How to download files generated by the code interpreter tool with Semantic Kernel?

Hello !

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With Semantic Kernel you get every file that the code interpreter produces as a file-reference item in the assistant reply. All you have to do is :

• Collect the file-ids (they arrive as StreamingFileReferenceContent while you stream, or FileReferenceContent when you ask for the full message).
• Use the underlying OpenAIFileClient (or the file_client you created) to download the bytes.

using Azure.AI.OpenAI;

using Microsoft.SemanticKernel.Agents.OpenAI;

using Microsoft.SemanticKernel.Contents;   

using Microsoft.SemanticKernel;

using OpenAI.Files;

using System.Linq;

OpenAIFileClient fileClient = client.GetOpenAIFileClient();

List<string> fileIds = new();

await foreach (StreamingChatMessageContent chunk

               in agent.InvokeStreamingAsync(userMessage, thread))

{

    Console.Write(chunk.Content);                     

    fileIds.AddRange(chunk.Items

                     .OfType<StreamingFileReferenceContent>() 

                     .Select(f => f.FileId));

}

foreach (string id in fileIds)

{

    OpenAIFile info = fileClient.GetFile(id);                       

    BinaryData data = await fileClient.DownloadFileAsync(id);      

    string localName = Path.Combine("downloads",

                        Path.GetFileName(info.Filename ?? $"{id}.bin"));

    await File.WriteAllBytesAsync(localName, data.ToArray());

    Console.WriteLine($"saved → {localName}");

}

Another alternative you can have (non-streaming) :

ChatMessageContent reply = await agent.InvokeAsync(userMessage, thread);

foreach (var file in reply.Items.OfType<FileReferenceContent>())

{

    var bytes = await fileClient.DownloadFileAsync(file.FileId);

    File.WriteAllBytes($"out/{file.FileId}.png", bytes.ToArray());

}