Chapter 14 of 17 · Level 8 · EvaluationEvaluating Agents & LLMsWhy there is rarely one right answer, eval harnesses, benchmarks, and LLM-as-judge.14.1An Agent You Cannot Measure Is an Agent You Cannot ImproveMeasuring agents is the skill that separates a demo from a product. It looked fine when I tried it is not measurement, and this is how you replace that feeling with numbers you can trust.7 min read→