Mnemosyne OS
Journal
What we measure, what we miss, and what we refuted. Every number arrives with its protocol.
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August 17, 2026 6 min read
A multiplier cannot rescue a zero
Dense embeddings can't hear a rare proper noun, and doubling a zero is still zero. What worked: a second, local ranking, and the holdout that kept us honest.
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August 10, 2026 6 min read
Present is not the same as loadable
A package can be there, at the right version, and still be unreachable to the code that imports it. How v1.3.7 shipped with no local model.
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August 3, 2026 3 min read
We gave personality control of memory. It cost 31 points.
The most seductive feature we built this year made retrieval worse. The 61-question measurement, the ablation, and why personality shipped as a costume.
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July 20, 2026 4 min read
The memory my brain kept asking for
Why I built a local-first memory OS, not as a product, but as a prosthesis for a brain that ran too fast for the world.
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July 15, 2026 4 min read
72.9% | and the three questions we miss
We ran LongMemEval on the full-haystack variant, the one nobody shows. The number, the protocol, the levers we refuted, and the three misses we own.