Google ADK

Google Agent Development Kit (ADK) is a code-first OSS framework for agents and workflows with sessions, tools, evaluation, local debugging, deployment adapters, streaming, and multi-agent delegation. It is Google’s open developer surface for agent construction (distinct from Google Cloud product marketing). Track ADK as a framework option and pattern source even when Google SaaS surfaces stay out of the company harvest. Evaluate tool/session model against MCP-centric OS designs before adopting as the default worker SDK. Google Agent Development Kit (ADK) is a code-first agent framework with agent and workflow primitives, sessions, tools, evaluation, local debugging, deployment adapters, streaming, and multi-agent delegation. An open-source, code-first Python toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control..