Why it matters
RAG is dead. Again. Vector search is useless. All you need is BM25. Not even BM25, all you need is grep. Or maybe even just cat+ls. If you care at all about agents, you probably read a variation of this as part of your daily routine. In a way, isn't it true that semantic search is full of failure cases? And yet, in all
My takeaway: How we taught agents to use good retrieval - Hanna Lichtenberg, Mixedbread AI is an agent-security signal. The practical read is that autonomy, memory, tool permissions, and third-party integrations are the control surface that needs threat modeling and monitoring.