Yes, classifiers existed. BERT, DeBERTa, GLiNER, fine-tuned heads. Most of them were specialized. Pick the labels, train, ship. Changing the rules at runtime meant another training run. What we did not have was a general-purpose classifier at Terra / Sonnet 5 level intelligence. You could fake it by asking an LLM for JSON, but that was slow, expensive, and poorly calibrated. Jev is that missing piece. Labels defined in code, typed answer plus confidence, no extra LLM call. Classification is not new. What is new is a general-purpose classifier this intelligent, this fast, and this cheap.