Structured Output

import {
  extractJsonMiddleware,
  Output,
  streamText,
  wrapLanguageModel,
} from "ai";
import { tensormesh } from "@tensormesh/ai-sdk-provider";
import { z } from "zod";

const launchPlanSchema = z.object({
  title: z.string(),
  audience: z.string(),
  summary: z.string(),
  integrationSteps: z.array(
    z.object({
      step: z.string(),
      detail: z.string(),
    }),
  ),
  successSignals: z.array(z.string()),
});

const result = streamText({
  model: wrapLanguageModel({
    model: tensormesh("deepseek-ai/DeepSeek-V4-Flash"),
    middleware: extractJsonMiddleware(),
  }),
  prompt:
    "Create a launch plan for a TypeScript team adopting Tensormesh serverless inference. Return only the JSON object.",
  output: Output.object({
    schema: launchPlanSchema,
  }),
});

for await (const partialObject of result.partialOutputStream) {
  console.log(partialObject);
}