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Show HN: A memory database that forgets, consolidates, and detects contradiction

https://github.com/yantrikos/yantrikdb-server
12•pranabsarkar•3h ago
Vector databases store memories. They don't manage them. After 10k memories, recall quality degrades because there's no consolidation, no forgetting, no conflict resolution. Your AI agent just gets noisier.

YantrikDB is a cognitive memory engine — embed it, run it as a server, or connect via MCP. It thinks about what it stores: consolidation collapses duplicate memories, contradiction detection flags incompatible facts, temporal decay with configurable half-life lets unimportant memories fade like human memory does.

Single Rust binary. HTTP + binary wire protocol. 2-voter + 1-witness HA cluster via Docker Compose or Kubernetes. Chaos-tested failover, runtime deadlock detection (parking_lot), per-tenant quotas, Prometheus metrics. Ran a 42-task hardening sprint last week — 1178 core tests, cargo-fuzz targets, CRDT property tests, 5 ops runbooks.

Live on a 3-node Proxmox homelab cluster with multiple tenants. Alpha — primary user is me, looking for the second one.

Comments

pranabsarkar•3h ago
Author here. I built this because I was using ChromaDB for an AI agent's memory and recall quality went to garbage at ~5k memories. The agent kept recalling outdated facts, contradicting itself across sessions, and the context window was full of redundant near-duplicates.

I tried to write the consolidation/conflict-detection logic on top of ChromaDB. It didn't work — the operations need to be transactional with the vector index, and they need an HLC for ordering across nodes. So I built it as a database.

The cognitive operations (think, consolidate, detect_conflicts, derive_personality) are the actual differentiator. The clustered server is what made me confident enough to ship — I needed to know the data was safe before I'd put real work on it.

What I genuinely want to know: is this solving a problem you're hitting with your AI agent's memory, or did I build a really polished thing for my own narrow use case? Honest reactions help more than encouragement.

polotics•51m ago
In this day and age, without serious evidence that the software presented has seen some real usage, or at least has a good reviewable regression test suite, sadly the assumption may be that this is a slopcoded brainwave. The ascii-diagram doesn't help. Also maybe explain the design more.
6r17•23m ago
I kind of agree with the comment here that a lot of stuff happening around comes out from an idea without proof that the project has a meaningful result. A compacting memory bench is not something difficult to put off but I'm also having difficulties understanding what would be the outcome on a running system
altmanaltman•39m ago
Did you check if this leads to any actual benefits? If so, how did you benchmark it?
Mithriil•27m ago
The half-life idea is interesting.

What's the loop behind consolidation? Random sampling and LLM to merge?

tcdent•25m ago
I appreciate the effort you put into mapping semantics so language constructs can be incorporated into this. You’re probably already seeing that the amount of terminology, how those terms interact with each other, and the way you need to model it have ballooned into a fairly complex system.

The fundamental breakthrough with LLMs is that they handle semantic mapping for you and can (albeit non-deterministically) interpret the meaning and relationships between concepts with a pretty high degree of accuracy, in context.

It just makes me wonder if you could dramatically simplify the schema and data modeling by incorporating more of these learnings.

I have a simple experiment along these lines that’s especially relevant given the advent of one-million-token context windows, although I don’t consider it a scientifically backed or production-ready concept, just an exploration: https://github.com/tcdent/wvf

hazelnut•5m ago
Congrats, looking promising. How does it compare to supermemory.ai?

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