What problem does it solve? It helps developers understand, verify, and occasionally extend the templated Outbox Relay host integration tests in a CoreEx *.Test.Relay project, avoiding unnecessary new test code and misdiagnosed environment failures. ## Core Features & Use Cases - Relay Forwarding Verification: Confirms the background relay service forwards outbox-written events to the expected Service Bus topic/subscription using provider-specific publishers (PostgresOutboxPublisher or SqlServerOutboxPublisher). - Hosted-Service Management Checks: Tests pause, resume, and status endpoints of the relay hosted service over plain HTTP. - Failure Diagnosis: Explains Service Bus emulator "entity not found" errors as environment configuration problems rather than test defects. - Use Case: You add a new domain to a CoreEx solution and need to confirm the generated RelayTests.cs already covers outbox forwarding before writing any additional relay test scenarios. ## Quick Start Ask the assistant to verify that the relay test in your *.Test.Relay project forwards outbox events to the Service Bus topic and to diagnose any emulator entity-not-found failure.