v3.0.0 - Living Persistent World + cross-language surfaces + multiplayer core
Deterministic server-authoritative world engine: Any-System ruleset AST, world snapshot+replay, offline Epoch tick, fail-closed suspend/resume, and the real-time multiplayer core (command frames + rollback reconciliation + region hashing). One Rust core, byte-identical across TypeScript (npm), WASM, PyO3, and a C ABI.