//! Reactive dependency tracking and expression evaluation.
//!
//! This module tracks which nodes depend on which state paths, so that
//! state changes only re-render affected subtrees.
//!
//! Most types here are internal — SDK authors interact with reactivity
//! indirectly through [`Engine`](crate::Engine) and `WasmEngine`.
pub use ;
pub use ;
pub use DependencyGraph;
pub use Scheduler;