# Riff synthetic genre ID contract — registry

> **Status:** Adopted normative scoped contract\
> **Authority:** Registered by [Riff system requirements](requirements.md).\
> **Scope:** Stable negative genre IDs, source-provenance evidence, GNRE-normalized UI equivalence,
> MDRG genre serialization, and canonical genre presentation.

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

## Sections

- [1. Identity and provenance](synthetic-genres-identity-and-provenance.md)
- [5. MTG-Jamendo classifier assignments](synthetic-genres-mtg-jamendo-classifier-assignments.md)

- [Exact GNRE equivalence and verification](synthetic-genres-equivalence.md)