Prototyping and testing skills: wireframe specs, usability heuristics, heuristic evaluations, accessibility audits, A/B test design, and benchmark analysis.
Add the marketplace (inside Claude Code):
/plugin marketplace add Owl-Listener/designer-skillsInstall the plugin:
/plugin install prototyping-testingDesign fluency for frontend development. 1 skill with 23 commands (/impeccable polish, /impeccable audit, /impeccable critique, etc.) and curated anti-pattern detection.
Integration with OpenAI Codex CLI for complex code generation and debugging
Curated upstream: Vercel-Labs React/Next.js skills — performance best practices, composition patterns (compound components, render props), and React Native / Expo conventions for mobile.