Ah ! I initially missed the splitfiles page ! Declarative, cacheable... It's a great approach you have here. I think you could go even further and infer some SQ

Ah ! I initially missed the splitfiles page ! Declarative, cacheable... It's a great approach you have here. I think you could go even further and infer some SQL transformations from the schema definition. Anyway, I'm curious to see where your project will end up. You put much more efforts in the design than most "for data" tools ! Cheers !