{"id":"wal-no-nested-batches","text":"The WAL format has no batch-start marker and no nesting support; the lock held during `append_batch` prevents interleaving, making nested or concurrent batches structurally impossible","truth_value":"IN","source":"entries/2026/05/29/topic-commit-aware-replay-design.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"wal-no-nested-batches","truth_value":"IN","reason":"premise"}]}}