Building a DynamoDB conformance suite

Update, July 2026. Since I wrote this, the DynamoDB conformance suite has grown from the 526 tests below to 954, and it now has a name and a board of its own: Parity Suite. The current standings are live at the DynamoDB conformance board . The rest of the article is left as it was, a record of where the suite started. When I started building Dynoxide - a DynamoDB-compatible engine in Rust - I kept…