Runnable examples that demonstrate narrow SDK contracts without becoming production entry points.
harness_contract_decode.rs— Decode oneTrackedTaskJSON value through medulla's Rust harness mirror.mock_link_forwarder.rs— A blind loopback UDP forwarder implementingdocs/host-link-protocol.md§5, standing in for the backend in the coordination e2e harness.coordination_owner.rs— The orchestrator end of that harness: enrolls a pair, then dispatches task frames over the host link and prints the terminal frame as JSON.
Keep this index synchronized when responsibilities move. Put shared data structures in types.rs, focused unit tests in tests.rs or a sibling _tests.rs, and preserve the module-level Rust documentation as the API source of truth.