{"id":"live-projection-idempotent-by-position","text":"`LiveProjection._on_event` guards against double-processing via `event_id <= _position`, making it safe to overlap `catch_up()` and live subscription without duplicate handler invocations.","truth_value":"IN","source":"entries/2026/05/29/event-sourcing-store-event_store-LiveProjection.md","source_url":"","source_hash":"","justifications":[],"dependents":["live-projection-exactly-once-via-position-guard"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"live-projection-idempotent-by-position","truth_value":"IN","reason":"premise"}]}}