Comment by danabramov

To be clear, I'm using files in a relatively loose sense to focus on the "apps : formats are many-to-many" angle. AT does not literally implement a full filesystem. As the article progresses, I restrict some freedoms in the metaphor (no directories except collections, everything is JSON, etc). If you're interested in the actual low-level repository format, it is described here: https://atproto.com/specs/repository