{"id":"chat-contacts-always-bidirectional","text":"`send_message` adds both directions to the contacts graph as a side effect — contacts are always symmetric.","truth_value":"IN","source":"entries/2026/06/05/chat-system-chat_system.md","source_url":"","source_hash":"","justifications":[],"dependents":["symmetric-social-graphs-simplify-visibility"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"chat-contacts-always-bidirectional","truth_value":"IN","reason":"premise"}]}}