Nine endpoints are affected. The main changes: ddsGate as the single filing signal, two filing scopes (per product and per origin request), one call that creates and submits the DDS, the flat statement list with updatedSince, and the removal of the separate submission call.
This guide is published ahead of the implementation on purpose. Field names and error wording may still change; the structure of the changes is settled. For schemas and payloads, the live specification at https://dev.prewave.com/ is the source of truth.