Vercel's new framework for durable backend agents starts with a directory. In this hands-on session, you'll go from empty folder to running agent in under an hour. We'll cover the filesystem-first authoring model (markdown for instructions, TypeScript for tools), the runtime split between channels, harnesses, and workflows, and how to ship an agent that survives restarts, handles follow-up turns, and stays inspectable. No prior agent-building experience required.