treat query/**.scm as query

[Freed-Wu]

According to https://tree-sitter.github.io/tree-sitter/syntax-highlighting#queries:

Syntax highlighting is controlled by three different types of query files that are usually included in the queries folder. The default names for the query files use the .scm file. We chose this extension because it commonly used for files written in Scheme, a popular dialect of Lisp, and these query files use a Lisp-like syntax.

So how about add a ftdetect/query.vim to higlight all query scm to query?

augroup XXX
  autocmd!
  autocmd BufNewFile,BufRead */queries/*/*.scm setfiletype query
augroup END

[theHamsta]

nvim-treesitter has removed all ftdetect files. These should be managed by upstream vim/vim or neovim/neovim. For Neovim, the following rule has already been added https://github.com/neovim/neovim/blob/607606e3bb7a435ac5a0eba2eb4abde8eff774bb/runtime/lua/vim/filetype.lua#L1913

[Freed-Wu]

I found why it cannot work for me. https://github.com/sheerun/vim-polyglot/blob/master/autoload/polyglot/init.vim#L627:

if !has_key(g:polyglot_is_disabled, 'scheme')
  au BufNewFile,BufRead *.scm,*.ss setf scheme
endif

[Freed-Wu]

And https://github.com/sheerun/vim-polyglot/blob/master/extras/filetype.vim#L1724:

" Scheme
au BufNewFile,BufRead *.scm,*.ss,*.sld,*.rkt,*.rktd,*.rktl 	setf scheme

[clason]

Yes, avoid polyglot like the plague. Neovim already has (correct) built-in detection for query files, you don't need to (and shouldn't do) anything.