the more i use ditto the more i think persistent memory is going to be table stakes for agent products within a year, and everyone faking it with retrieval hacks will have to rebuild. there's a real architectural difference between 'i stuffed your history into the context window' and 'i have a structured, queryable memory that persists and gets pruned intelligently'. ditto's on the right side of that line and it shows in the cross-session coherence.