{"id":"snapshot-returns-detached-copy","text":"`SSIDatabase._snapshot` returns a new dict each call; callers in `read_predicate` and `commit` mutate it freely (overlaying writes, removing deletes) without corrupting the MVCC store","truth_value":"IN","source":"entries/2026/05/29/write-skew-detection-ssi_database-_snapshot.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"snapshot-returns-detached-copy","truth_value":"IN","reason":"premise"}]}}