Part 10 · 3 chapters

Capstone Projects

Theory becomes mastery through building. Each capstone combines skills from across the book into a complete, portfolio-worthy agent you build end to end.

Chapter 49Capstone Projects

Capstone 1: A Research Assistant Agent

You have learned every piece of agent building; now you put them together. The capstones are projects — complete agents you build end to end, applying the concepts from across the book. Our first capstone is a research assistant: give it a question, and it searches the web, reads sources, and produces a clear summary with citations. As we build, watch how naturally the pieces from earlier chapters click into place. The goal is not just a working agent but the satisfying realization that you already know how to make one.

⏱ 6 min✏️ 6 exercises🖼 Figures
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Chapter 50Capstone Projects

Capstone 2: A Coding Agent with MCP

Our second capstone is more ambitious and more dangerous: a coding agent that reads a codebase, makes a change, runs the tests, and reports the result — connected to real developer tools through MCP (Chapter 40), and kept safe by the guardrails of Chapter 45. Coding agents are among the most useful and most popular agents being built today, and they bring together tool use, code execution, MCP, and safety in a single project. Because this agent touches files and runs code, safety is not a footnote here; it is woven through every step.

⏱ 6 min✏️ 6 exercises🖼 Figures
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Chapter 51Capstone Projects

Capstone 3: A Multi-Agent Workflow

Here is the capstone of capstones — and the final chapter of the book. We build a small team of agents that collaborate to plan, execute, and review a real task from beginning to end. This project pulls together nearly everything you have learned: planning, the agent loop, tools, multi-agent coordination, review, and observability. If you can build and understand this, you have genuinely earned the title this book promised. We will build it step by step, and then close with a reflection on the journey from zero to here.

⏱ 6 min✏️ 6 exercises🖼 Figures
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