{"id":"nearby-friends-grid-is-thread-safe","text":"Location storage, grid index updates, and candidate snapshots in update_location and get_nearby_friends are protected by threading.Lock, preventing concurrent corruption of the spatial index.","truth_value":"IN","source":"entries/2026/06/05/nearby-friends-nearby_friends.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"nearby-friends-grid-is-thread-safe","truth_value":"IN","reason":"premise"}]}}