S1 is urgent after half an hour for a control node (the node running mesh-controller). S9 also hears the bus module's slow consumers and closed connections, each closure counted once. S21 is one finding per heard machine from its failed haves and its provisioner clients' reports (PROV_APPLIED). DEAD_LETTERS is counted again at a letter's age and every five minutes while letters are held, on the watchman's own pulse. needs-operator waits for L6: its inputs are not on the bus. Pins mesh-sdk b6ef01d.