nuwiki/ftdetect/nuwiki.vim

" ftdetect/nuwiki.vim — associate *.wiki files with the `vimwiki` filetype.
"
" Users who configure a custom `file_extension` in setup() should add their
" own `:autocmd BufRead,BufNewFile *.myext setfiletype vimwiki` mapping;
" we hardcode `.wiki` since ftdetect runs before any user setup() call.
"
" Use `set filetype=…` (not `setfiletype`) so we override Neovim's bundled
" `*.wiki → mediawiki` rule. Users who actually want MediaWiki on .wiki
" can override this with their own autocmd at a later runtimepath entry,
" or with `vim.filetype.add` in Neovim.

autocmd! BufRead,BufNewFile *.wiki set filetype=vimwiki