coffeeshop-agent

# coffeeshop-agent .NET Agents technologies  > This is a demonstration application. Certain scenarios presented may be unrealistic or not suitable for real-world use. Please do not replicate or deploy this in a production environment. ## High level architecture ```mermaid graph TD subgraph "Identity Provider" EntraID[Microsoft Entra ID] end subgraph "User Interaction" WebApp[ChatApp <br> - A2A Client] end subgraph "Orchestration" AppHost end subgraph "Backend Services" Counter[CounterService <br> - A2A Server/Client, MCP Client] Barista[BaristaService <br> - A2A Server] Kitchen[KitchenService <br> - A2A Server] ProductCatalog[ProductCatalogService <br> - MCP Server] end subgraph "Shared Infrastructure" ServiceDefaults end %% Core Interactions WebApp -- "A2A Protocol" --> Counter Counter -- "A2A Protocol" --> Barista Counter -- "A2A Protocol" --> Kitchen Counter -- "MCP Protocol" --> ProductCatalog %% Authentication & Authorization EntraID -- "Secures" --> WebApp EntraID -- "Secures" --> Counter EntraID -- "Secures" --> Barista EntraID -- "Secures" --> Kitchen EntraID -- "Secures" --> ProductCatalog %% Development-time Orchestration AppHost -.-> WebApp AppHost -.-> Counter AppHost -.-> Barista AppHost -.-> Kitchen AppHost -.-> ProductCatalog %% Shared Dependencies WebApp -- "Uses" --> ServiceDefaults Counter -- "Uses" --> ServiceDefaults Barista -- "Uses" --> ServiceDefaults Kitchen -- "Uses" --> ServiceDefaults ProductCatalog -- "Uses" --> ServiceDefaults class WebApp user; class Counter,Barista,Kitchen,ProductCatalog backend; class AppHost orchestrator; class ServiceDefaults shared; class EntraID identity; ``` ## Get starting ``` dotnet run ``` Access to .NET Aspire dashboard, then open the web, and from the chat box type: ``` a black coffee pls ``` ``` I want a black coffee, cappuccino, latte, 2 chicken meat balls and 2 cake pops. ``` ## MCP ``` npx @modelcontextprotocol/inspector ``` ``` http://localhost:5001/mcp/sse ``` ``` http://localhost:5001/.well-known/oauth-protected-resource ``` ## A2A ```sh $Env:GEMINI_API_KEY = '<key>'; agentgateway -f .\agentgateway\config.yaml ``` ``` http://localhost:5000/.well-known/agent.json ``` ## TODO - [ ] Semantic Caching with Semantic Kernel: https://share.google/aimode/gxqpWpfekktrOidbr - [ ] Microsoft.Extensions.AI + Ollama: https://learn.microsoft.com/en-us/dotnet/ai/microsoft-extensions-ai#tool-calling ## References - https://github.com/thangchung/practical-dotnet-aspire - https://github.com/thangchung/mcp-labs/blob/feat/a2a_mcp_auth/a2a_mcp_auth_dotnet - https://devblogs.microsoft.com/foundry/building-ai-agents-a2a-dotnet-sdk/ - https://devblogs.microsoft.com/dotnet/build-a-model-context-protocol-mcp-server-in-csharp/ - https://devblogs.microsoft.com/dotnet/announcing-dotnet-ai-template-preview1/