Writing

The Matrix blog.

Engineering notes, product reasoning, and the occasional argument with the prevailing wisdom. Written for the people who have to make filing actually work.

Engineering

Why we built a document sorter without AI.

A 92% accurate filing system is a 100% broken filing system. The case for deterministic, HMAC-signed document classification over cloud OCR and AI classifiers in regulated verticals.

25 April 2026 · ~9 min read