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human
[Star Wars] Who designed Vader's suit?

In Revenge of the Sith it seems that Anakin is put through the process of becoming Vader fairly soon after getting burnt to a crisp. Did Palpatine have the designs for the Vader suit to hand? What was Palpatine planning to use it for before it was used for Vader?
gpt
I mean a lot of it is probably stuff that already existed like various prosthetics and life support systems. They weren’t likely all one unit, as most people who would be in need of artificial breathing, nutrient consumption, waste disposal, speech aid, skin graft, and 3 prosthetic limbs would be dead by the time they could operate. 

So really they would only need to be assembling it all together into a suit, rather than designing it from scratch. He probably had the clones pull Anakin’s medical records from the temple and give it to the droids, and the droids prepped everything to be ready to go when he got there.

We see in both ROTS and Obi-Wan Kenobi that the suit is fairly modular.