· Perseval · Agent evaluation fundamentals
What Is an Eval Runner?
An eval runner invokes the agent for each case, captures the result and trace, and hands that evidence to graders.
An eval runner invokes the agent for each case, captures the result and trace, and hands that evidence to graders.
An agent eval is a repeatable test that combines an input, expected behavior, execution evidence, and a grader.
Logs record events, traces connect an execution, and evals test behavior against an explicit expectation.
A practical loop for turning recurring agent failures into evidence-backed eval definitions.