There's no way I can port the snippets plugin without having a friendly hello world as reference.

Thus, port the hello world plugin to the new interfaces.
Plus some remotely consistent formatting, because all the lines change anyways.

Since the hello world plugin isn't built, I'm pretty sure that the feature freeze doesn't apply to it :P

Oh, and hi Kate community! I still need to decide whether I want to subscribe to yet another mailing list, please bear with my invisibility until then.