There is a proposal https://discuss.ocaml.org/t/proposal-a-new-exports-field-in-findlib-meta-files/13947/40 for a convention to extend the notion that we call (re_export) in Dune to general META files via a new field called exports. In order to play well with the ecosystem, Dune should map (re_export) to the exports file in META and vice-versa.

I suspect these aspects will become more relevant as time passes and (implicit_transitive_deps false) is adopted more widely, now that it is correctly implemented by -H.