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Background knowledge about Mbin, the federated content aggregator and microblogging platform (active community fork of Kbin). Covers the hybrid dual content model (threads as Page + microblogs as Note in one platform), magazines as Group actors with Announce relay, the three actor types (Application instance actor at /i/actor, Person user at /u/username, Group magazine at /m/name), the full activi

Background knowledge about how the Like activity works on the Fediverse and in ActivityPub, including the Like/Undo{Like} flow, the `likes` and `liked` collections, delivery model, the Dislike type (exists in ActivityStreams but is unused in ActivityPub), emoji reactions (EmojiReact / FEP-c0e0 vs the Misskey _misskey_reaction approach), stale like counts on remote posts, and implementation differe

Background knowledge about Kbin and its active community fork Mbin, the decentralized content aggregator and microblogging platform for the Fediverse (Reddit + Mastodon hybrid). Covers the dual content model (threads/link aggregation via Page objects + microblogging via Note objects in a single platform), magazines as Group actors with Announce relay (same pattern as Lemmy communities), the three

Background knowledge about PeerTube, the decentralized video streaming platform. Load when the user asks about implementing a PeerTube- compatible ActivityPub server, federating with PeerTube instances, PeerTube's two-tier actor model (Person actors own Group channel actors, Application instance actor), PeerTube's attributedTo requirement (videos must reference a Group actor which references an ow

Background knowledge about how relays work on the Fediverse, including at the ActivityPub wire-format level. Load when the user asks about implementing a relay, subscribing to a relay, the relay subscription handshake (Follow/Accept to the Public collection), the two relay protocols (Mastodon relay protocol vs LitePub/Pleroma relay protocol), the /inbox vs /actor subscription endpoints, how relays