Beyond RAG: Why Knowledge Engineering Becomes the Real Moat in the Agent Era

RAG brings books to the exam. Knowledge Engineering teaches Agents to study. Memory architecture matters more than retrieval tuning. Everyone says the Agent era is about better prompts, bigger context windows, and smarter retrieval. That is true — but it is not the bottleneck anymore. The bottleneck is memory architecture. Most teams still treat knowledge like a temporary input: retrieve chunks, answer the question, discard the trace. That works for demos. It fails in long-running systems. The s