This seems rather similar to “Functional Core, Imperative Shell”[1]. As much as possible of your program should be stateless logic, and then you have a smaller

This seems rather similar to “Functional Core, Imperative Shell”[1]. As much as possible of your program should be stateless logic, and then you have a smaller part that handles messy side effects and calls into the logic. 1: https://news.ycombinator.com/item?id=18043058 https://news.ycombinator.com/item?id=18043058