Thanks for your feedback!
1. I wrote it down. I have plan to make my tool as plug-in for different text editor tool including VsCode or Obsidian. Now, I know someone want it on Jupyter notebooks.
2. Simulation is on my roadmap too. Even though, simulation is much hard than a note-taking tool, I will try it.
I'm guessing VSCode is a good place to start. There's a lot of recent movement towards using VSCode as the preferred environment for working on Jupyter notebooks.
Thanks for your feedback!