At the bare minimum I'm looking at syntax highlighting and autocompletion. But a very very nice-to-have would be to have validation against a shapes graph on board as well (CLI tool would also be fine).

https://github.com/BruJu/shacled-turtle

though it’s arguably more of a prototype

Thanks, I'll check it out

I'm just really surprised I cannot find any plugin for even something like VS Code that supports auto-completion 😞