[knome]

>Delta though is hard, since there always is an inherent race between getting the first full snapshot, and subscribing to updates.

Since the deltas include a version identifier for what they should be applied on top of, then you should always be able to safely start by requesting the deltas, then ask for the object. Buffer the deltas till your full copy is received, then discard deltas for previous versions until the stream applies to yours, applying them thereafter to keep it up to date.