Semantic Design with SEDELA

I'm working on specifying a language for specifying program design, or 'semantic design', called SEDELA. 'Semantic design' is a program design tool inspired by Conal Elliott's 'denotional design' as presented in "Denotational Design: From Meaning to Programs" here -

Denotational Design Talk

Currently, I have specified a rough outline of the syntax and semantics here -

Semantic Design Language

I am thinking very seriously about writing a parser, type-checker, and a Visual Studio Code editing plug-in for SEDELA. But first, I want to get the community's feedback on the current specification as well as the idea in general.

Thank you all once again for any assistance provided in these endeavors!