GroupChatManager with Ollama not working - C#

[RMKeene]

So, after lengthy (all day) debugging and trial and error, I have code that still does not work.

I am trying to do an Agent in C# that has Mary and Joe telling each other jokes. I don't care what the actual conversation is.
So doing dual agent: I set it up with OllamaAgent (works fine for a simple query). Then make two ConversableAgent, Mary and Joe.
(I setup up some Transition for a Graph, but that was not working so unused code.)
Then make a RoundRobbinGroupChat, and a GroupChatManager and then kick it off with "Tell a joke Mary."
I then GenerateReplyAsync on the groupChatManager. And loop showing the result, and appending the history.

What I get is just the same joke repeated 3 times (my loop limit).

I suspect I am doing something basically wrong. Any help?

Here is the source.

`

using AutoGen;
using AutoGen.Core;
using AutoGen.Ollama;
using AutoGen.Ollama.Extension;
using AutoGen.SemanticKernel.Extension;
namespace AutoGenTest1;

internal class Program
{
    static async Task Main(string[] args)
    {
        await (new Program()).RunAgents(args);
    }

    async Task RunAgents(string[] args)
    {
        CancellationToken ct = new();

        ConsoleColor consoleColor = Console.ForegroundColor;
        Console.WriteLine("Hello, AutoGen");
        Console.ForegroundColor = ConsoleColor.Green;

        HttpClient httpClient = new()
        {
            BaseAddress = new Uri("http://localhost:11434"),
        };

        IAgent ollamaAgent = new OllamaAgent(
                httpClient: httpClient,
                name: "ollama",
                modelName: "llama3.2",
                systemMessage: "You are a helpful AI assistant")
            .RegisterMessageConnector()
            .RegisterPrintMessage();

        Dictionary<string, Func<string, Task<string>>> functionMap = new()
        {
            { "test", MyFunction }
        };

        IAgent joeAgent = new ConversableAgent(
            name: "Joe",
            systemMessage: "Your name is Joe and you are part of a comedy duo. Always prefix your answers with Joe| and postfix with 'What do you think Mary'",
            innerAgent: ollamaAgent,
            defaultAutoReply: "I'm sorry, I don't know how to help with that. (Joe)",
            humanInputMode: HumanInputMode.AUTO,
            isTermination: null,
            functionMap: functionMap
            ).RegisterPrintMessage();

        IAgent maryAgent = new ConversableAgent(
            name: "Mary",
            systemMessage: "Your name is Mary and you are part of a comedy duo. Always prefix your answers with Mary| and postfix with 'What do you think Joe'",
            innerAgent: ollamaAgent,
            defaultAutoReply: "I'm sorry, I don't know how to help with that. (Mary)",
            humanInputMode: HumanInputMode.AUTO,
            isTermination: null,
            functionMap: functionMap
            ).RegisterPrintMessage();

        List<Transition> transitions = [
                Transition.Create(from: joeAgent, to: maryAgent),
                Transition.Create(from: maryAgent, to: joeAgent)
            ];
        Graph graph = new(transitions);
        RoundRobinGroupChat groupChat = new(
            agents: [joeAgent, maryAgent]
            );
        GroupChatManager groupChatManager = new(groupChat);

        GenerateReplyOptions generateReplyOptions = new()
        {
            MaxToken = 100
        };

        List<AutoGen.Core.IMessage> chatHistory = [
            new AutoGen.Core.TextMessage(AutoGen.Core.Role.User, "Tell a joke Mary,", "Joe"),
            ];

        int maxLoops = 3;
        while (maxLoops > 0)
        {
            var result = await groupChatManager.GenerateReplyAsync(
                options: generateReplyOptions,
                messages: chatHistory,
                cancellationToken: ct);

            Console.WriteLine(".........................................");
            Console.WriteLine(result);
            Console.WriteLine("==============================================");
            chatHistory.Add(result);
            maxLoops--;
        }

        Console.ForegroundColor = consoleColor;
        Console.WriteLine("Done");
    }

    public async Task<string> MyFunction(string input)
    {
        // Your logic here
        await Task.Delay(100); // Simulate async work
        return $"Processed: {input}";
    }
}

`

And the output

`
Hello, AutoGen
from: ollama
Mary|I've got one! Why couldn't the bicycle stand up by itself? Because it was two-tired! What do you think Joe?

	TextMessage from ollama
	--------------------
	Mary|I've got one! Why couldn't the bicycle stand up by itself? Because it was two-tired! What do you think Joe?
	--------------------

	.........................................
	TextMessage(assistant, Mary|I've got one! Why couldn't the bicycle stand up by itself? Because it was two-tired! What do you think Joe?, ollama)
	==============================================
	.........................................
	TextMessage(assistant, Mary|I've got one! Why couldn't the bicycle stand up by itself? Because it was two-tired! What do you think Joe?, ollama)
	==============================================
	.........................................
	TextMessage(assistant, Mary|I've got one! Why couldn't the bicycle stand up by itself? Because it was two-tired! What do you think Joe?, ollama)
	==============================================
	Done

`