Permissions

Can permissions be used for events other than commands?

Do you mean, If player has permission this event will be allowed? If so, yes.

Yes that's what I meant and thank you!

Yes, just do a permission check when the event runs.

PHP:

if ($player->hasPermission("permission.myplugin")){

So I also have to add the permission to the plugin.yml too?

Yes just like you did with your AFKplugin.

Yes, this is the purpose of the new permission system: not limited to commands.

I think the old APi had no permission other then op and default and only for commands.

That's why I think old API permission plugins only block commands.

The old API doesn't have permission. The so-called permissions are just isOp and isBanned. Commands are things added by permission plugin developers.