@startuml
[SessionOrchestratorIntegrationTest] -> [DefaultSessionOrchestrator] : run(sessionId, graph, config)
[DefaultSessionOrchestrator] --> [EventStore] : append events
[DefaultSessionOrchestrator] --> [MockEngines] : resolve/infer/validate/approve
[Test] <- [EventStore] : read events
[Test] <- [SessionRepository] : get session state

[ValidationPipelineIntegrationTest] -> [ValidationPipeline] : validate(payload)
[ValidationPipeline] -> [MockValidator1] : validate
[ValidationPipeline] -> [MockValidator2] : validate
[MockValidator*] --> [ValidationPipeline] : ValidationSection
[Test] <- [ValidationPipeline] : ValidationReport
@enduml