually writes Claude Code. You start by wiring up an agent that runs itself without any hand-holding. It gets terminal access so it can execute commands, parse outputs and adjust on the fly. Memory lives in your file system, not some opaque cache, and you’ll learn hooks that catch and kill hallucinations before they spread. Next up, you’ll see how to bolt a Claude agent onto a large codebase without blowing everything up. They walk you through setting up isolated environments, orchestrating tasks across multiple files and handling edge cases when your code or data grows. The course doesn’t gloss over failures: you’ll watch concrete examples of agents tripping over missing dependencies or misreading logs, then learn how to harden your pipelines so those mistakes vanish. By the end you’ll be using Claude like a pro—scripting deployments, automating bug hunts, even packaging your own agent-powered service. Anthropic pitches it as a single source for both beginners and veterans, claiming it’s worth more than any $500 class you almost bought. If you want hands-on agent engineering, this is the most detailed free resource you’ll find.