How to Retrieve the Result from the Last Step and return that Process framework?

[mickbut-ler]

I'm using the SK Process framework to create a workflow where multiple steps are executed sequentially. I need to retrieve the output of the last step after the process completes and return that.

In my workflow, the final step is generateInstructionsStep, which calls GenerateInstructionsStep.Functions.GetInstructions. I want to return the result of this function after execution. How is this possible?

public class RecipeProcessing
{
    private readonly Kernel _kernel;

    public RecipeProcessing(Kernel kernel)
    {
        _kernel = kernel;
    }

    public async Task<string> ExecuteAsync(string foodContext)
    {
        Console.WriteLine("Starting recipe processing...");

        ProcessBuilder processBuilder = new("RecipeWorkflow");

        var isFoodRelatedContent = processBuilder.AddStepFromType<RecipeValidationStep>();
        var generateInstructionsStep = processBuilder.AddStepFromType<GenerateInstructionsStep>();

        processBuilder.OnInputEvent(RecipeProcessingEvents.StartProcess)
            .SendEventTo(new ProcessFunctionTargetBuilder(isFoodRelatedContent, functionName: RecipeValidationStep.Functions.IsFoodRelatedContent, parameterName: "foodContext"));

        isFoodRelatedContent
            .OnEvent(RecipeProcessingEvents.GetInstructions)
            .SendEventTo(new ProcessFunctionTargetBuilder(generateInstructionsStep, functionName: GenerateInstructionsStep.Functions.GetInstructions, parameterName: "foodContext"));

        KernelProcess process = processBuilder.Build();

        using LocalKernelProcessContext localProcess = await process.StartAsync(_kernel, new KernelProcessEvent
        {
            Id = RecipeProcessingEvents.StartProcess,
            Data = new { foodContext }
        });

        var externalMessageChannel = await localProcess.GetExternalMessageChannelAsync();
        var processState = await localProcess.GetStateAsync();
        Console.WriteLine($"Process State: {processState}");

        return "RETURN OUTCOME HERE";
    }
}

[moonbox3]

Hi @mickbut-ler, this isn't easily discoverable, but in a test (we'll get this added to our docs) we show how to get the final state from a particular step here.

[moonbox3]

Didn't realize an issue was created out of this - please view #10919 for further updates.