# @suaveplan/network-plugin-relay - Cross-mesh relay: relay router, host-backbone transport, cross-mesh envelope schema, mesh directory, loop-prevention guard, manager

## Summary

Cross-mesh relay — the federation layer that lets Tier 0 hosts of different meshes route messages to each other. Composes `RelayRouter`, `HostBackboneTransport` (Tier 0 ↔ Tier 0), `CrossMeshEnvelope` (Zod-validated), `MeshDirectory` (host lookup), `LoopGuard` (hopCount/ttl/visitedNodes), and `RelayManager` (plugin entry point).

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## Documentation tree

- [backbone](./src/backbone/host-backbone-transport.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
  - [host-backbone-transport](./src/backbone/host-backbone-transport.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
  - [mesh-directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
  - [cross-mesh-envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [loop-prevention](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
  - [loop-guard](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
  - [relay-manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
  - [relay-router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [error-codes](./src/error-codes.md) — Frozen registry of error codes for the network-plugin-relay plugin. Five codes cover the full surface: `ROUTE_NOT_FOUND…
<!-- end:auto-docs -->  - [host-backbone-transport](./src/backbone/host-backbone-transport.md) — <!-- begin:auto-docs --> _(no submodules)_- [directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [mesh-directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [cross-mesh-envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-prevention](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-guard](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [relay-manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [relay-router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/error-codes.md) — Frozen registry of error codes for the network-plugin-relay plugin. Five codes cover the full surface: `ROUTE_NOT_FOUND…
- [host-backbone-transport](./src/backbone/host-backbone-transport.md) — <!-- begin:auto-docs --> _(no submodules)_- [directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [mesh-directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [cross-mesh-envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-prevention](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-guard](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [relay-manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [relay-router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/error-codes.md) — Frozen registry of error codes for the network-plugin-relay plugin. Five codes cover the full surface: `ROUTE_NOT_FOUND…
- [host-backbone-transport](./src/backbone/host-backbone-transport.md) — <!-- begin:auto-docs --> _(no submodules)_- [directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [mesh-directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [cross-mesh-envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-prevention](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-guard](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [relay-manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [relay-router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/error-codes.md) — Frozen registry of error codes for the network-plugin-relay plugin. Five codes cover the full surface: `ROUTE_NOT_FOUND…
- [host-backbone-transport](./src/backbone/host-backbone-transport.md) — <!-- begin:auto-docs --> _(no submodules)_- [directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_  - [mesh-directory](./src/directory/mesh-directory.md) — <!-- begin:auto-docs --> _(no submodules)_- [envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_  - [cross-mesh-envelope](./src/envelope/cross-mesh-envelope.md) — <!-- begin:auto-docs --> _(no submodules)_- [loop-prevention](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_  - [loop-guard](./src/loop-prevention/loop-guard.md) — <!-- begin:auto-docs --> _(no submodules)_- [manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_  - [relay-manager](./src/manager/relay-manager.md) — <!-- begin:auto-docs --> _(no submodules)_- [router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_  - [relay-router](./src/router/relay-router.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/error-codes.md) — Frozen registry of error codes for the network-plugin-relay plugin. Five codes cover the full surface: `ROUTE_NOT_FOUND…