| Error Handling | Specification / Design |
| Event Bus Sse | Specification / Design |
| Graceful Shutdown | Specification / Design |
| Key Rotation | Specification / Design |
| Lidarr Submission Queue with Backpressure | Specification / Design |
| Listen Playlist Sync | Specification / Design |
| Metadata Enrichment Pipeline | Specification / Design |
| Multi-Database Support | Specification / Design |
| Music Provider Integration | Specification / Design |
| Observability | Specification / Design |
| Playlist Sync Navidrome | Specification / Design |
| Similar Artists Discovery | Specification / Design |
| Sync Failure Email Notifications | Specification / Design |
| Track Matching | Specification / Design |
| Unified Tag Taxonomy | Specification / Design |
| User Authentication | Specification / Design |
| Vibes Ai Mixtape Engine | Specification / Design |