Reason language development is happening at https://github.com/facebook/reason/ https://github.com/facebook/reason/ Like huy-nguyen said, this is a tooling & e

Reason language development is happening at https://github.com/facebook/reason/ https://github.com/facebook/reason/ Like huy-nguyen said, this is a tooling & ecosystem effort on top of OCaml ecosystem, and the language syntax is a small part of the effort. It's a bit scattered, but apart from ReasonReact, there is also https://reason-native.com/ https://reason-native.com/ and Esy that are parts of this bigger picture. Both OCaml and Reason communities are also quite active in producing tooling and libraries, I'd suggest following the relevant forums. I believe Reason's development momentum is not centralized around a core Reason repo/org and a team.