ai-sdk-chat-transport.md

@trigger.dev/sdk	minor

Add AI SDK chat transport integration via two new subpath exports:

@trigger.dev/sdk/chat (frontend, browser-safe):

• TriggerChatTransport — custom ChatTransport for the AI SDK's useChat hook that runs chat completions as durable Trigger.dev tasks
• createChatTransport() — factory function

import { useChat } from "@ai-sdk/react";
import { TriggerChatTransport } from "@trigger.dev/sdk/chat";

const { messages, sendMessage } = useChat({
  transport: new TriggerChatTransport({
    task: "my-chat-task",
    accessToken,
  }),
});

@trigger.dev/sdk/ai (backend, extends existing ai.tool/ai.currentToolOptions):

• chatTask() — pre-typed task wrapper with auto-pipe support
• pipeChat() — pipe a StreamTextResult or stream to the frontend
• CHAT_STREAM_KEY — the default stream key constant
• ChatTaskPayload type

import { chatTask } from "@trigger.dev/sdk/ai";
import { streamText, convertToModelMessages } from "ai";

export const myChatTask = chatTask({
  id: "my-chat-task",
  run: async ({ messages }) => {
    return streamText({
      model: openai("gpt-4o"),
      messages: convertToModelMessages(messages),
    });
  },
});