C4 Documentation Skill Create architecture documentation using the C4 model's four levels of abstraction. MANDATORY: Documentation-First Approach Before creating C4 documentation: 1. Invoke skill for C4 patterns 2. Verify C4 model syntax via MCP servers (context7 for Structurizr/Mermaid) 3. Base guidance on c4model.com official documentation C4 Model Overview Level 1: System Context Diagram Purpose Shows the software system in the context of: - Who uses it (people) - What other systems it interacts with Mermaid Syntax PlantUML/Structurizr DSL Level 2: Container Diagram Purpose Shows the high-…