Sorry, you have to provide the handlers to add, edit or delete objects. In MasterDetailTabViewController (in IdeaBlade.Cab.UI), look at the method
ConfigureMasterViewContext()
You'll need to create handlers and register commands in much the same way in your ContactViewTabViewController. Just walk thru the code to see how it's done.
The point of the command pattern is to decouple the source of the command's firing (button, menu item) from the actual command processing. The view controller is where you "know" about how to create, edit and delete elements of your data mode. You don't want to couple the general-purpose presenter or the ToolStripAdapter to this information.
Bill J.