How Bluesky's AT Protocol Rethinks Social Media Architecture at Scale

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Bluesky's AT Protocol (ATProto) takes a federated approach to social infrastructure, giving each user a cryptographically signed personal data repository they fully control and can move between providers. Rather than relying on a single large database, the protocol separates functions across independent services: personal data stores, relays that aggregate public data, and app views that query and display content. This design sidesteps the consistency bottlenecks that force conventional social platforms into costly trade-offs between scalability and query capability. ATProto also decentralizes moderation by allowing anyone to run labeling services, letting users choose which moderation sources they trust. The architecture aims to enable platform competition and user portability without the lock-in that characterizes today's centralized social networks.

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ProgrammingDEV Community ·

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