quote:
is there any way to classify a planet as a resource storage facility or something?
Under (F5) Colonies/Set Colony Type, you can add new types to the list.
If you don't want to have to do that every game, you can edit DefaultColonyTypes.txt to add more entries.
AFAIK, the AI won't use the new types you add; I'm not sure whether editing them into Default_AI_Construction_Facilities.txt would work.