Blog · Field notes & build logs

Notes from the workshop

Writing from inside real projects: design decisions, engineering trade-offs, and the tools we shipped along the way. No recycled listicles, just receipts.

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Codex - an offline library that answers in milliseconds

We had 180GB of offline archives that worked and were almost unusable. Codex rebuilds them into plain SQLite, 25x smaller, searchable in single-digit milliseconds, readable by any language. What it is, why it exists, and how it was built.

A stack of offline archives narrowing into a single SQLite file, with a search box returning ranked results
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Jul 14, 2026

A tool you can download and own

Our QR code generator is one HTML file that works offline forever. The engineering and the ethics of building tools people can take with them.

4 min