Agentic Coding - Build the Harness

This book provides a hands-on guide to building a functional, real-world AI agent harness, emphasizing practical implementation over abstract patterns. It takes you step-by-step through creating a complete, working agent loop, with safety features, verification layers, and performance evaluation, all coded in a clear human voice. Unlike many other titles that offer disconnected scripts or theoretical patterns, this book ensures you understand and own your harness from start to finish, making harness engineering an accessible and essential skill for the future.