Build Your Own Coding Agent

Course overview

Build a coding agent in pure Python. No LangChain or vector DBs. Orchestrate Claude, DeepSeek, or Ollama with raw HTTP requests. Test everything with FakeBrain and pytest. Includes full source code and a capstone where the agent builds a Snake game autonomously.

18 chapters
Begin reading
Download
The Book

Build Your Own Coding Agent18 chapters

Begin
  1. Preface

  2. Part I: The Brain

  3. Chapter 1: The Zero Magic Manifesto

  4. Chapter 2: The Raw Request

  5. Chapter 3: The Infinite Loop

  6. Chapter 4: The Universal Adapter

  7. Part II: The Hands

  8. Chapter 5: The Tool Protocol

  9. Chapter 6: The Scratchpad (Memory)

  10. Chapter 7: The Safety Harness (Plan Mode)

  11. Chapter 8: The Context Pipeline (Map & Search)

  12. Chapter 9: The Reality Check (Running Code)

  13. Part III: The Frontier

  14. Chapter 10: Going Dark (Local Models)

  15. Chapter 11: The Extension (Web Search)

  16. Chapter 12: The Capstone (Building a Game)

  17. Appendix A: Streaming Responses

  18. Acknowledgments