I _think_ they are talking about treating the top level module as the facade for the whole application, which is something I've thought about doing a bunch. IE

I _think_ they are talking about treating the top level module as the facade for the whole application, which is something I've thought about doing a bunch. IE, it would be full of delegates to all your contexts and then _every_ public function is available off of it. I don't think this is a terrible idea but I like to draw boundaries and say "It's ok to reach one level deep from any point in the context tree". ie App.Chat.send_message/2 is cool, but MyApp.Chat.Messages.send_message/2.