Agent Trajectory Evaluation

Goal

Evaluate an agent's trajectory — the sequence of tool calls, arguments, observations, and state-machine transitions it produces — rather than scoring the final answer alone. A correct final answer can hide a reckless or lucky path (wrong tools, illegal state jumps, wasted calls), and a wrong answer can sit on top of a nearly-correct path worth one fix. You must score both how the agent got there and where it ended up.