> Hello Randy, thanks for having a look! Could you tell me which
> tree-sitter grammar you are using? I'm asking because with the grammar
> from https://github.com/ikatyang/tree-sitter-yaml I don't see what you
> describe.

For the record I'm also using this grammar.

Looking at the patch, what do you think about retaining the existing 
behavior (so block_scalars still fill correctly) while inhibiting 
fill_paragraph for everything else as suggested? Originally I retained 
the existing behavior of fill-paragraph just to limit the number of 
things changed by the patch, not because it was working properly. I 
think blocking the call to fill-paragraph for non-block/comment nodes 
makes sense.

I attached a patch w/ my edits, but it just swaps the when to and if, 
accepts the comment node type for filling, and returns t to avoid 
calling fill-paragraph for other nodes.