概要
This skill provides a comprehensive framework for documenting actor-system interactions and functional requirements using Ivar Jacobson’s agile Use Case 2.0 methodology. It enables developers and analysts to build structured, scalable specifications including basic, alternative, and exception flows, business rules, and non-functional requirements. By integrating with documentation patterns and supporting diagram generation via PlantUML and Mermaid, it ensures that requirements remain traceable, testable, and ready for incremental implementation through defined use case slices.