Serving the For You feed One of Bluesky's most interesting features is that anyone can run their own custom "feed" implementation and make it available to other users - effectively enabling custom algorithms that can use any mechanism they like to recommend posts. spacecowboy runs the For You Feed , used by around 72,000 people. This guest post on the AT Protocol blog explains how it works. The architecture is fascinating . The feed is served by a single Go process using SQLite on a "gaming" PC