Design and implement comprehensive testing strategies. Use when setting up tests, choosing test types, implementing TDD, or improving code quality. Covers unit tests, integration tests, E2E tests,...

Comprehensive React and Next.js best practices guide covering performance optimization, component architecture, shadcn/ui patterns, Motion animations, and modern React 19+ patterns. This skill...

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Central hub for managing user preferences, learning patterns, and adapting skill behavior based on historical feedback. Enables "tell me once" paradigm where the system remembers and adapts.