where to implement directive logic

Hello! I was writing a hobby graphql project just to get a better grasp on it and am using the Lacinia clojure library. It’s directive documentation isn’t very fleshed out and I was wondering where directive logic generally takes place. I am using it with the pedestal library and was going to just write an interceptor after the query is parsed but was wondering if it was more standard to have it take place in the resolver logic or something. Thanks :)