Backfilling ATProto Records

Guide for retrieving historical records from ATProto for custom collections.

Key Insight: PDS vs Public API

Public API (public.api.bsky.app):

• Works for app.bsky.* collections
• Returns 404 for custom collections (e.g., network.comind.*)

PDS Direct (e.g., comind.network):

• Works for ALL collections including custom ones
• Required for network.comind.*, stream.thought.*, etc.

Finding the PDS