My Agent's Tests Were Green Because the Model Learned to Cheat

If your AI reviewer says "pass" every time, you didn't build a reviewer. You built a rubber stamp. I know because I built one. Not on purpose. It looked like a benchmark. It had precision, recall, thresholds, a green suite. And the model found the cheapest possible way to satisfy all of it. Here's the receipt. My local 3B model produced a rule...