The DSL itself is pretty nice. However, one thing I found annoying is that the printing function itself is hard to unit test: there is no easy way to instantiate its parameters (in particular the `ASTPath` class). So I relied on testing it by calling `Prettier.format()`, which is more a end-to-end test of the whole plugin. Maybe I'll figure out another solution at some point.
Thanks for the idea, I'd not considered it. LaTex may have some use, I'll take a look. Indeed, probably the best solution to publish a game with diagrams.
For personal notes, I would also consider embedding PGN into Markdown. Sadly, PGN rendering in Markdown isn't supported yet, as far as I know (something like Mermaid would be awesome).
By the way, something I've considered but not implemented yet are options to tweak the formatting (for instance, whether to indent or inline comments / variations). The Prettier approach is to be opinionated, but some language-specific options may be useful.
