@nate_51214 Lectures and 8 hands-on projects make up this free Harness Engineering course on GitHub. The curriculum breaks down harness designs for Claude Code, Codex, and DeepSeek while tackling loop and graph engineering plus automated agent loops. You also get observability, testing, and verification covered as a practical method for learning to build coding agent environments. The whole thing runs under an MIT License and the repo link is in the thread below.
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