# Riff Indexer requirements

> Owner: `:indexer`. This registry routes each scope to its controlling contract.

## Sources and catalogs

- [Cuetree integration](/Riff/LATEST/cuetree-integration)
- [Media admission](/Riff/LATEST/indexer-media-admission)
- [Source failures and recovery](/Riff/LATEST/indexer-source-failures)
- [Reliable Player/Indexer IPC](/Riff/LATEST/reliable-player-indexer-ipc)
- [Media.ID component formation](/Riff/LATEST/media-id)
- [Library lifecycle](/Riff/LATEST/indexer-library-lifecycle)
- [Metadata](/Riff/LATEST/indexer-metadata) and
  [Cuegrain integration](/Riff/LATEST/cuegrain-integration)
- [Genre processing](/Riff/LATEST/genre-processing), [locales](/Riff/LATEST/genre-locales) and
  [synthetic genres](/Riff/LATEST/synthetic-genres)
- [Album grouping](/Riff/LATEST/album-grouping)
- [Publication](/Riff/LATEST/immutable-publication) and
  [SAF coordination](/Riff/LATEST/indexer-staging)

## Audio analysis

- [Cuetree analysis](/Riff/LATEST/cuetree-analysis-integration) and
  [analysis procedures](/Riff/LATEST/indexer-analysis-procedures)
- [ReplayGain](/Riff/LATEST/replaygain-support)
- [AI model](/Riff/LATEST/indexer-ai-model) and [package](/Riff/LATEST/indexer-ai-package)

[Data formats](/Riff/LATEST/fbs-schema) owns wire layouts. Player UI, playback and mutable state
follow the Player registry.