I'm curious about what's the comment in Markdown file? other langauge comment is using tree-sitter.

I am not quite get the question, but like I write before I cannot use this cmd+/ command shortcut to comment out a line and I have to manually type it.

<!-- This is comment-->

If I may to contribute to solve this. In which file should I start?

because，previously, i don't known what's the comment in Markdown file. And then I searched, <!-- This is comment --> might is extension grammar of markdown.

you can add block_comment = ["<!-- ", " -->"] in file crates/languages/src/markdown/config.toml, I am not sure if this is acceptable.

I tested, there is an crashed when you toggle comment with markdown where exists non-english language in comment line.

you can try and debug it.