Started as a personal research tool — I was buried in notes and needed something that could connect sources without hallucinating. Instead of feeding it content, I built a system-prompt structure using curated knowledge graphs that shape the model's prior. It surfaces things I'd never heard of without just pulling from generic top-10 lists.

Over 14 months it grew into something I'd call a DIY OS. Key parts:

- A recursive learning system that tracks tool usage and re-ranks tools based on your habits - An intent coordinator that abstracts the interaction layer so you can plug in game controllers, MIDI, gestures, or voice without hard-wiring each one - A built-in app SDK — the system generates its own apps based on usage patterns (the calendar and study timer were made by Prvctice itself)

It's free and open source. I also wrote a longer piece about the 14-month journey here: https://prvctice.com