this has come a long way over the last year and definitely worth trying again! https://executablebooks.org/en/latest/blog/2023-02-09-announce-mystjs/#myst-will-have-first-class-support-in-javascript

Can we get this added to the env soon please. I'm using it in #180

Looking forward to your feedback on the myst plugin!! It now works in JupyterLab v4 and supports a few more jupyterbook directives like glossaries, terms, exercises, and proofs. Let us know what else you all need! :)

I'm excited to try out Exercises. Is that supported on the sphinx build too?

Yep!

• jupyterlab verion: https://mystmd.org/guide/exercises
• sphinx version: https://ebp-sphinx-exercise.readthedocs.io/en/latest/