{"id":"window-lifecycle-one-directional","text":"Window state follows a one-way ratchet: OPEN → CLOSED → FINALIZED. Windows never reopen; OPEN accepts all events, CLOSED accepts late events within the lateness allowance, FINALIZED rejects everything.","truth_value":"IN","source":"entries/2026/06/05/ad-click-event-aggregation-click_aggregator.md","source_url":"","source_hash":"","justifications":[],"dependents":["one-directional-state-machines-span-domains","watermark-finalization-is-irreversible"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"window-lifecycle-one-directional","truth_value":"IN","reason":"premise"}]}}