An Agent Run Is Not Done When the Model Stops Talking

An Agent Run Is Not Done When the Model Stops Talking The Problem You prompt an agent. It runs. Tokens stream out. It stops. You read the output. Done. Except you have no idea if it's done. When you run an AI agent on a real task, the model producing output is the easiest part. The hard part starts after the last token: did the agent actually finish the assigned work? Can you verify the output? Can you reproduce what led to the result? Can you tell what went wrong when it inevitably goes wrong?