@onkernel/ai-sdk

Vercel AI SDK-compatible tools for the Kernel SDK. This package exposes a Playwright execution tool wired to an existing Kernel browser session, so LLMs can browse and act via structured tools.

Install

npm install @onkernel/ai-sdk zod
# Ensure your app depends on the Vercel AI SDK and @onkernel/sdk
npm install ai @onkernel/sdk

Note: @onkernel/sdk is a peer dependency; install it in your application.

Usage

import { playwrightExecuteTool } from "@onkernel/ai-sdk";
import Kernel from "@onkernel/sdk";
import { generateText } from "ai";

// 1) Create Kernel client and start a browser session
const client = new Kernel({
  apiKey: process.env["KERNEL_API_KEY"], // optional, default env lookup
});
const browser = await client.browsers.create({ browser: "chromium" });
const sessionId = browser.session_id;
console.log(sessionId);

// 2) Create the Playwright execution tool
const playwrightTool = playwrightExecuteTool({ client, sessionId });

// 3) Use with Vercel AI SDK
const model = ...; // your AI model instance

const result = await generateText({
  model,
  prompt: "Open example.com and click the first link",
  tools: {
    playwright_execute: playwrightTool,
  },
});

Tool shape

playwrightExecuteTool returns a single Vercel AI SDK tool instance. The tool's input mirrors PlaywrightExecuteParams from the Kernel SDK:

{
  code: string;        // required JavaScript/TypeScript snippet
  timeout_sec?: number; // optional execution timeout in seconds (default 60)
}

Under the hood we call client.browsers.playwright.execute(sessionId, { code, timeout_sec }), so any code you can run through the SDK can be run via the tool.

API

function playwrightExecuteTool(options: {
  client: Kernel; // Kernel SDK client instance (@onkernel/sdk)
  sessionId: string; // Existing browser session id
}): ReturnType<typeof tool>;

Examples

Run the sample script in examples/basic.ts after exporting both KERNEL_API_KEY and a model provider key (the example uses OpenAI):

export KERNEL_API_KEY=...
export OPENAI_API_KEY=...
pnpm exec tsx examples/basic.ts

The script mirrors the usage above: it starts a browser session, registers the playwright_execute tool, calls generateText from the Vercel AI SDK (forcing the model to invoke the tool), logs the model response/tool results, and then cleans up the browser session.

License

MIT © Kernel