Strong @Kartik Agaram vibes in this intro:

A self-explaining computing system would need a high-level programming language. Cant is meant to be both the main language you use in this fantasized environment and the language it's mainly written in.

https://github.com/darius/cant/blob/master/guide.md

I know Darius, but wow I hadn't come across this yet. Need to spend more time talking to my friends.