My echobot restarter daemon mechanism is far too bespoke and complicated. Switching to the well-tested mission-control is my task for the next few days.

    echobot: script that starts dbus-daemon and relies on
             service activation for everything else.
    o.fd.T.EchobotController: service that starts M.C. and
             attempts to bring accounts online. Also listens
             for and accepts incoming subscription requests.
    o.fd.T.Client.TextEcho: handles text chats and commands
    o.fd.T.Client.StreamedMediaEcho: handles StreamedMedia
             channels and uses hints to determine whether to
             echo, identity, playsong, storytime, ... them.
    mission-control: does what it does best.