Learn Harness Engineering

Learn Harness Engineering is a course that teaches how to build reliable AI coding agents through systematic environment design, state management, and control systems rather than making models inherently smarter. The curriculum covers theories and practical techniques for constraining agent behavior with explicit rules, maintaining context across long tasks, and verifying work—drawing from industry practices by OpenAI, Anthropic, and other frontier labs. It offers theoretical lectures, hands-on projects, and copy-ready templates to help developers create dependable agentic tools like Codex and Claude Code for coding tasks.