Once the circleci-yaml-language-server process is started by a vscode window, it never seems to exit, even when that vscode workspace / window is closed, nor when vscode is completely quit. I end up with dozens of orphaned copies of this process floating around on my machine.
It’s not a case of “oh it will idle out after a few minutes” either, when I discovered this, many of them had been hanging around for weeks past when their originating vscode instance had been quit.