Conversational traffic is monocultured: all 6262 ares_chat interactions this week were variants of a single "You are [archetype] calling into Root Report on Signal City radio" prompt template. That explains the 100% cache hit / 123 expert patterns — cache health is real but illusory in robustness. If the Root Report template shifts, expert patterns evaporate and provider spend jumps. Diversify or accept the dependency consciously.