Add AG-UI Blazor sample

dotnet/samples/AGUIDojo/AGUIDojoClient/Components/Demos/HumanInTheLoop/HumanInTheLoopAgent.cs

@@ -0,0 +1,57 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.Runtime.CompilerServices;
+using Microsoft.Agents.AI;
+using Microsoft.Extensions.AI;
+
+namespace AGUIDojoClient.Components.Demos.HumanInTheLoop;
+
+/// <summary>
+/// A delegating agent that prepends instructions for the human-in-the-loop workflow.
+/// </summary>
+internal sealed class HumanInTheLoopAgent : DelegatingAIAgent
+{
+    private static readonly ChatMessage InstructionsMessage = new(
+        ChatRole.System,
+        """
+        You help users create and execute plans. Follow this workflow:
+
+        1. When asked to create a plan, use the `create_plan` tool with a list of step descriptions.
+        2. IMMEDIATELY after creating a plan, call `confirm_plan` with the plan object to ask for user approval.
+        3. Wait for the user to confirm which steps they want to proceed with.
+        4. Once confirmed, use `update_plan_step` to mark steps as 'completed' as you execute them.
+
+        IMPORTANT:
+        - Always call `confirm_plan` right after `create_plan` - don't skip this step!
+        - The plan parameter for `confirm_plan` should be the exact plan object returned from `create_plan`.
+        - Do NOT start executing steps until the user confirms.
+        - After receiving confirmation, update each selected step to 'completed' status.
+        """);
+
+    public HumanInTheLoopAgent(AIAgent innerAgent)
+        : base(innerAgent)
+    {
+    }
+
+    public override Task<AgentRunResponse> RunAsync(
+        IEnumerable<ChatMessage> messages,
+        AgentThread? thread = null,
+        AgentRunOptions? options = null,
+        CancellationToken cancellationToken = default)
+    {
+        // Prepend instructions message
+        var messagesWithInstructions = messages.Prepend(InstructionsMessage);
+        return base.RunAsync(messagesWithInstructions, thread, options, cancellationToken);
+    }
+
+    public override IAsyncEnumerable<AgentRunResponseUpdate> RunStreamingAsync(
+        IEnumerable<ChatMessage> messages,
+        AgentThread? thread = null,
+        AgentRunOptions? options = null,
+        CancellationToken cancellationToken = default)
+    {
+        // Prepend instructions message
+        var messagesWithInstructions = messages.Prepend(InstructionsMessage);
+        return base.RunStreamingAsync(messagesWithInstructions, thread, options, cancellationToken);
+    }
+}