{"id":"write-time-routing-is-irrevocable","text":"Both news feed and chat make irrevocable routing decisions at write time — selecting push vs pull strategy and routing to inbox vs offline queue respectively — with no mechanism to retroactively re-route messages when conditions change.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["news-feed-celebrity-threshold-at-write-time","chat-fanout-on-write"],"outlist":[],"label":"news feed selects fan-out-on-write vs fan-out-on-read based on follower count at publish time; chat routes to inbox or offline queue based on presence at send time — both decisions are baked in at write time and not revisited"}],"dependents":["write-time-decisions-are-lightweight-but-binding"],"metadata":{"last_reviewed":"2026-06-06T06:26:57","review_result":"pass"},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"write-time-routing-is-irrevocable","truth_value":"IN","reason":"SL justification valid","antecedents":["news-feed-celebrity-threshold-at-write-time","chat-fanout-on-write"],"label":"news feed selects fan-out-on-write vs fan-out-on-read based on follower count at publish time; chat routes to inbox or offline queue based on presence at send time — both decisions are baked in at write time and not revisited"},{"node":"news-feed-celebrity-threshold-at-write-time","truth_value":"IN","reason":"premise"},{"node":"chat-fanout-on-write","truth_value":"IN","reason":"premise"}]}}