> "More powerful editors like Cider and Cursive manage to do this with some very complex machinery that I could never duplicate. Instead, I decided to rethink the problem. Since Nightlight runs inside the same process as your project, code completion and other advanced features are trivial to implement."

How? What makes it easier to implement code completion when the IDE is running inside your project's JVM? Clojure is still a dynamic language, which means you'll never fully know what vars make actual sense in a given context. For example what vars in the current context make sense as arguments to the function you're about to call, when you have no idea what the type signature of that function is (which may even be a variable). Unless, do you mean very simple context-less code completion? That's what CIDER does, and presumably Cursive too, but they just do it by asking the process on the other end of the nREPL server for more details, and the plugins for these have access to the same JVM.