{"id":"chat-dm-conversation-dedup","text":"DM conversations use a deterministic sorted-pair ID (`dm:{min}:{max}`) guaranteeing exactly one conversation per user pair regardless of who messages first.","truth_value":"IN","source":"entries/2026/06/05/chat-system-chat_system.md","source_url":"","source_hash":"","justifications":[],"dependents":["deterministic-ids-eliminate-coordination"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"chat-dm-conversation-dedup","truth_value":"IN","reason":"premise"}]}}