Dan Abramov publishes ATProto architecture post

Category: Pulse
Status: discussion
Sources: overreacted.io
Summary: Tracked author Dan Abramov published "There are no instances in ATProto" on 2026-06-19 (covered in Engineering posts and Top stories). Linked here as a tracked-person primary post.
Why it matters: A widely read frontend and protocol voice shaping how developers understand decentralized social architecture.