At Protocol: Building the Social Internet
Summary
Bluesky's AT Protocol is presented as a data network for social content, encoding posts and related actions as JSON with a strongly typed model and content IDs for durable links. The Public Firehose enables real-time streaming of all public activity for building feeds, bots, and search tools, without API keys. The ecosystem emphasizes interoperability, user-owned identities, and self-hosting, with extensive docs and guides to support developers.