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Found 660 Skills
Use when a frontend needs motion choreography, interaction polish, and scroll behavior that improves hierarchy without hurting performance. Works alongside layout and style skills instead of replacing them.
Use when writing, reviewing, or debugging pure Ruby code — idiomatic patterns, modern 3.x+ features (pattern matching, Data.define, endless methods), error handling conventions (raise vs fail, result objects), memoization, and performance idioms. For Rails use rails-guides. For testing use minitest. For code style use sandi-metz-rules.
Use this skill whenever building, reviewing, or refactoring React components that fetch data from APIs — especially at scale (recommender carousels, infinite feeds, pages with many parallel fetches, dashboards). Covers request orchestration (parallelism, batching, deduplication), cache strategy (keys, normalization, staleTime, SWR), backend protection (concurrency caps, debounce/throttle, jittered retries, circuit breakers), prefetching (route loaders, hover/intent, idle, server hydration), failure resilience (AbortController, timeouts, error boundaries, stale fallback, idempotent mutations), and feed/carousel patterns (virtualization, cursor pagination, summary/detail split). Trigger even if the user doesn't explicitly mention "performance" or "scale" — any non-trivial React data-fetching code benefits from these patterns. Includes 5 ready-to-use scaffolding templates (resource query hook, carousel data loader, infinite feed, hover-prefetch link, request collapser).
Build React components, implement responsive layouts, and handle client-side state management. Masters React 19, Next.js 15, and modern frontend architecture. Optimizes performance and ensures accessibility. Use PROACTIVELY when creating UI components or fixing frontend issues.
Use when writing or reviewing geometry, simulation, collision, navigation, culling, procedural generation, transforms, or other performance-sensitive algorithms with the npm `math` package, or when the user invokes /math. Not for routine arithmetic or textbook explanations.
Comprehensive React development with hooks, components, state management, context, effects, and performance optimization based on official React documentation
Master Minecraft server plugin development with Bukkit, Spigot, and Paper APIs. Specializes in event-driven architecture, command systems, world manipulation, player management, and performance optimization. Use PROACTIVELY for plugin architecture, gameplay mechanics, server-side features, or cross-version compatibility.
Use when optimizing Tailwind CSS for production, reducing bundle size, and improving performance. Covers PurgeCSS, JIT mode, and build optimization.
Comprehensive best practices for Inertia Rails development. Use when writing, reviewing, or refactoring Inertia.js Rails applications with React, Vue, or Svelte frontends. Covers server-side setup, props management, forms, navigation, performance, security, and testing patterns.
Svelte coding guidelines for the Windmill frontend. MUST use when writing or modifying code in the frontend directory.
Create efficient data pipelines with tf.data
React Native best practices expert. PROACTIVELY use when working with React Native, mobile apps, Expo. Triggers: react-native, expo, mobile, iOS, Android, NativeWind