Google ADK: An Open-Source Framework for Building Production-Ready AI Agents
Google's Agent Development Kit (ADK) is an open-source framework designed to bridge the gap between AI agent demos and reliable production systems. Built around four core concepts — Agent, Tool, Runner, and Session — ADK enables developers to construct, evaluate, and deploy AI agents using the same toolkit Google uses internally for products like Agentspace. The framework automatically converts plain Python functions with docstrings into callable tool schemas, reducing manual overhead and schema drift. ADK is model-agnostic, supports multi-agent orchestration, and includes a built-in developer UI that provides live traces of every tool call and model reasoning step. Unlike hand-rolled agent loops or frameworks such as LangGraph and CrewAI, ADK ships with integrated evaluation capabilities, allowing developers to define and run structured test suites against expected tool trajectories and responses.
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