This directory is code that could POSSIBLY be used by both the engine and clients. It's very, very important that nothing here gets messed up that violates client/engine separation. All interfaces use simple messages composed of serializable types, and no binary data that could break is shared. It's basically a functional version of a human-readable OSC interface, in both directions. The interface here maps directly on to the OSC interface - except it can happen in the same process as well, with only (virtual) function call overhead.