[schemescape]

There are a few that take that approach, but people usually want one in their preferred programming language/runtime. Examples:

Metalsmith (Node/JS): https://metalsmith.io/

Haunt (Guile Scheme): https://dthompson.us/projects/haunt.html

I’m sure there are many more.

[ahazred8ta]

A while ago you were looking at small languages such as lua - there's also micropython. https://docs.micropython.org/en/latest/