chore: import upstream snapshot with attribution

2026-07-13 13:21:23 +08:00
commit b957a53def
5423 changed files with 863745 additions and 0 deletions
@@ -0,0 +1,89 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.CommandLine;
+using System.CommandLine.Invocation;
+using System.Reflection;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Agents;
+
+namespace A2A;
+
+public static class Program
+{
+    public static async Task<int> Main(string[] args)
+    {
+        // Create root command with options
+        var rootCommand = new RootCommand("A2AClient");
+        rootCommand.SetHandler(HandleCommandsAsync);
+
+        // Run the command
+        return await rootCommand.InvokeAsync(args);
+    }
+
+    public static async System.Threading.Tasks.Task HandleCommandsAsync(InvocationContext context)
+    {
+        await RunCliAsync();
+    }
+
+    #region private
+    private static async System.Threading.Tasks.Task RunCliAsync()
+    {
+        // Set up the logging
+        using var loggerFactory = LoggerFactory.Create(builder =>
+        {
+            builder.AddConsole();
+            builder.SetMinimumLevel(LogLevel.Information);
+        });
+        var logger = loggerFactory.CreateLogger("A2AClient");
+
+        // Retrieve configuration settings
+        IConfigurationRoot configRoot = new ConfigurationBuilder()
+            .AddEnvironmentVariables()
+            .AddUserSecrets(Assembly.GetExecutingAssembly())
+            .Build();
+        var apiKey = configRoot["A2AClient:ApiKey"] ?? throw new ArgumentException("A2AClient:ApiKey must be provided");
+        var modelId = configRoot["A2AClient:ModelId"] ?? "gpt-4.1";
+        var agentUrls = configRoot["A2AClient:AgentUrls"] ?? "http://localhost:5000/;http://localhost:5001/;http://localhost:5002/";
+
+        // Create the Host agent
+        var hostAgent = new HostClientAgent(logger);
+        await hostAgent.InitializeAgentAsync(modelId, apiKey, agentUrls!.Split(";"));
+        AgentThread thread = new ChatHistoryAgentThread();
+        try
+        {
+            while (true)
+            {
+                // Get user message
+                Console.Write("\nUser (:q or quit to exit): ");
+                string? message = Console.ReadLine();
+                if (string.IsNullOrWhiteSpace(message))
+                {
+                    Console.WriteLine("Request cannot be empty.");
+                    continue;
+                }
+
+                if (message is ":q" or "quit")
+                {
+                    break;
+                }
+
+                await foreach (AgentResponseItem<ChatMessageContent> response in hostAgent.Agent!.InvokeAsync(message, thread))
+                {
+                    Console.ForegroundColor = ConsoleColor.Cyan;
+                    Console.WriteLine($"\nAgent: {response.Message.Content}");
+                    Console.ResetColor();
+
+                    thread = response.Thread;
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "An error occurred while running the A2AClient");
+            return;
+        }
+    }
+    #endregion
+}