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kitfunso/hippo-memory
The most carefully reported Jev result in this column, negative included.
What it does
A memory layer for AI agents modelled on the hippocampus: decay by default, strength through use, provenance on every memory, SQLite underneath and no runtime dependencies. It works across CLI agents rather than inside one.
The repository's own description: “Biologically-inspired memory for AI agents. Decay, retrieval strengthening, consolidation. Zero runtime deps, SQLite, MCP. Benchmarked retrieval with an opt-in TypeSafe Jev reranker.”
How it works
Jev is an opt-in reranker, and the repository reports it the way a result should be reported: `hippo recall --reranker jev` lifts R@1 from 0.41 to 0.62 on a private 300-query developer store at about $0.0004 a recall, the margin held in 20 of 20 seeds — and three graded tests still did not beat the free local cross-encoder, which is printed in the same document.
The repository, by the numbers
Read from the GitHub API on 2026-09-22. Stars and the last push move daily — quote them with the date, the way we do.
What we checked
- the tree: bin, benchmarks, evals, extensions, integrations, python, docs
- MIT LICENSE (Keith So) and an npm package name in package.json
- README reports the Jev reranker eval with its paired-bootstrap margin and its negative result
- README states the reranker is off by default
What we did not check. We did not install it, and the eval is on a private query store, so it cannot be reproduced from here.