Where it's going
The inbox is the first voice.
Noise is anything that reaches you that you did not start: the message, the invitation, the mention. Brood starts with mail, in Gmail and Google Workspace, because it is the loudest channel most people have. It is where Brood begins, not where it ends.
Next, the tools you already work in.
What Brood learns about who writes to you will reach the places you already work: a command line, and a connection for the AI assistant you already use, so it can read what Brood has learned about your mail and answer you from it.
Both ask the same questions of the same record. Your assistant can only read it. The command line can also quiet a sender, as the app does, but only once you give it that permission.
Then the calendar.
Every invitation is noise of its own: someone else deciding where an hour of yours goes. The calendar is the next channel Brood means to quiet, with the same restraint, and the same habit of proposing before it acts.
After that, the loudest one.
Beyond those, Brood goes where the people using it say the noise is worst. That is a question, not a plan, and the list is where we ask it.
When you join, tell us where your mail lives if it is not with Google. Where people's mail lives decides where Brood goes next.