Agent Development Kit (ADK) for Kotlin

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.

• 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 Kotlin for ultimate flexibility, testability, and versioning.

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

If you're using Maven, add the following to your dependencies:

<dependency>
  <groupId>com.google.adk</groupId>
  <artifactId>google-adk-kotlin-core-jvm</artifactId>
  <version>0.7.0</version>
</dependency>

If you're using Gradle:

implementation("com.google.adk:google-adk-kotlin-core:0.7.0")

Every module is published under the com.google.adk group and shares the version shown above.

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

• Documentation
• Samples

import com.google.adk.kt.agents.LlmAgent
import com.google.adk.kt.agents.Instruction
import com.google.adk.kt.models.Gemini
import com.google.adk.kt.tools.GoogleSearchTool

val rootAgent = LlmAgent(
    name = "search_assistant",
    description = "An assistant that can search the web.",
    model = Gemini(name = "gemini-3.1-flash-lite-preview"),
    instruction = Instruction("You are a helpful assistant. Answer user questions using Google Search when needed."),
    tools = listOf(GoogleSearchTool())
)

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

The snippet above is the short version. Every runnable example lives under the examples directory of this repository.

• examples/ — JVM examples.

• examples/android/ — a Compose app showing the Android side.

We welcome contributions from the community! Whether it's bug reports, feature requests, documentation improvements, or code contributions, please see our CONTRIBUTING.md to get started.

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

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!