BuildDiff: document what the inputs mean

They were tripping me up, so it helped to know exactly what they were at the ~point they're used.

Created by  Cole Helbling  on January 10, 2022
YKMAJOVQMQ6DF2V6HMMQMAQXGYIOUN64YLMPZ6YUTGKK4IL7JCIQC
In channels
main
Change contents