I work on Executable Rationality and efficient AI: making machine cognition explicit, runnable, and efficient. Independent, building in the open for over a decade.
Things of mine you can run:
- slotstream: a 105 GB mixture-of-experts model on a 48 GB Mac, streamed from SSD. One Swift binary, and every number ships with its measurement.
- db.md: the open standard for databases in plain markdown files.
I help teams run open models on hardware they already own, and fix production agent workflows that fail in ways nobody can reproduce. Write to carloslfu@gmail.com.




