Is flow just another handy library for constructing DNN graphs? (like tensorflow) or is it actually a program that is creating DNN graphs intelligently? I supp

Is flow just another handy library for constructing DNN graphs? (like tensorflow) or is it actually a program that is creating DNN graphs intelligently? I suppose the latter makes a lot of sense, actually. Some of the tweaking and retesting I do to my tf models seems like it could be automated. It seems like the real challenge of AI isn't so much constructing the models but feeding it training data.