Hi @toshan1603 just replied to your email. Posting the feedback I got from Ben Fry about Language Server for Processing so other can see it too.
“One thing would be that we’d ideally have it written in Java—the previous approach had been this Node-based setup which makes things really messy: we’d have all of Java-based Processing, plus a Node/Electron app to do the LS, and then another Node/Electron app that was the editor (whether VS Code or Atom or a mini PDE that we write). We really just want a Java version of the Language Server which can then be used by these other apps.”