Probably, though we only have it for vscode, I'm not sure what APIs other editors offer to do this

I'm pretty sure you need to extend the protocol and have some extra code in the extension. We have some for ELP

github.com/WhatsApp/erl...

Cookie isn't a security mechanism, just a way to separate networks. And no, you don't need the same cookie for all nodes, see set_cookie/2 www.erlang.org/doc/apps/ert...

Have you seen? github.com/WhatsApp/erl...

It could use a lot more docs, but it's essentially a way to allowlist traffic between nodes in a cluster, not all the way there for what you want, but a step in that direction