I did find a longish youtube video on it so I’ll get into that

I need to read and write some short examples, and bind them to keys, and learn how to get keys to be aware of what kind of file you’re editing

(kennings? is that kennings?)

finally I think I need to figure out what’s the best guide to the VS Code api concepts that are most relevant for hacking one’s editor

I think it's usually best to start with the problem you'd like to solve

Yeah that makes sense. I’m watching yours and PEZ’s talk, and discovered https://code.visualstudio.com/api/extension-capabilities/overview which is breaking up the API nicely