Ask HN: What's SoTA in Agent Memory?

I built a Telegram agent for my partner and I where we can message it photos or descriptions of food we had, and it logs our macros. I wanted to build a "food memory" feature, where I could say something like "had my usual smoothie" and it remembers the macro breakdown of it.

Curious on what the best approaches are nowadays for this type of agent memory? Papers, articles, tweets or github links much appreciated!