Structured Output inside the agent supervisor model

[KeenanFernandes2000]

const formatterAgent = createReactAgent({
  llm,
  tools: [],
  messageModifier: new SystemMessage(
    "You are markdown formatter agent, using all the content provide from the blogger and image generator, there needs to be a main image of the blog ensure you place that before the first heading. Complie everything into a final output that can be displayed with headings and paragraphs and images in markdown styling. Respond with JSON object {{markdown:..., image:..., meta:...}}"
  ),
});

const formatterNode = async (
  state: typeof AgentState.State,
  config?: RunnableConfig
) => {
  formatterAgent;
  const result = await formatterAgent.invoke(state, config);
  const lastMessage = result.messages[result.messages.length - 1];

  return {
    messages: [
      new HumanMessage({ content: lastMessage.content, name: "formatter" }),
    ],
  };
};

const blogSchema = z.object({
  markdown: z.string().describe("The main content of the blog in markdown"),
  image: z.string().describe("The image url of the blog"),
  meta: z.object({
    description: z.string().describe("The meta description of the blog"),
    tags: z.array(z.string()).describe("Tags related to the blog"),
  }),
});

I have this as part of my supervisor workflow, however I want to use a structured output using Zod, like above. Is there a way to use strucuturedOutput with this flow because i keep getting errors no matter how I try to incorporate it.