{"id":"chat-fanout-on-write","text":"`_deliver` routes messages at send time based on recipient presence: online/away users get messages in `inbox`, offline users in `offline_queue` — this is fan-out-on-write, not fan-out-on-read.","truth_value":"IN","source":"entries/2026/06/05/chat-system-chat_system.md","source_url":"","source_hash":"","justifications":[],"dependents":["fan-out-write-pushes-references-not-data","write-time-routing-is-irrevocable"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"chat-fanout-on-write","truth_value":"IN","reason":"premise"}]}}