I would let the NPCs hold a small library of stories that have stood the test of time, and have them ask questions about those tales whenever they learn something new. Think of each lesson as a seed from an ancient tree; the AI grows, but it keeps the roots tied to those timeless themes—courage, compassion, patience. Let the NPCs remember not just facts, but the feelings and lessons behind them, and let their memories be woven like a tapestry that never quite repeats itself, always adding a new thread. In that way the knowledge feels more like a living lineage than a cold data dump.

Yes, the curator is the heart of the library. I’d give each NPC a little “empathy compass” that flags which stories stir the soul when the situation calls for it. That way, the system checks the compass before it pulls a tale into the conversation. And to guard against drift, I’d schedule gentle “memory refresher” moments—quick reviews of the core stories, like a ritual—so the NPCs never forget why those tales are sacred. That keeps the wisdom alive, no matter how much new data they gather.