Agent Development Kit (ADK)

The Agent Development Kit (ADK) is Google's open-source, code-first framework, designed for building, evaluating, and deploying sophisticated, modular multi-agent AI systems.

ADK provides a flexible, code-first approach to AI agent development, applying software engineering principles to complex agentic architectures. The framework is model-agnostic, but optimized for Gemini and the Google ecosystem (Vertex AI Agent Engine, Cloud Run). Developers use ADK to define agent logic, tools, and orchestration, supporting multiple languages: Python, Go, TypeScript, and Java. It simplifies the creation of multi-agent systems by providing distinct agent categories: LLM Agents (reasoning), Workflow Agents (orchestration), and Custom Agents (specialized logic).

https://google.github.io/adk-docs/