The harness is where most of the engineering lives, and the eval layer is what tells you whether the harness is actually working. I have seen agents where the runtime was clean but the offline evals scored the wrong axis, so production failures accumulated while the dashboard stayed green.
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Kartik N V J K
AI Developer | Making AI reliable, trustworthy & accessible to everyone | Active community contributor
The harness is where most of the engineering lives, and the eval layer is what tells you whether the harness is actually working. I have seen agents where the runtime was clean but the offline evals scored the wrong axis, so production failures accumulated while the dashboard stayed green.