The language is being developed hand-in-hand with formalization of its semantics and its embedding into the Coq proof assistant — a state-of-the art tool for mechanized proofs about properties of programs.
Coq is based on advanced dependently-typed theory and features a large set of mathematical libraries.
It has been successfully applied previously to implement certified (i.e., fully mechanically verified) compilers, concurrent and distributed applications, including blockchains among others.