//! Sync subsystem — staging and reconciliation of authority events.
//!
//! Three-layer state model (API.md §12):
//! 1. Canonical Truth — owned by authority (spacetime or local)
//! 2. Client Mirror — read-optimized snapshot for runtime
//! 3. Presentation — interpolated/render-only state (fabric + gpu)
//!
//! Rules:
//! - Authority updates staged first, applied at tick boundary
//! - Presentation interpolates through correction
//! - No direct write from network thread into scene/render data
pub use reconcile;
pub use StagingBuffer;