Integration-level AsyncLocal + ASP.NET middleware + PipelinePolicy. Forwards x-aimock-* headers from incoming AG-UI requests to outgoing OpenAI calls. Stopgap until copilotkit-sdk-dotnet ships.
The showcase framework directories better reflect their role as integration examples rather than distributable packages. Renames showcase/packages/ -> showcase/integrations/ and updates the test docker-compose file reference accordingly.