interactive feedback on currently open grammar file ?

[asmodehn]

Would it be feasible to add a feature for the user to check his grammar in the editor ?

I am thinking something along the lines of https://omrelli.ug/nearley-playground/ that provides an interactive feedback to the user creating a grammar, via examples. Or maybe being able to use the lark for syntax highlighting in other open files...

Of course, many kind of visualisations are possible (showing parse trees, etc.). The point here is to get some bare minimum of interactive feedback directly in the editor, without having to code anything.