Type Alias: HandlerClock

type HandlerClock = Pick<Clock, "now" | "sleep">;

The slice of the clock handed to job handlers.

Deliberately narrower than Clock: deadline is a liveness primitive, and a handler that built one against a pinned clock would hang rather than time out. Handlers get to read time and to wait, nothing else.

sleep is for short in-handler coordination — backing off around a flaky dependency, spacing retries within one job. Long or business-meaningful waits belong in the process as BPMN timers, where they survive a crash and are visible to operations.