Learn Harness Engineering — A Complete Practical Guide

Repo: github.com/walkinglabs/learn-harness-engineering · Sanbu (@sanbuphy) Tweet: April 2, 2026 — 298 likes · 447 bookmarks Category: Tutorial / Resource

Overview

Sanbu compiled a comprehensive Harness Engineering learning guide that strictly follows the original materials from OpenAI and Anthropic.

The entire course is project-driven, covering core areas including environment setup, state management, and validation control. It includes both detailed explanations and practical templates and resource libraries. Documentation and project templates are all in the repo, ready for hands-on practice.

Structure

Core modules covered:

Environment Setup — How to design an agent's working environment
State Management — Context, memory, session state
Validation Control — Testing, linting, automated checks
Tool Integration — Tool orchestration from CLI to API
Project Templates — Ready-to-use starter templates

Why It Matters

If you want to learn Harness Engineering from scratch, this repo is one of the best starting points. Its value lies in:

Based on official sources — Not second-hand interpretation, but directly derived from OpenAI and Anthropic's original documentation
Project-driven — Not just concept explanations, but runnable templates
Continuously updated — Active community