Catching a bad change before it ships
For the engineer holding the change window.
A three-line OSPF change that passed peer review, shown twice: pushed straight to the network, then checked with Hammerhead first.
The labs are synthetic and small. The push at 01:48 is a labelled dramatization of what the model says would happen. The Rogers 2022 segment is a reconstruction from the public record; the demo does not claim Hammerhead would have prevented that outage.