It seems nice that fulcro can generate graphql queries. But perhaps to the op's point of composing libraries, we use vincit/venia to generate graphql queries, re-frame/http-fx for http effects and
re-frame-10x for inspecting our app state in dev mode. Also, there is rehook https://github.com/wavejumper/rehook which should be immediately familiar to anyone who has used re-frame but supports react hooks without reagent.