You might be already aware of it and this might be out of scope but there is a language server protocol (LSP) plugin for sublime : https://github.com/tomv564/LSP

Sorry if it is the wrong repo to post about sublime but I wondered how easy would it be to reuse what you did here and hook it up with sublime.

For example according to sublime LSP plugin doc here : https://lsp.readthedocs.io/en/latest/ you need to specify the path to the LSP executable. Is it what https://github.com/vshaxe/haxe-languageserver produce ?