Yeah, just reading their description I was like "the middle part seems easily done as its own thing". "Functional Core, Imperative Shell" was just posted too,

Yeah, just reading their description I was like "the middle part seems easily done as its own thing". "Functional Core, Imperative Shell" was just posted too, this is the perfect example of where that structure works: https://news.ycombinator.com/item?id=34860164 https://news.ycombinator.com/item?id=34860164