Kakoune doesn't come with any of these built in, however kak-lsp [1], the language server protocol client implementation, is fairly mature, and I wouldn't be su

Kakoune doesn't come with any of these built in, however kak-lsp [1], the language server protocol client implementation, is fairly mature, and I wouldn't be surprised if it supported inline doc lookups. Certainly kakoune provides the facilities needed to implement that. Cross-file grepping, and fancy fuzzy finders are considered beyond the scope of the editor, but the wiki has some tips for integrating a separate fuzzy finder program into kakoune [2]. Emmet would be super easy to implement but it just hasn't been yet to my knowledge. [1] https://github.com/ul/kak-lsp https://github.com/ul/kak-lsp [2] https://github.com/mawww/kakoune/wiki/Fuzzy-finder https://github.com/mawww/kakoune/wiki/Fuzzy-finder