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Guidelines for building high-quality Expo React Native applications with JavaScript, focusing on clean code, modularity, and performance.

Comprehensive performance optimization guide for Framer Motion animations in React applications. Contains 42 rules across 9 categories, prioritized by impact to guide automated refactoring and code generation.

Best practices for full-stack React development with TanStack Start, covering server functions, middleware, SSR, and authentication. \n \n Organizes 31 rules across 10 categories (server functions, security, middleware, authentication, SSR, error handling, and more) with priority levels to guide implementation order \n Covers critical patterns for server-side logic, input validation, secure session management, and client-server boundary handling \n Includes middleware composition, selective SSR

End-to-end testing focused on real user behavior, minimal mocking, and avoiding component unit tests. \n \n Prioritizes E2E tests over unit tests; reserves unit tests for pure functions only \n Emphasizes accessible selectors (role-based, label-based) over CSS selectors and test IDs in E2E tests \n Recommends writing E2E tests instead of heavily mocked unit tests; suggests 3+ mocks as a signal to switch approaches \n Includes rules for test structure, selector strategy, and when to apply each te

Follows type-first, functional, and error handling patterns from CLAUDE.md. This skill covers Zig-specific idioms only.

Native TypeScript support in Node.js with type stripping, async patterns, error handling, and production best practices. \n \n Covers type stripping (Node.js 22.6+) for running .ts files directly without build tools; includes tsconfig.json setup and import extension rules \n Provides patterns for error handling, graceful shutdown, async/await, streams, and module resolution across the full Node.js stack \n Includes diagnostic workflows for flaky tests, profiling slow paths, and performance optim

Cloudflare Workers code review and authoring against production best practices. \n \n Retrieves latest Workers APIs, types, and wrangler configuration schema before reviewing or writing code; biases towards live documentation over pre-trained knowledge \n Covers 40+ best practice rules across configuration, request/response handling, architecture, observability, code patterns, and security \n Flags 15+ common anti-patterns including unbounded streaming, floating promises, global request state, h

Best practices and patterns for Manim Community Edition, the Python animation engine for mathematical visualizations. \n \n Covers Scene structure, mobject types, 15+ animation classes, and LaTeX/MathTex rendering with color control \n Includes 3D support via ThreeDScene, camera manipulation, updaters with ValueTracker, and coordinate systems (Axes, NumberPlane) \n Provides organized rule files for core concepts, text/math, styling, positioning, timing, and CLI usage with quality flags \n Includ

WordPress performance optimization guidelines across database, caching, assets, and plugin architecture. \n \n 34 rules organized by impact across 8 categories: database optimization, caching strategies, asset management, theme performance, plugin architecture, media optimization, API/AJAX, and advanced patterns \n Covers critical areas including WP_Query optimization, transient and object cache usage, proper asset enqueueing, and REST API caching \n Designed for code review and generation workf

Vue 3 Options API patterns, TypeScript integration strategies, and context-binding gotchas. \n \n Covers TypeScript type safety for component properties, this context, prop validators, event handlers, complex types, provide/inject, and computed return types \n Addresses common method and lifecycle hook pitfalls: arrow function binding issues, context loss, and stateful method state leakage across instances \n Organized as a reference guide with linked examples for each pattern and anti-pattern \