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.Net: Change ChatCompletionAgent to notify intermediate messages as soon as they are available. #12575

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merged 1 commit into from
Jun 25, 2025
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.Net: Change ChatCompletionAgent to notify intermediate messages as soon as they are available. #12575

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19 changes: 10 additions & 9 deletions dotnet/src/Agents/Core/ChatCompletionAgent.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -391,6 +391,7 @@ private async IAsyncEnumerable<StreamingChatMessageContent> InternalInvokeStream

this.Logger.LogAgentChatServiceInvokedStreamingAgent(nameof(InvokeAsync), this.Id, agentName, serviceType);

int messageIndex = messageCount;
AuthorRole? role = null;
StringBuilder builder = new();
await foreach (StreamingChatMessageContent message in messages.ConfigureAwait(false))
Expand All @@ -401,18 +402,18 @@ private async IAsyncEnumerable<StreamingChatMessageContent> InternalInvokeStream

builder.Append(message.ToString());

yield return message;
}
// Capture mutated messages related function calling / tools
for (; messageIndex < chat.Count; messageIndex++)
{
ChatMessageContent chatMessage = chat[messageIndex];

// Capture mutated messages related function calling / tools
for (int messageIndex = messageCount; messageIndex < chat.Count; messageIndex++)
{
ChatMessageContent message = chat[messageIndex];
chatMessage.AuthorName = this.Name;

message.AuthorName = this.Name;
await onNewMessage(chatMessage).ConfigureAwait(false);
history.Add(chatMessage);
}

await onNewMessage(message).ConfigureAwait(false);
history.Add(message);
yield return message;
}

// Do not duplicate terminated function result to history
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