Mastra、AI SDK v7 のサポートを継続し開発者体験を改善

npm install @mastra/core

import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

export const imageAgent = new Agent({
  // ...
  model: openai("gpt-5.6-sol"),
  tools: {
    imageGeneration: openai.tools.imageGeneration({
      size: "1536x1024",
      quality: "high"
    })
  }
});

import { writeFileSync } from "fs";
import { imageAgent } from "./mastra/agents/image-agent";

const result = await imageAgent.stream("A cyberpunk neon green space squirrel");

for await (const chunk of result.fullStream) {
  if (chunk.type === "tool-result" && chunk.payload.toolName === "imageGeneration") {
    const base64 = chunk.payload.result.result;
    writeFileSync("a-cyberpunk-neon-green-space-squirrel.png", Buffer.from(base64, "base64"));
  }
}

import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

export const assistantAgent = new Agent({
  // ...
  model: openai("gpt-5.6-sol")
});

const result = await assistantAgent.stream("Plan a 14-day trip to Tokyo in November with a mix of culture and food.", {
  modelSettings: { reasoning: "high" }
});

import type { UIMessage, ModelMessage } from "ai";

const uiMessages: UIMessage[] = [{ id: "1", role: "user", parts: [{ type: "text", text: "Hello!" }] }];
const stream = await assistantAgent.stream({ messages: uiMessages });

const modelMessages: ModelMessage[] = [{ role: "user", content: "Hello!" }];
const result = await assistantAgent.generate({ messages: modelMessages });

const result = await assistantAgent.generate({
  messages: [
    {
      role: "user",
      content: [
        { type: "text", text: "What's in this image?" },
        { type: "file", data: imageBase64, mediaType: "image/png" }
      ]
    }
  ]
});

import { createTool } from "@mastra/core/tools";

export const screenshotTool = createTool({
  id: "screenshot",
  description: "Take a screenshot of the current page.",
  execute: async () => ({
    content: [{ type: "image", data: buffer.toString("base64"), mimeType: "image/png" }]
  })
});

npm install @mastra/ai-sdk

import { Mastra } from "@mastra/core";
import { chatRoute } from "@mastra/ai-sdk";

export const mastra = new Mastra({
  // ...
  server: {
    apiRoutes: [
      chatRoute({
        path: "/chat",
        agent: "assistant-agent",
        version: "v7"
      })
    ]
  }
});

import { Mastra } from "@mastra/core";
import { workflowRoute } from "@mastra/ai-sdk";

export const mastra = new Mastra({
  // ...
  server: {
    apiRoutes: [
      workflowRoute({
        path: "/workflow",
        workflow: "my-workflow",
        version: "v7"
      })
    ]
  }
});

import { handleChatStream } from "@mastra/ai-sdk";
import { createUIMessageStreamResponse } from "ai";
import { mastra } from "@/src/mastra";

export async function POST(req: Request) {
  const params = await req.json();
  const stream = await handleChatStream({
    mastra,
    agentId: "assistant-agent",
    params,
    version: "v7"
  });
  return createUIMessageStreamResponse({ stream });
}

import { handleNetworkStream } from "@mastra/ai-sdk";
import { createUIMessageStreamResponse } from "ai";
import { mastra } from "@/src/mastra";

export async function POST(req: Request) {
  const params = await req.json();
  const stream = await handleNetworkStream({
    mastra,
    agentId: "assistant-agent",
    params,
    version: "v7"
  });
  return createUIMessageStreamResponse({ stream });
}

import { handleWorkflowStream } from "@mastra/ai-sdk";
import { createUIMessageStreamResponse } from "ai";
import { mastra } from "@/src/mastra";

export async function POST(req: Request) {
  const params = await req.json();
  const stream = await handleWorkflowStream({
    mastra,
    workflowId: "assistant-workflow",
    params,
    version: "v7"
  });
  return createUIMessageStreamResponse({ stream });
}

import { toAISdkStream } from "@mastra/ai-sdk";

const stream = toAISdkStream(mastraAgentStream, { version: "v7" });

import { toAISdkMessages } from "@mastra/ai-sdk";

const uiMessages = toAISdkMessages(mastraMessages, { version: "v7" });