ActivityPub over ATProto

# Summary The author proposes running ActivityPub (the protocol behind Mastodon) on top of AT Protocol's Personal Data Server infrastructure as a way to move beyond the current factional divide in decentralized social media. AT Protocol offers architectural advantages like pluggable identity and signed data repositories that give users more control and guarantee exit options compared to traditional federation. The suggestion is framed as a design provocation to encourage the open social media community to focus on interesting technical solutions rather than tribal advocacy for competing platforms.