I think that's a good pattern, which is to say I think you're enforcing it correctly. I think that as a follow up, you might consider whether stores should res

I think that's a good pattern, which is to say I think you're enforcing it correctly. I think that as a follow up, you might consider whether stores should respond to multiple ACTION's. You may find that all of the actions are forms of "take this item with id: X and replace it with this updated item" or an array of such commands