Problem

1. Ken on server A created an issue to Lennon's repository on server B.
2. Mandy on server B is a contributor to Lennon's repository.
3. Oprah on server C is also a contributor to Lenonn's repository.
4. Who should have the permission to close the issue? And how?

@tantek has experience on Github bridging. And he has some insight about cross domain permission handling. He raised interesting point in the ActivityPub community group meeting tonight that lead me thinking of this problem. (I think @cwebber tried to raise the same point but I was too stupid to pick up.)

The same problem also applies to a PR. Do we handle it? Or do we omit it?