Public writable log
In order to ease interactions with the angels, we need to give everyone present under the tea house at any time the means to make a decision on the whole tea house behalf. And we need a way to make the information flow.
Besides daily short briefing (probably around noon/breakfast), we need a public log of events in append only. And we need it to be available at all time for anyone to complete it. It could be nice if it's water proof, but not mandatory.