Lesson 3.37mIntermediate15.5k students

Guardrails and evaluation

Without an evaluation set you cannot tell an improvement from a regression. Guardrails then enforce the limits your evaluation exposed.

This lesson sits in Tool Calling and Agents, part of Building AI Apps with LLMs. It assumes what came before it and leads directly into the next lesson in the module.

In this lesson you will

  • Build a small, honest evaluation set early
  • Score changes against it before shipping
  • Enforce boundaries the model must not cross

Pro tip

Thirty real examples you curated beat a thousand you generated with the same model you are testing.

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