//! Layer 3: Subnets & Hierarchy for Net.
//!
//! Subnets are label-based — nodes belong by identity/capability, not
//! static configuration. The hierarchy is encoded as 4 levels of 8 bits
//! each in the `subnet_id: u32` header field. Gateway nodes enforce
//! visibility policy at subnet boundaries.
pub use ;
pub use SubnetError;
pub use ;
pub use SubnetId;