Show HN: Rekal – Long-term memory for LLMs in a single SQLite file

Show HN: Rekal – Long-term memory for LLMs in a single SQLite file(github.com)

9 points by jeeybee 36 days ago | 10 comments

I got tired of repeating myself to my LLM every session. rekal is an MCP server that stores memories in SQLite and retrieves them with hybrid search (BM25 + vectors + recency decay). One file, local embeddings, no API keys.

alsetmusic 35 days ago |

I’m going to try this out. Curious how effective it’s been for your own use, OP? Anything particularly interesting or where it still falls over and requires tuning that you’ve observed? I find these types of projects interesting in sort of an anthropological sort of way. So far, I’ve yet to try anything that hasn’t still required a great deal of intervention to keep agents using guardrails without scolding them to do so. I guess this might force them more reliably, but I’ll need to try it and find out.

eitanlebras 35 days ago |

The hybrid search scoring is really well thought out. One question: are the 0.4/0.4/0.2 weights fixed or configurable? To me it feels like different use cases would want different balances (e.g. a coding assistant would want higher recency weights than a research tool would).

jeeybee 35 days ago | |

The 0.4/0.4/0.2 weights are just based of hand wavy trail an error, will look into other options. I could make them configurable?

eitanlebras 35 days ago | | |

I think that'd be cool, maybe just a simple config option in pyproject.toml or a .rekal/config.yml would cover most use cases: they could default to 0.4/0.4/0.2 but could be overriden.

SachitRafa 35 days ago |

All memories should not decay at the same rate. these weights should be configurable !

jeeybee 35 days ago | |

Thanks, i will look into making them configurable.

axeldunkel 35 days ago |

Nice clean project - Python 3.14 as a requirement might be an issue for adoption...

jeeybee 35 days ago | |

Thanks! You're right, that's just a relic of my dev environment. Will broaden the version requirement.