Help with migration OpenAi Assistant

[JP-droidic]

Hi team

We have been trying to migrate from SK 1.3x to the latest version, and we hit a wall :(

We use C # and the OpenAI assistant. In all your examples https://github.com/microsoft/semantic-kernel/tree/main/dotnet/samples/GettingStartedWithAgents/OpenAIAssistant, you show multiple conversations that happen sequentially, it would be amazing if someone could give a brief example of how to continue a conversation in the web world where

1. The user starts a conversation with the OpenAI assistant, we create a thread and store it, and then the user asks another question.
   public async IAsyncEnumerable<AgentResponseItem<StreamingChatMessageContent>> InvokeStreamingAsync( ICollection<ChatMessageContent> messages, AgentThread? thread = null, OpenAIAssistantAgentInvokeOptions? options = null, [EnumeratorCancellation] CancellationToken cancellationToken = default)

How to get AgentThread based on a saved ThreadId that is a string

AssistantClient - has a GetThreadAsync(threadId) - but this method returns AssistantThread - how to get AgentThread?

[rogeriorfp]

Refer to this documentation page for guidance: OpenAIAssistantAgent C# Migration Guide

[moonbox3]

Adding @westey-m who may be able to help as well for the .NET side (if there are further questions after referring to the migration guide).

[JP-droidic]

Thank you so much @rogeriorfp - I wasn't able to find the upgrade.

@westey-m, it would be great if the examples had a more web-like approach where a user sends a request and we create an agent, thread (as it is in your examples), but then the user sends a follow-up question with, e.g., an attached file.

So this is not happening in the same function as in your code, one after another - as the user can ask this question 5 days later, we need to recreate the whole process again. Of course, it is our implementation how the user, threadId is saved - what I'm looking for is:

• based on existing thread id, add additional message (fetch thread, update vector database or attach a new vector database)...
• This is also an example of recreating the entire previous conversation in a new thread. In our UC, we allow users to move existing conversations from one model to another. Before we used

Assistant.AddChatMessageAsync(assistantHelper.ThreadId,
                        new ChatMessageContent(authorRole, el.Content));

How to handle this now?

[westey-m]

Hey @JP-droidic, when using an OpenAIAssistantAgent, it works with an OpenAIAssistantAgentThread and it inherits from AgentThread. The idea here is that users can use the Agent abstraction without needing to worry about the differences in threading between different agents.

OpenAIAssistantAgentThread has an Id property that contain the id of the underlying OpenAI assistant agent thread. You can also construct a new OpenAIAssistantThread using an existing Id if you want to continue an existing conversation, using this constructor:
public OpenAIAssistantAgentThread(AssistantClient client, string id)

If you want to have custom logic outside of the abstraction that manipulates threads like you mention above, you can of course still continue to do so. Just use the id from the OpenAIAssistantAgentThread yourself.

[JP-droidic]

thank you