I took apart Claude Code, OpenCode, and Pi, then turned what I learned into a free course on harness engineering The fastest way to learn harness engineering? Build Claude Code from scratch. Why har
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Harness engineering course dissecting Claude Code internals; direct hit
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The fastest way to learn harness engineering? Build Claude Code from scratch.
Why har
> Harness engineering course dissecting Claude Code internals; direct hit
I took apart Claude Code, OpenCode, and Pi, then turned what I learned into a free course on harness engineering
The fastest way to learn harness engineering? Build Claude Code from scratch.
Why harness engineering? LangChain kept the same model and changed only the harness. Their coding agent went from 53% to 67% on Terminal-Bench, a top coding-agent benchmark. From outside the top 30 to the top 5. Same model. Better harness.
Over the past few months, I've taken apart Claude Code, OpenCode, and Pi to see how they work under the hood.
And you don't need to ship a coding agent for this to p
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