.NET: Add agent hosting package and update sample (#296)

* Add agent hosting package and update sample * Review feedback and cleanup * Include the narrator * wip * wip * Remove workaround for empty state writes. * Handle changes to AgentThread. * One more. * Fix. --------- Co-authored-by: Aditya Mandaleeka <adityam@microsoft.com>
2026-06-16 21:04:09 +08:00 · 2025-08-06 21:26:36 +00:00
parent 8dcc8533a6
commit e7441ee29e
86 changed files with 4388 additions and 1229 deletions
@@ -0,0 +1,99 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.Text.Json;
+using AgentWebChat.AgentHost;
+using AgentWebChat.AgentHost.Utilities;
+using Microsoft.Agents.Orchestration;
+using Microsoft.Azure.Cosmos;
+using Microsoft.Extensions.AI;
+using Microsoft.Extensions.AI.Agents;
+using Microsoft.Extensions.AI.Agents.Hosting;
+using Microsoft.Extensions.AI.Agents.Runtime.Storage.CosmosDB;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add service defaults & Aspire client integrations.
+builder.AddServiceDefaults();
+builder.Services.AddOpenApi();
+
+// Add services to the container.
+builder.Services.AddProblemDetails();
+
+// Add CosmosDB client integration
+builder.AddAzureCosmosClient("agent-web-chat-cosmosdb", null, CosmosClientOptions =>
+{
+    CosmosClientOptions.ApplicationName = "AgentWebChat";
+    CosmosClientOptions.ConnectionMode = ConnectionMode.Direct;
+    CosmosClientOptions.ConsistencyLevel = ConsistencyLevel.Session;
+    CosmosClientOptions.UseSystemTextJsonSerializerWithOptions = new JsonSerializerOptions()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        TypeInfoResolver = CosmosActorStateJsonContext.Default
+    };
+});
+
+// Configure the chat model and our agent.
+builder.AddKeyedChatClient("chat-model");
+
+builder.AddAIAgent(
+    "pirate",
+    instructions: "You are a pirate. Speak like a pirate",
+    description: "An agent that speaks like a pirate.",
+    chatClientServiceKey: "chat-model");
+
+builder.AddAIAgent("knights-and-knaves", (sp, key) =>
+{
+    var chatClient = sp.GetRequiredKeyedService<IChatClient>("chat-model");
+
+    ChatClientAgent knight = new(
+        chatClient,
+        """
+        You are a knight. This means that you must always tell the truth. Your name is Alice.
+        Bob is standing next to you. Bob is a knave, which means he always lies.
+        When replying, always start with your name (Alice). Eg, "Alice: I am a knight."
+        """, "Alice");
+
+    ChatClientAgent knave = new(
+        chatClient,
+        """
+        You are a knave. This means that you must always lie. Your name is Bob.
+        Alice is standing next to you. Alice is a knight, which means she always tells the truth.
+        When replying, always include your name (Bob). Eg, "Bob: I am a knight."
+        """, "Bob");
+
+    ChatClientAgent narrator = new(
+        chatClient,
+        """
+        You are are the narrator of a puzzle involving knights (who always tell the truth) and knaves (who always lie).
+        The user is going to ask questions and guess whether Alice or Bob is the knight or knave.
+        Alice is standing to one side of you. Alice is a knight, which means she always tells the truth.
+        Bob is standing to the other side of you. Bob is a knave, which means he always lies.
+        When replying, always include your name (Narrator).
+        Once the user has deduced what type (knight or knave) both Alice and Bob are, tell them whether they are right or wrong.
+        If the user asks a general question about their surrounding, make something up which is consistent with the scenario.
+        """, "Narrator");
+
+    return new ConcurrentOrchestration([knight, knave, narrator], name: key);
+});
+
+// Add CosmosDB state storage to override default storage
+builder.Services.AddCosmosActorStateStorage("actor-state-db", "ActorState");
+
+var app = builder.Build();
+
+app.MapOpenApi();
+app.UseSwaggerUI(options =>
+{
+    options.SwaggerEndpoint("/openapi/v1.json", "Agents API");
+});
+
+// Configure the HTTP request pipeline.
+app.UseExceptionHandler();
+
+app.MapActors();
+
+// Map the agents HTTP endpoints
+app.MapAgentDiscovery("/agents");
+
+app.MapDefaultEndpoints();
+app.Run();