In the era of AI-native development, the speed of code generation often outpaces our ability to maintain architectural integrity. This session introduces Spec-Driven Development (SDD), a methodology where a formal, structured specification becomes the primary executable artifact and single source of truth. We will explore how to transition from informal prompting to a rigorous four-phase workflow—Specify, Plan, Tasks, and Implement—ensuring that AI agents act as precise collaborators rather than unpredictable black boxes. Attendees will learn to write machine-interpretable requirements that eliminate ambiguity, prevent "architectural drift," and scale AI initiatives with production-grade reliability.