Fine-Tuning Is Often the Wrong First Move: Introducing Harneloop
An open-source framework for artifact-aware, evidence-gated agent harness evolution
Jul 23, 20264 min read3

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An open-source framework for artifact-aware, evidence-gated agent harness evolution

80% start with "Act as an expert." 62% contain contradictory constraints. 14% emotionally threaten the AI. Here's the data.

We tested 5 frontier models across 1,080 evaluations. JSON won. Short prompts won. Everything you thought you knew about prompt engineering is wrong.
