Definition
An engineering mechanism that implements a halt: it trips when a risk indicator crosses a set point, such as a surge in challenges, a bias metric, or a growing backlog of harm not yet repaired, and halts the decision path that indicator watches, for everyone in it. They are the safety counterpart to financial circuit breakers.
The breaker is the mechanism; the halt is what it does. Name the breaker only when describing the mechanism, and say which decision path it halts. A halt is measured by time to halt, its authority is tiered by halt stratification, and holding a single case while a person looks is a pause, not a halt.
Diagnostic