Would be cool to have similar tooling (de-attached from XCode) for live previewing interfaces built with Swift UI.

Interesting project! I have been wondering why there isn’t a LISP on top of LLVM yet (except Common Lisp port, Clasp). Good that someone started to work on this.

Jank looks like a project to check in on its status a few times a year, exciting possibilities.

For your thinking about Clasp and alternatives for Common Lisp: I don’t think there is a gap to be filled with Common Lisp deployment. For free, build SBCL from source enabling heap saves compression. Then creating SBCL Common Lisp apps produces a fairly small app size, easy to build and distribute. Or, pay for something like LispWorks and creating compact standalone applications is perhaps even easier.

ECL and Chicken Scheme both build with whatever C compiler you're using.

Cool tool! Would be interesting to integrate it straight to Emacs itself. But I think it is cool to be able to copy and paste it to one's own init.el

https://github.com/SystemCrafters/rational-emacs is also a great starting point for new (and why not old) Emacs users who would like to start with at least somewhat preconfigured setup but thinks that doom emacs or spacemacs is a little too much.

Just mentioning that programming language doesn't rule out the option to have declarative syntax for an API.