mod_service_outage_status: XEP-0455: Service Outage Status Only the out of band part so far. The in-band pubsub part would need '+notify' support in mod_pubsub, since mod_pep does not serve the bare-host-JID. All the hard parts of this XEP is elsewhere, i.e. hosting the document somewhere reliable.

module:hook("message/host", function (event)
	local stanza = event.stanza;
	if #stanza.tags == 1 and stanza.tags[1].attr.xmlns == "http://jabber.org/protocol/chatstates" then
		return true;
	end
end, -10);