That’s a very good question. It’s a bit more stupid than that in Calva, and nbb can only be a project type without any cljsType.

i would like calva to do that 2 repl thing with bb and nbb and evaluate js stuff with nbb. How do i go about doing that? tried specifiying nbb as the cljstype and it failed

I don’t think you can. Or maybe there is a way, but it ain’t trivial. I think you will need to use two VS Code windows. And probably Workspaces if the bb and nbb stuff share project root.

You are welcome to file an issue about it. I don’t think we have bandwidth to actually do anything about it right now. But it is good to have it on the radar.