//! Graph module for hexagonal architecture introspection.
//!
//! This module provides the graph-based introspection system for analyzing
//! hexagonal architecture. It includes immutable graph structures, nodes,
//! edges, builders, and metadata. Future phases will add query APIs,
//! analysis algorithms, and visualization capabilities.
//!
//! Revision History
//! - 2025-10-01T00:03:00Z @AI: Phase 2 implementation with graph core.
//! - 2025-10-01T00:00:00Z @AI: Initial placeholder for graph module structure.
pub use GraphBuilder;
pub use HexEdge;
pub use HexGraph;
pub use HexNode;
pub use Layer;
pub use GraphMetadata;
pub use NodeId;
pub use Relationship;
pub use Role;