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Harness Engineering: The Part of the Agent That's Actually Yours

This story is from 2026-08-29. It is preserved in the archive; the latest stories are on the live feed.

Two years of building agents, and almost every fix that held was outside the model. My agent did something dumb, so I went looking at the model. Benchmarks, leaderboard position, public opinion on Twitter. What actually fixed things was boring: a reranker, a retry ladder, a state schema, a gate in…

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  1. 2026-08-29 23:43 · DEV Community — Machine Learning
    Harness Engineering: The Part of the Agent That's Actually Yours

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