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+Playlist federation spec
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+## Playlist Federation
+
+### The Issue
+
+Playlists are a useful way to curate content and share curated lists of tracks. Currently, only local playlists are browsable in the pods. A user cannot add a playlist to their library/collection.
+
+### Proposed Solution
+
+Make playlists a federated object to allow them to be added to remote libraries/pods. Send playlist updates via federation activities.
+
+### Feature Behavior
+
+Users will be able to click on a "Follow playlist" button. The playlist content and the playlist itself will be added to the user's library section ("My library").
+
+#### Backend
+
+Adding a playlist to a library is an ActivityPub `Follow`. The follow request is made to an actor specially created for the playlist.
+Endpoints and logic should follow the actual ActivityPub implementation :
+
+- The follow request is accepted automatically if the playlist is public
+- When accepted, the playlist is added to the local pod, the playlist actor is created has followed by the local actor
+
+For better understandability, the playlist actor should be named after the playlist name and the user actor owning the playlist. For example, if John has a "Rock" playlist, the actor should be called: john_rock_playlist.
+Add playlist update activities to notifications.
+
+#### Frontend
+
+- Add a "Follow" button that will call an ActivityPub follow request on the playlist actor.
+- Update the playlist request in the "My library/Playlist" section to include followed playlist on top of owned playlist.
+- Make a visual distinction between owned and followed playlist in this page (optional)
+
+### Availability
+
+- [ ] Admin panel
+- [x] App frontend
+- [ ] CLI
+
+### Open Questions
+
+- Frontend design: There isn't any space for followed content in the UI (either for user or playlist follow). A dedicated page could be created. At least a feed page should be create that regroup followed content update (user and playlist follows activities)
+
+### Minimum Viable Product
+
+### Next Steps