In this workshop we’ll build a real coding agent using the AI SDK, Vercel AI Gateway, and Vercel Sandbox. You’ll start by creating a simple agent powered by GPT-4.1-mini, then add tools that let it explore and modify a local JavaScript or TypeScript project. Step by step, we’ll teach the agent to list files, read code, and even edit or create files in response to your prompts. Along the way you’ll learn how to design reasoning loops, define stopping conditions, and manage agent state. By the end, you’ll have built a working coding agent that can understand and update its own project.