sly is apparently archived: might want/need to replace eventually

[yarikoptic]

https://github.com/dabeaz/sly says

Important Notice : December 21, 2025

I've decided to retire the SLY project. No further maintenance is expected. There are many high quality parsing libraries available for Python that you might consider instead. Or you could keep using SLY by copying it into code. Or you could write a hand-rolled recursive descent parser (which can be a lot of fun). I don't have a specific recommendation.

I guess if works -- could keep working, just wanted to make sure it didn't go unnoticed