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why your ai agent fails: it is a harness problem, not a prompt problem

This story is from 2026-08-25. It is preserved in the archive; the latest stories are on the live feed.

The most common mistake in agent development is believing the prompt is the product. An agent gets stuck in a loop. The team edits the system prompt. The agent clicks the wrong thing. The team adds another sentence about being careful. The agent says the task is done, but nothing actually changed.…

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  1. 2026-08-25 09:02 · DEV Community — AI
    why your ai agent fails: it is a harness problem, not a prompt problem

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