Questions about WRB on my timber framed home – GreenBuildingAdvisor

Hey all, I am building my first home (a small 600sqft timber frame) in Southern Vermont. I am leaving all my framing members exposed, because in my opinion that’s half the reason to build a timber frame (the beauty!!). My question is specifically for my roof. I am wrapping my roof with a 2x sprue T&G to have as my exposed ceiling. I am having some trouble figuring out what to wrap the T&G with after it is installed. Some have told me a normal roofing wrap, and some have told me to go with the more modern approach and use Intello Plus, since technically that ceiling decking is my interior finish. However i’m not sure how well that would do being exposed to the elements before my foam and roof goes up. Vapor Permeable wrap? Grace water and Ice? I can’t find any solid advice on what to use here. For Clarification, I have foil faced rigid foam going up after the ceiling boards, then 2x battens, then my metal roof. Would love some input, thanks!