Streaming tool sub-steps when using NextJS, and useChat

[apantall-runway]

Does anyone know if this is possible? I am basically wanting to stream sub-steps back to the ui while I am executing a tool call. For example:

const result = await streamText({
    model: anthropic("claude-3-5-sonnet-20241022"),
    messages: convertToCoreMessages(messages),
    system: systemPrompt,
    experimental_toolCallStreaming: true,
    tools: {
      create_artifact: tool({
        description:
          "Create or update a real-time collaborative artifact.",
        parameters: z.object({
         // tool specs
        }),
        execute: async ({ title, content, id }) => {
          try {
            const tiptapid = user_id + "-" + threadId + "-" + id;
             //stream update to UI
            **data.append({ type: 'progress', tool: 'create_artifact', status: 'Starting document creation', progress: 0 })**
            
            const status = await purgeDocument(tiptapid)
            //stream update to UI
            **data.append({ type: 'progress', tool: 'create_artifact', status: 'Document purged', progress: 20 })**

I have a handful of multi-step tools, including tools that call other LLMs to process results. It would be great to be able to emit updates as part of the streaming tool call or as a separate stream.