Harness Engineering 101: The LLM is the brain, the harness is the body
Summary
Harness Engineering 101 describes building AI agents from first principles, framing the LLM as the brain and the harness as the body. It presents a 16-chapter progression that expands a toy agent in Python and ties to open-source work. The repository pages provide reading order, licensing, and practical guidance for implementing AI agent architectures.