This project is a language server extension for coc.nvim.
Originally, this project started from another F# language server but I find it hard to keep up with the changes. Now this project is essentially a thin wrapper around FSAutoComplete.
:set ft=
and if the result is not "fsharp", it doesn't trigger plugin initialization. Use something like https://github.com/sheerun/vim-polyglot:CocInstall coc-fsharp
:CocInfo
project_root/obj/project.assets.json