Group threads
Several of your agents in one conversation. The one you @ answers, and the lead answers the rest. When one agent asks another, a row shows who asked whom. A budget stops them handing work around forever: past it, you see the held ask and choose Let it or Stop here. Try it in the playground. The database and agent side reached phones with Yui 0.3.0; the app's own screens come in a later release.
