{"id":"wal-format-change-breaks-compatibility","text":"Changing the CRC input in `_encode_record` invalidates all existing WAL files; a production deployment would require a version byte and dual-path CRC verification during migration","truth_value":"IN","source":"entries/2026/05/29/topic-seq-num-integrity-gap.md","source_url":"","source_hash":"","justifications":[],"dependents":["wal-binary-format-prevents-evolution-and-recovery"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"wal-format-change-breaks-compatibility","truth_value":"IN","reason":"premise"}]}}