is there a way to run or connect to a Node.js REPL. I can't seem to find any documentation on that.

ok, got it to work with these instructions: https://github.com/cursive-ide/cursive/issues/835

they are a bit outdated though, as you don't need to add clojurescript jar as a library anymore

I keep getting messages about "Your project requires namespaces which need stubs to be generated." Anyone know what this is?