I keep bouncing the idea around of building a core in C or Rust then writing everything atop it using Janet. I love how readable lisps are (with macros, you can really move up the abstraction ladder quickly) and working on a live image should make iteration a breeze in an LLM.
Folks have found it useful to just point gippity at the page and ask questions
I built a OCaml core with a webserver - then made my scripting language on top a custom scheme. I love your idea! I think you would find that a solid interpreted language living in a webserver is an extremely useful think to have. Let me know if you build it!
Interesting take and similar to something I've recently been working on. Have a look at janet-num.[1] Plain numeric C kernels under Janet.
Janet for orchestration, C for the frame loop.
[1] https://github.com/jennystats/janet-num