{"id":"ch-migration-tracking-optional","text":"Both `add_node` and `remove_node` accept an optional `keys` list and report which keys moved — the ring itself is stateless w.r.t. data and only computes migration impact when given a key set.","truth_value":"IN","source":"entries/2026/06/05/consistent-hashing-consistent_hashing.md","source_url":"","source_hash":"","justifications":[],"dependents":["consistent-hashing-is-a-stateless-topology-abstraction"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"ch-migration-tracking-optional","truth_value":"IN","reason":"premise"}]}}