GoKawiilWelcome to Learn Harness Engineering
Learn Harness Engineering is a course dedicated to the engineering of AI coding agents. We have deeply studied and synthesized the most advanced Harness Engineering theories and practices in the industry. Our core references include:
Through systematic environment design, state management, verification, and control systems, this course teaches you how to make agentic coding tools like Codex and Claude Code truly reliable. It helps you build features, fix bugs, and automate development tasks by constraining your AI coding assistant with explicit rules and boundaries.
Get started
Choose your learning path to get started. The course is divided into theoretical lectures, hands-on projects, and a copy-ready resource library.
The Core Mechanism of a Harness
A harness doesn't "make the model smarter"; rather, it establishes a closed-loop working system for the model. You can understand its core workflow through this simple diagram:
What you will learn
Here are some of the key concepts you will master:
Constrain agent behavior with explicit rules and boundaries.
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