Software development is undergoing significant changes, with AI playing a key role. Advancements in model intelligence for coding encourage us to rethink how development should be done. As a result, today's development tools are quite different from those of just a few years ago. Google Antigravity embraces this change by rethinking what a truly agent-optimized experience should look like. Agents need structured reasoning loops, tool-calling execution environments, state management, and robust orchestration. In this talk, we examine how Antigravity simplifies these workflows for Python developers. We'll start with a foundational walkthrough of agentic systems, then unpack how Antigravity enables developers to rapidly build, test, and deploy their own autonomous applications.