I couldn't find this easily before, but are there docs for how to build a new device that would be Home Assistant-ready right away to facilitate easy integration? Most of the docs appear to be how to get existing devices managed by Home Assistant..
Adding new component is also relatively straight forward. For ex, have a look at https://github.com/home-assistant/home-assistant/blob/dev/ho... and other components. You implement couple of methods of existing traits, in this case, SwitchDevice.