As an alternative, Sorbet supports inline typing, separate files via .rbi (for typing external libs, etc), and I believe will support reading in .rbs files as w

As an alternative, Sorbet supports inline typing, separate files via .rbi (for typing external libs, etc), and I believe will support reading in .rbs files as well: https://sorbet.org/blog/2020/07/30/ruby-3-rbs-sorbet https://sorbet.org/blog/2020/07/30/ruby-3-rbs-sorbet It has some limitations (arguably good - it's harder to do shady metaprogramming if you want type safety) but I've found it very productive and useful in my large code base.