- Article GUID hashes are not hashes like in NCN; they are integers rendered as strings
- Article fingerprints are a combination of hashes rather than a single hash
- When marking articles as starred the feed ID is ignored, as they are not needed to establish uniqueness
- The feed updater ignores the `userId` parameter: feeds in The Arsse are deduplicated, and have no owner
- The `/feeds/all` route lists only feeds which should be checked for updates, and it also returns all `userId` attributes as empty strings: feeds in The Arsse are deduplicated, and have no owner
- The "updater" console commands mentioned in the protocol specification are not implemented, as The Arsse does not implement the required Nextcloud subsystems
Tiny Tiny RSS is unique in allowing newsfeeds to be grouped into folders nested to arbitrary depth. When newsfeeds are placed into nested folders, they simply appear in the top-level folder when accessed via the Nextcloud News protocol.