Agent Development Kit (ADK)

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

Important Links: Docs | Samples | Java ADK | ADK Web

Agent Development Kit (ADK) is a flexible and modular framework for developing and deploying AI agents. While optimized for Gemini and the Google ecosystem, ADK is model-agnostic, deployment-agnostic, and is built for compatibility with other frameworks. ADK was designed to make agent development feel more like software development, to make it easier for developers to create, deploy, and orchestrate agentic architectures that range from simple tasks to complex workflows.

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✨ 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 Python for ultimate flexibility, testability, and versioning.

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

• Deploy Anywhere: Easily containerize and deploy agents on Cloud Run or scale seamlessly with Vertex AI Agent Engine.

🤖 Agent2Agent (A2A) Protocol and ADK Integration

For remote agent-to-agent communication, ADK integrates with the A2A protocol. See this example for how they can work together.

🚀 Quick Start

Para Usuários Brasileiros / Portuguese Users

Este repositório foi reorganizado com tutoriais em português! 🇧🇷

Instalação Rápida:

# Clone o repositório
git clone https://github.com/google/adk-python.git
cd adk-python

# Execute o script de configuração
./scripts/setup.sh

# Configure o ambiente
source .env.local

# Execute uma demonstração
make demo

Installation

Stable Release (Recommended)

You can install the latest stable version of ADK using pip:

pip install google-adk

Development Setup

For development and tutorials:

# Quick setup
make install-dev

# Or manual setup
pip install -e .
pip install -r config/requirements-tutorial.txtonfig/requirements-tutorial.txt

The release cadence is weekly.

This version is recommended for most users as it represents the most recent official release.

Development Version

Bug fixes and new features are merged into the main branch on GitHub first. If you need access to changes that haven't been included in an official PyPI release yet, you can install directly from the main branch:

pip install git+https://github.com/google/adk-python.git@main

Note: The development version is built directly from the latest code commits. While it includes the newest fixes and features, it may also contain experimental changes or bugs not present in the stable release. Use it primarily for testing upcoming changes or accessing critical fixes before they are officially released.

📚 Documentation

Explore the full documentation for detailed guides on building, evaluating, and deploying agents:

• Documentation

🏁 Feature Highlight

Define a single agent

from google.adk.agents import Agent
from google.adk.tools import google_search

root_agent = Agent(
    name="search_assistant",
    model="gemini-2.0-flash", # Or your preferred Gemini model
    instruction="You are a helpful assistant. Answer user questions using Google Search when needed.",
    description="An assistant that can search the web.",
    tools=[google_search]
)

Define a multi-agent system

Define a multi-agent system with coordinator agent, greeter agent, and task execution agent. Then ADK engine and the model will guide the agents works together to accomplish the task.

from google.adk.agents import LlmAgent, BaseAgent

# Define individual agents
greeter = LlmAgent(name="greeter", model="gemini-2.0-flash", ...)
task_executor = LlmAgent(name="task_executor", model="gemini-2.0-flash", ...)

# Create parent agent and assign children via sub_agents
coordinator = LlmAgent(
    name="Coordinator",
    model="gemini-2.0-flash",
    description="I coordinate greetings and tasks.",
    sub_agents=[ # Assign sub_agents here
        greeter,
        task_executor
    ]
)

Development UI

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

Evaluate Agents

adk eval \
    samples_for_testing/hello_world \
    samples_for_testing/hello_world/hello_world_eval_set_001.evalset.json

🤝 Contributing

We welcome contributions from the community! Whether it's bug reports, feature requests, documentation improvements, or code contributions, please see our

• General contribution guideline and flow.
• Then if you want to contribute code, please read Code Contributing Guidelines to get started.

📁 Repository Structure

This repository has been reorganized for better development experience:

adk-python/
├── 📁 src/google/adk/        # Core ADK source code
├── 📁 tutorials/             # Brazilian Portuguese tutorials
│   ├── demos/                # Practical demonstrations
│   ├── notebooks/            # Jupyter notebooks
│   └── docs/                 # Documentation in Portuguese
├── 📁 tests/                 # Automated tests
├── 📁 examples/              # Official examples
├── 📁 scripts/               # Development utilities
├── 📁 config/                # Configuration files
└── 📁 .vscode/               # VS Code settings

Quick Commands:

• make help - Show all available commands
• make demo - Run practical demonstration
• make test - Run all tests
• make format - Format code
• make notebook - Open Jupyter notebooks

See ESTRUTURA.md for detailed organization info.

🇧🇷 Tutoriais em Português

• Demonstração Prática - Como usar o ADK na prática
• Guia Completo - Guia completo de uso
• Notebook Tutorial - Tutorial interativo
• Interface Web - Demonstração com interface web

📄 License

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

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Happy Agent Building! 🤖