Why Your Agent's Eval Suite Won't Catch Production Failures
python
dev.to
Your eval suite passed. Your agent is degrading in production. These two facts are not contradictory - they're the expected outcome when you treat offline evaluation as a sufficient signal for production reliability. Offline evals and production outcome tracking solve different problems. Conflating them is how you end up with green CI checks and a support queue full of AI-generated nonsense. What Evals Are Actually Measuring A typical eval setup looks like this: you have a dataset o