Agentic AI with Google ADK: A Developer's Journey to a Travel Planner

This series of articles embarks on an in-depth exploration of building agentic Artificial Intelligence (AI) systems utilizing Google's Agent Development Kit (ADK). The ADK is a robust, open-source framework engineered to streamline the development, evaluation, and deployment of sophisticated AI agents, promoting a code-first approach that aligns agent development with traditional software engineering practices. While optimized for the Google Cloud ecosystem, particularly Gemini models and Vertex AI, ADK's design emphasizes model and deployment agnosticism, fostering compatibility with a diverse range of tools and frameworks.

Throughout this series, we will incrementally construct a "Travel Planner" agent. Starting from a rudimentary greeting agent, we will progressively enhance its capabilities by integrating various ADK components and design patterns. Each installment will provide comprehensive technical explanations and complete, evolving Python source code, allowing readers to follow along and build their own agent. The objective is to furnish developers with the knowledge and practical skills to leverage ADK for creating complex, production-ready agentic applications.

We will reference official Google ADK documentation (adk-docs), sample repositories (adk-samples), and the Python library itself (adk-python) to provide authoritative context and further reading.