PlantUML diagrams — UML, sequence, class, ER, and C4 architecture diagrams via text-based DSL
Add the marketplace (inside Claude Code):
/plugin marketplace add Agents365-ai/365-skillsInstall the plugin:
/plugin install plantumlDocument processing (Excel, Word, PowerPoint, PDF) and example skills (design, MCP builder, web artifacts).
Design fluency for frontend development. 1 skill with 23 commands (/impeccable polish, /impeccable audit, /impeccable critique, etc.) and curated anti-pattern detection.
Curated upstream: Vercel-Labs React/Next.js skills — performance best practices, composition patterns (compound components, render props), and React Native / Expo conventions for mobile.