Inspection snapshots and the scriptable game harness.

The authority port: who owns the simulation a client is part of, and the local implementation of it.

Save/load: deterministic base universe plus versioned mutations.

Keplerian orbital mechanics and 6-DoF rigid body integration.

Hash-based PRNG and hierarchical deterministic seed derivation.

Versioned, validated wire and save schemas.

Canonical-to-render coordinate bridge, floating origin and LOD.

Units, branded identifiers, invariants and structured logging.

Fixed-timestep simulation core: clock, entities and systems.

Universe coordinates, reference frames and render rebasing.

Universe addressing, star catalog and deterministic generation.

Typed task contracts, worker transport ports and a job pool.