ZhongliangGuo

OOP architecture planning and progress tracking for software projects. Generates Mermaid UML (class, sequence, component, state, and ER diagrams) inside CLAUDE.md with full typed signatures, visibility markers, implementation status on every class/method/relationship, and special notes for constraints. CLAUDE.md becomes a self-maintaining architecture blueprint. Use this skill whenever: the user starts a new project needing architecture planning; says "plan", "architect", "design the classes", "OOP", "UML", or "class diagram"; is building a multi-file project; asks to resume a project; wants to sync/refresh architecture after changes; triggers manually (e.g. /oop-architect); says "update CLAUDE.md", "update UML", or "sync architecture". Even if OOP isn't mentioned explicitly — if the project benefits from structured class design, suggest this skill.