New Inform 7 extensions site

This post brought up some questions for me.

I’d be happy to add Daniel Stelzer’s extension to the new extensions site, however:

How do I confirm that it has the proper license? As far as I know it’s only on Github, not in the public library. Do I need to get permission from the author to add it?

Also, I’m still not totally sure what the implications are of tagging it with an Inform version. I’m still wondering about the answer to this question:

Do I need to test it myself to verify that it works? Do I need to ask the author whether it’s going to be supported?