Agent Development Kit (ADK) for TypeScript

Caution

API Stability: Mostly stable, but expect potential breaking changes before 1.0. Production Use: Not recommended yet. Use at your own risk. Collaboration: General contributions are closed (issues/PRs). We are, however, accepting organized teams that can follow our coding standards and planning. Please contact us if you are interested.

An open-source, code-first TypeScript toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

Important Links: Docs, Samples. ADK JS Community Repo.

More ADK References: Python ADK, Java ADK, ADK Web, Other Language Samples.

Agent Development Kit (ADK) is designed for developers seeking fine-grained control and flexibility when building advanced AI agents that are tightly integrated with services in Google Cloud. It allows you to define agent behavior, orchestration, and tool use directly in code, enabling robust debugging, versioning, and deployment anywhere – from your laptop to the cloud.

---

✨ Key Features

Rich Tool Ecosystem: Utilize pre-built tools, custom functions, OpenAPI specs, or integrate existing tools to give agents diverse capabilities, all for tight integration with the Google ecosystem.

Code-First Development: Define agent logic, tools, and orchestration directly in TypeScript for ultimate flexibility, testability, and versioning.

Modular Multi-Agent Systems: Design scalable applications by composing multiple specialized agents into flexible hierarchies.

🚀 Installation

If you’re using npm, add the following to your dependencies:

npm install @google/adk

Or with yarn:

yarn add @google/adk

Note: This package requires zod version ^3.22.4 as a peer dependency. Please ensure it is installed in your project:

npm install zod

The current version is 0.1.0.

📚 Documentation

For building, evaluating, and deploying agents by follow the TypeScript documentation & samples:

• Documentation
• Samples

🏁 Feature Highlight

Same Features & Familiar Interface As Other ADKs:

import { LlmAgent, GOOGLE_SEARCH } from '@google/adk';

const rootAgent = new LlmAgent({
name: 'search_assistant',
description: 'An assistant that can search the web.',
model: 'gemini-2.5-flash', // Or your preferred models
instruction: 'You are a helpful assistant. Answer user questions using Google Search when needed.',
tools: [GOOGLE_SEARCH],
});

Development UI

Same as the Python Development UI. A built-in development UI to help you test, evaluate, debug, and showcase your agent(s).

Evaluate Agents

Coming soon...

🤖 A2A and ADK integration

For remote agent-to-agent communication, ADK integrates with the A2A protocol. Examples coming soon...

🏗️ Building the Project

This project uses esbuild to compile and bundle the TypeScript source code. You can build the project using the following npm scripts:

• npm run build: Compiles the TypeScript code into CommonJS, ESM, and Web formats in the dist directory.
• npm run build:bundle: Creates bundled versions of the output for easier distribution or use in environments that don’t support tree-shaking well.
• npm run build:watch: Watches for changes in the source files and automatically rebuilds the project for ESM format only.

🤝 Contributing

This project is in early development and is not quite ready for community contributions. But in the future, we will welcome bug reports, feature requests, documentation improvements, and code contributions. Please see our Contributing Guidelines for details on how this process will work.

📄 License

This project is licensed under the Apache 2.0 License - see the LICENSE file for details.

Preview

This feature is subject to the “Pre-GA Offerings Terms” in the General Service Terms section of the Service Specific Terms. Pre-GA features are available “as is” and might have limited support. For more information, see the launch stage descriptions.

---

Happy Agent Building!