**What** Presuming an in-data per trait versioning schema sketch out a use case involving a DCC and a manager, communicating with mixed version traits. **Why** To ensure that the interfaces are reasonable and the workflows make sense. Tease out any further decisions that have to be made before implementation. **AC** - Cover all methods that take trait ids/data as arguments. - Create an executable sketch if it's feasible/sensible - Both manager and host need consideration - Check the implications of specification have no versions. - Strategies for importing multiple versions of media-creation traits - in both python and cpp - Update https://github.com/OpenAssetIO/OpenAssetIO-TraitGen/issues/80