概要
This skill provides comprehensive guidance for modeling entity lifecycles and system workflows using Harel statechart semantics. It enables developers to generate clear visual diagrams in PlantUML or Mermaid syntax and provides production-ready implementation patterns across languages like C# and TypeScript. Whether you are managing order processing, UI navigation, or complex backend workflows, this skill ensures your state transitions are logically sound, documented, and maintainable following industry best practices.