How do I make sure my project is compatible with the Xbox GDK/SDK?

Developers are encouraged to have a working build of their game ready before applying for membership at ID@Xbox and their developer program. I am given no information and no tools, but I have to create a game.

How do I make sure I don’t use tools that are incompatible with Xbox though? I don’t want to rewrite too much code once I have access.

Am I to understand that any UE game is compatible with Xbox? All engine plugins are fine?

Is there anything I should stay clear of?