[nine_k]

I think "implementing higher level features as extensions on top of a smaller core" is a hallmark of the Lisp family. Check out Fennel [0] or Janet [1] for two different approaches. On top of everything, Fennel is 100% Lua-compatible.

[0]: https://fennel-lang.org/

[1]: https://janet-lang.org/

[mostafah]

I agree. Emacs and its Emacs Lisp are one of the best examples of this design. Thank you for the links.

[nine_k]

As an avid Emacs user, can't but agree :)