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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.

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

• Code-First Development: Define agent logic, tools, and orchestrationdirectly in Python for ultimate flexibility, testability, and versioning.

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

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

For remote agent-to-agent communication, ADK integrates with theA2A protocol.See thisexamplefor how they can work together.

You can install the latest stable version of ADK usingpip:

pip install google-adk

The release cadence is weekly.

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

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.

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

• Documentation

fromgoogle.adk.agentsimportAgentfromgoogle.adk.toolsimportgoogle_searchroot_agent=Agent(name="search_assistant",model="gemini-2.0-flash",# Or your preferred Gemini modelinstruction="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 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.

fromgoogle.adk.agentsimportLlmAgent,BaseAgent# Define individual agentsgreeter=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_agentscoordinator=LlmAgent(name="Coordinator",model="gemini-2.0-flash",description="I coordinate greetings and tasks.",sub_agents=[# Assign sub_agents heregreeter,task_executor    ])

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

adkeval \    samples_for_testing/hello_world \    samples_for_testing/hello_world/hello_world_eval_set_001.evalset.json

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 readCode Contributing Guidelines to get started.

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

Happy Agent Building!