## How to Build Effective Evals for AI Agents Learn how to build effective evals for AI agents, from designing clear tasks and choosing the right graders to building reliable eval harnesses and tracking changes over time. ## Introduction A common problem with AI agents is that their performance can seem worse after a change, without anyone knowing what caused it. The system prompt may have been changed, a tool description may have been updated, or the underlying model may have moved to a different version. Any of these changes can affect how the agent behaves. Without a consistent way to…