Provider connections
Spotify
Stable provider
Apple Music
Stable provider
YouTube Music
Beta disabled
Sync target
Spotify and Apple Music are the reliability target. YouTube is available only when beta mode is enabled.
Persistence
Postgres stores tokens, pair state, playlist cursors, track mappings, unmatched tracks, and sync events.
Scheduler
Redis and BullMQ schedule polling jobs. Workers rebuild schedules from Postgres after Redis restarts.