Three origin drifters, each placed at For(CombatSeed, ScatterStream, k) within half the radius;
a galaxy seed whose ContinueStep item seed wraps to zero is refused.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
DeterminismLedgerTests (a RunStartTests partial): ItemManager refuses seed 0;
ItemSeed is the run seed and step; the unpack scatter ignores the item stream
and differs per zone; the SimulationDice streams are distinct; scenario Ids are
unique kebab; a two-AI fight is one history, and its digest is pinned for
linux-x64 (pin lands in the next commit).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
