Conventions
The house rules — how docs are written, and what a page is expected to look like before it ships.
Conventions are the rules a reviewer would otherwise have to repeat. They are written down so a disagreement is about the rule rather than about taste.
UI
The four regions a tool screen is built from, and the overlay vocabulary.
Where state lives
React Query for server state, nuqs for web, zustand for mobile.
Writing docs
Voice, page shape, the components available, and what fails the build.
Rules for coding agents — the instruction files and the skill catalogue — are under Agents.
Code conventions live next to the code they govern: the Expo app's, and the per-package rules under Packages.