{"id":"news-feed-fan-out-write-pushes-ids","text":"Fan-out-on-write pushes post IDs (not full post objects) into followers' deques at write time, deferring hydration to read time so engagement metrics are always current","truth_value":"IN","source":"entries/2026/06/05/news-feed-system-news_feed.md","source_url":"","source_hash":"","justifications":[],"dependents":["fan-out-write-pushes-references-not-data"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"news-feed-fan-out-write-pushes-ids","truth_value":"IN","reason":"premise"}]}}