Status: IN
Items larger than ~34 KB may exceed the 1 MB Kinesis record limit due to serialization expansion (Boolean/empty attributes: 1 byte in DynamoDB → up to 5 bytes in JSON) and are silently skipped (not retried).
Source: entries/2026/03/11/amazondynamodb-latest-developerguide-kds_using-shards-and-metricshtml.md