At one point I tried embedding a language server in a running IntelliJ process. It kind of worked, but a few problems led to me getting tired of maintaining it:

At one point I tried embedding a language server in a running IntelliJ process. It kind of worked, but a few problems led to me getting tired of maintaining it: - Constant API updates to IntelliJ internals requiring updates to the extension. - The need to run a full copy of IntelliJ in the background, and breakage in the copy leading to requiring a full restart. - A lot of concurrency problems I didn't understand because by necessity it required going deep into IntelliJ's codebase. - I was no longer using Java in my work environment or for personal projects, so I had no need to use IntelliJ. But despite this, the repo stands as the most-starred one I have. People are still starring it even though I haven't made changes in over a year and a half! https://github.com/Ruin0x11/intellij-lsp-server https://github.com/Ruin0x11/intellij-lsp-server So it sounds like this is a thing people would use, if someone wants to take up the maintenance burden.