chore: import upstream snapshot with attribution

2026-07-13 13:39:25 +08:00
commit db620d33df
5151 changed files with 925932 additions and 0 deletions
@@ -0,0 +1,125 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Azure.AI.Projects;
+using Azure.Identity;
+using Microsoft.Agents.AI;
+using Microsoft.Agents.AI.Workflows;
+using Microsoft.Extensions.AI;
+
+string endpoint = Environment.GetEnvironmentVariable("FOUNDRY_PROJECT_ENDPOINT")
+            ?? throw new InvalidOperationException("FOUNDRY_PROJECT_ENDPOINT is not set.");
+string deploymentName = Environment.GetEnvironmentVariable("FOUNDRY_MODEL") ?? "gpt-5.4-mini";
+
+// WARNING: DefaultAzureCredential is convenient for development but requires careful consideration in production.
+// In production, consider using a specific credential (e.g., ManagedIdentityCredential) to avoid
+// latency issues, unintended credential probing, and potential security risks from fallback mechanisms.
+AIProjectClient projectClient = new(new Uri(endpoint), new DefaultAzureCredential());
+
+IChatClient chatClient = projectClient.ProjectOpenAIClient
+                                      .GetChatClient(deploymentName)
+                                      .AsIChatClient();
+
+Workflow workflow = CreateWorkflow(chatClient);
+
+await RunWorkflowAsync(workflow).ConfigureAwait(false);
+
+static Workflow CreateWorkflow(IChatClient chatClient)
+{
+    AgentRegistry agents = new(chatClient);
+
+    HandoffWorkflowBuilder handoffBuilder = AgentWorkflowBuilder.CreateHandoffBuilderWith(agents.IntakeAgent);
+
+    // Add a handoff to each of the experts from every agent in the registry (experts + Intake)
+    foreach (AIAgent expert in agents.Experts)
+    {
+        handoffBuilder.WithHandoffs(agents.All.Except([expert]), expert);
+    }
+
+    // Let agents request more user information and return to the asking agent (rather than going back to the intake agent)
+    handoffBuilder.EnableReturnToPrevious();
+
+    return handoffBuilder.Build();
+}
+
+static async Task RunWorkflowAsync(Workflow workflow)
+{
+    using CancellationTokenSource cts = CreateConsoleCancelKeySource();
+    await using StreamingRun run = await InProcessExecution.OpenStreamingAsync(workflow, cancellationToken: cts.Token)
+                                                           .ConfigureAwait(false);
+
+    bool hadError = false;
+    do
+    {
+        Console.Write("> ");
+        string userInput = Console.ReadLine() ?? string.Empty;
+
+        if (userInput.Equals("exit", StringComparison.OrdinalIgnoreCase))
+        {
+            break;
+        }
+
+        await run.TrySendMessageAsync(userInput);
+        string? speakingAgent = null;
+        await foreach (WorkflowEvent evt in run.WatchStreamAsync(cts.Token))
+        {
+            switch (evt)
+            {
+                case AgentResponseUpdateEvent update:
+                {
+                    if (speakingAgent == null || speakingAgent != update.Update.AuthorName)
+                    {
+                        speakingAgent = update.Update.AuthorName;
+                        Console.Write($"\n{speakingAgent}: ");
+                    }
+
+                    Console.Write(update.Update.Text);
+                    break;
+                }
+
+                case WorkflowErrorEvent workflowError:
+                {
+                    Console.ForegroundColor = ConsoleColor.Red;
+
+                    if (workflowError.Exception != null)
+                    {
+                        Console.WriteLine($"\nWorkflow error: {workflowError.Exception}");
+                    }
+                    else
+                    {
+                        Console.WriteLine("\nUnknown workflow error occurred.");
+                    }
+
+                    Console.ResetColor();
+
+                    hadError = true;
+                    break;
+                }
+
+                case WorkflowWarningEvent workflowWarning when workflowWarning.Data is string message:
+                {
+                    Console.ForegroundColor = ConsoleColor.Yellow;
+                    Console.WriteLine(message);
+                    Console.ResetColor();
+                    break;
+                }
+            }
+        }
+    } while (!hadError);
+}
+
+static CancellationTokenSource CreateConsoleCancelKeySource()
+{
+    CancellationTokenSource cts = new();
+
+    // Normally, support a way to detach events, but in this case this is a termination signal, so cleanup will happen
+    // as part of application shutdown.
+    Console.CancelKeyPress += (s, args) =>
+    {
+        cts.Cancel();
+
+        // We handle cleanup + termination ourselves
+        args.Cancel = true;
+    };
+
+    return cts;
+}