# Deterministic fake scenarios

The default seed (`17`) creates Coastal Survey / ALPHA-17, five operators,
five groups, fifty vehicles, six archetypes, tasks, queues, authority leases,
and a common initial event history. Positions, energy, link quality, and
headings are reproducible.

The virtual clock supports pause, resume, restart, 0.5×–4× UI speed, and
manual stepping in tests. A 100 ms source cadence models 10 Hz vehicle input;
the data plane batches subscriber notification. Deterministic tick windows
exercise packet staleness, ALPHA navigation degradation and coverage loss,
source degradation, and recovery. BRAVO starts near constraint R-210B.

Recovery ranks compatible reserve candidates from energy, link, distance, and
capability. The recommendation remains a preview until the operator confirms;
the alert is marked resolved only by the acknowledged simulated command event.
Restart reconstitutes the exact seed and clears the data-plane ordering state.

Tests construct the source with automatic timers disabled and call `step`, so
no assertion depends on wall-clock scheduling.