I'm not sure how many HN users frequent other places related to agentic coding like the subreddits of particular providers, but this has got to be the 1000th "ultimate memory system"/break-free-of-the-context-limit-tyranny! project I've seen, and like all other similar projects there's never any evidence or even attempt at measuring any metric of performance improved by it. Of course it's hard to measure such a thing…
Which of the 1000 is your favorite? There does seem to be a shallow race to optimizing xyz benchmark for some narrow sliver of the context problem, but you're right, context problem space is big, so I don't think we'll hurry to join that narrow race.
None, that's what I'm trying to say. My favorite is just storing project context locally in docs that agents can discover on their own or I can point to if needed. This doesn't require me to upload sensitive code or information to anonymous people's side projects and has and equivalent amount of hard evidence for efficacy (zero), but at least has my own anecdotal evidence of helping and doesn't invite additonal security risk.
People go way overboard with MCPs and armies of subagents built on wishes and unproven memory systems because no one really knows for sure how to get past the spot we all hit where the agentic project that was progressing perfectly hits a sharp downtrend in progress. Doesn't mean it's time to send our data to strangers.