type EntityId
Runtime identity of a simulated thing.
Two flavors, deliberately distinguishable at a glance:
@g:milky-way/s:SOL/b:2 — a generated entity, identity is its address
#7 — a dynamic entity (player ship, spawned object)
Dynamic ids come from a counter that lives in the save file rather than from a UUID: a random id would make two replays of the same session disagree, and the counter is exactly as unique while staying deterministic.
universe/src/address.ts:384