For doing something similar in a browser, klipse supports over a dozen languages - https://github.com/viebel/klipse

Oh, this will be great for interactive environment setup. Getting started with some of our current projects is like summoning Cthulhu and I could see us using this to set up a guided process for it.

I can see the resemblance to Notebooks/RMarkdown, but integrating it into a terminal session is a neat idea. I've not had chance to try it (I'm on Windows) but it seems really cool.

org-babel has this down really well for org-mode markup you're into the Emacs ecosystem. I've been using it for a little over a year now for notes and documentation.

I don't get it. Any capable editor/IDE should be able to send markdown code blocks to a terminal pane, letting you work in the comfort of your standard dev environment. What's the point of a dedicated application just for this purpose?

Similar, (plug) https://github.com/khalidx/runbook. Nice CLI with search, and supports many languages.

Also take a look at https://github.com/davidbrochart/nbterm

If you're really old, you'll remember MPW - Macintosh Programmer's workshop.

Commands used the editing document for both input and output.

This is pretty cool, but I couldn't see if there was a way to interactively edit the line before executing

RMarkdown (and now Quarto) has had this for half a decade now and emacs org-mode for two decades.

Alternatively you could use a jupyter notebook with a bash kernel, yeah?