# Riff MAIN_SCREEN contract — registry

> **Status:** Adopted and normative for MAIN_SCREEN only\
> **Authority:** Registered by [Riff system requirements](requirements.md). System-wide requirements
> control shared platform, data, safety and UI rules.

This page is a bounded registry. The linked children own the detailed requirements.

## Sections

- [Scope and platform boundary](main-screen-scope-and-platform-boundary.md)
- [State and accessibility](main-screen-state-and-accessibility.md)