Quote from the article:
“The fediverse and Bluesky are often discussed as competing visions of decentralized social media. ActivityPub is a W3C standard implemented by Mastodon, Misskey, Lemmy, and hundreds of other projects. AT Protocol is Bluesky’s foundation — a different architecture built around personal data servers, DIDs, and a global firehose. Most projects pick one. A few try to bridge them externally. Wafrn does something more ambitious: it implements both natively, in the same codebase, with a unified user model that lets a single account exist on both networks simultaneously.”