Dune is a shell designed for powerful scripting. Think of it as an unholy combination of bash and Lisp.

I may never use this but I am glad it exists.

Edit: Oh heck this is a repost, it was submitted two years ago here: https://lobste.rs/s/iqnasv/dune_shell_by_beach . Don’t know how much it’s changed since then.

There’s already lish, written in Common Lisp, which does the same thing even more efficiently, I think.