Add an AgentRunResponse ctor accepting a ChatResponse (#204)

* Add an AgentRunResponse ctor accepting a ChatResponse

* Update dotnet/src/Microsoft.Extensions.AI.Agents.Abstractions/AgentRunResponseUpdate.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: stephentoub

dotnet/src/Microsoft.Extensions.AI.Agents.Abstractions/AgentRunResponse.cs

@@ -44,6 +44,21 @@ public AgentRunResponse(ChatMessage message)
         this.Messages.Add(message);
     }
 
+    /// <summary>Initializes a new instance of the <see cref="AgentRunResponse"/> class.</summary>
+    /// <param name="response">The <see cref="ChatResponse"/> from which to seed this <see cref="AgentRunResponse"/>.</param>
+    /// <exception cref="ArgumentNullException"><paramref name="response"/> is <see langword="null"/>.</exception>
+    public AgentRunResponse(ChatResponse response)
+    {
+        _ = Throw.IfNull(response);
+
+        this.AdditionalProperties = response.AdditionalProperties;
+        this.CreatedAt = response.CreatedAt;
+        this.Messages = response.Messages;
+        this.RawRepresentation = response.RawRepresentation;
+        this.ResponseId = response.ResponseId;
+        this.Usage = response.Usage;
+    }
+
     /// <summary>Initializes a new instance of the <see cref="AgentRunResponse"/> class.</summary>
     /// <param name="messages">The response messages.</param>
     public AgentRunResponse(IList<ChatMessage>? messages)

dotnet/src/Microsoft.Extensions.AI.Agents.Abstractions/AgentRunResponseUpdate.cs

@@ -5,6 +5,7 @@
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
+using Microsoft.Shared.Diagnostics;
 
 namespace Microsoft.Extensions.AI.Agents;
 
@@ -58,6 +59,22 @@ public AgentRunResponseUpdate(ChatRole? role, IList<AIContent>? contents)
         this._contents = contents;
     }
 
+    /// <summary>Initializes a new instance of the <see cref="AgentRunResponseUpdate"/> class.</summary>
+    /// <param name="chatResponseUpdate">The <see cref="ChatResponseUpdate"/> from which to seed this <see cref="AgentRunResponseUpdate"/>.</param>
+    public AgentRunResponseUpdate(ChatResponseUpdate chatResponseUpdate)
+    {
+        _ = Throw.IfNull(chatResponseUpdate);
+
+        this.AdditionalProperties = chatResponseUpdate.AdditionalProperties;
+        this.AuthorName = chatResponseUpdate.AuthorName;
+        this.Contents = chatResponseUpdate.Contents;
+        this.CreatedAt = chatResponseUpdate.CreatedAt;
+        this.MessageId = chatResponseUpdate.MessageId;
+        this.RawRepresentation = chatResponseUpdate.RawRepresentation;
+        this.ResponseId = chatResponseUpdate.ResponseId;
+        this.Role = chatResponseUpdate.Role;
+    }
+
     /// <summary>Gets or sets the name of the author of the response update.</summary>
     public string? AuthorName
     {

dotnet/src/Microsoft.Extensions.AI.Agents/ChatCompletion/ChatClientAgent.cs

@@ -130,7 +130,7 @@ public override async Task<AgentRunResponse> RunAsync(
 
         await this.NotifyThreadOfNewMessagesAsync(chatClientThread, chatResponseMessages, cancellationToken).ConfigureAwait(false);
 
-        return chatResponse.ToAgentRunResponse(this.Id);
+        return new(chatResponse) { AgentId = this.Id };
     }
 
     /// <inheritdoc/>
@@ -167,7 +167,7 @@ public override async IAsyncEnumerable<AgentRunResponseUpdate> RunStreamingAsync
             {
                 responseUpdates.Add(update);
                 update.AuthorName ??= this.Name;
-                yield return update.ToAgentRunResponseUpdate(this.Id);
+                yield return new(update) { AgentId = this.Id };
             }
 
             hasUpdates = await responseUpdatesEnumerator.MoveNextAsync().ConfigureAwait(false);

dotnet/src/Microsoft.Extensions.AI.Agents/ChatCompletion/ChatResponseExtensions.cs

@@ -43,6 +43,28 @@ public void ConstructorWithMessagesRoundtrips()
         Assert.Same(messages, response.Messages);
     }
 
+    [Fact]
+    public void ConstructorWithChatResponseRoundtrips()
+    {
+        ChatResponse chatResponse = new()
+        {
+            AdditionalProperties = new(),
+            CreatedAt = new DateTimeOffset(2022, 1, 1, 0, 0, 0, TimeSpan.Zero),
+            Messages = [new(ChatRole.Assistant, "This is a test message.")],
+            RawRepresentation = new object(),
+            ResponseId = "responseId",
+            Usage = new UsageDetails(),
+        };
+
+        AgentRunResponse response = new(chatResponse);
+        Assert.Same(chatResponse.AdditionalProperties, response.AdditionalProperties);
+        Assert.Equal(chatResponse.CreatedAt, response.CreatedAt);
+        Assert.Same(chatResponse.Messages, response.Messages);
+        Assert.Equal(chatResponse.ResponseId, response.ResponseId);
+        Assert.Same(chatResponse.RawRepresentation, response.RawRepresentation);
+        Assert.Same(chatResponse.Usage, response.Usage);
+    }
+
     [Fact]
     public void PropertiesRoundtrip()
     {

dotnet/tests/Microsoft.Extensions.AI.Agents.Abstractions.UnitTests/AgentRunResponseTests.cs

@@ -24,6 +24,35 @@ public void ConstructorPropsDefaulted()
         Assert.Equal(string.Empty, update.ToString());
     }
 
+    [Fact]
+    public void ConstructorWithChatResponseUpdateRoundtrips()
+    {
+        ChatResponseUpdate chatResponseUpdate = new()
+        {
+            AdditionalProperties = new(),
+            AuthorName = "author",
+            Contents = [new TextContent("hello")],
+            ConversationId = "conversationId",
+            CreatedAt = new DateTimeOffset(2022, 1, 1, 0, 0, 0, TimeSpan.Zero),
+            FinishReason = ChatFinishReason.Length,
+            MessageId = "messageId",
+            ModelId = "modelId",
+            RawRepresentation = new object(),
+            ResponseId = "responseId",
+            Role = ChatRole.Assistant,
+        };
+
+        AgentRunResponseUpdate response = new(chatResponseUpdate);
+        Assert.Same(chatResponseUpdate.AdditionalProperties, response.AdditionalProperties);
+        Assert.Equal(chatResponseUpdate.AuthorName, response.AuthorName);
+        Assert.Same(chatResponseUpdate.Contents, response.Contents);
+        Assert.Equal(chatResponseUpdate.CreatedAt, response.CreatedAt);
+        Assert.Equal(chatResponseUpdate.MessageId, response.MessageId);
+        Assert.Same(chatResponseUpdate.RawRepresentation, response.RawRepresentation);
+        Assert.Equal(chatResponseUpdate.ResponseId, response.ResponseId);
+        Assert.Equal(chatResponseUpdate.Role, response.Role);
+    }
+
     [Fact]
     public void PropertiesRoundtrip()
     {