practices▌

45 performance optimization rules for React and Next.js, organized by impact from critical waterfalls and bundle size down to advanced patterns. \n \n Covers 8 rule categories prioritized by performance impact: eliminating waterfalls, bundle optimization, server-side performance, client-side data fetching, re-render optimization, rendering performance, JavaScript performance, and advanced patterns \n Each rule includes explanations, incorrect/correct code examples, and context to guide automated

Architectural patterns for coordinating TanStack Query, Router, and Start across full-stack applications. \n \n Covers setup, data flow, caching, and SSR integration with 13 rules organized by priority and category \n Emphasizes loader-based data fetching with ensureQueryData, suspense queries in components, and server functions as query sources \n Provides unified caching and invalidation strategies to prevent duplication and ensure single source of truth \n Includes automatic SSR dehydration/h

Styling guidelines for the Mastra Playground UI, containing 5 rules across 3 categories. Rules are prioritized by impact to guide automated refactoring and code generation. These rules ensure design system consistency, prevent token drift, and maintain component library integrity.

Laravel Eloquent query optimization and relationship management patterns with N+1 prevention. \n \n Eager load relationships with with() and use withCount() for efficient aggregations instead of triggering additional queries in loops \n Select only needed columns at query time and define return types on relationship methods for better IDE support and clarity \n Use query scopes to encapsulate reusable filtering logic and leverage database-level operations ( update() , increment() ) instead of lo

Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 45 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

ManimGL best practices and patterns for 3Blue1Brown's OpenGL-based animation engine. \n \n Covers InteractiveScene, Tex with LaTeX rendering, camera frame control, and 3D scene setup with lighting and surfaces \n Interactive development workflow with -se flag for checkpoint-based iteration and self.embed() for debugging \n Comprehensive rule files for animations, mobjects, text styling, colors, 3D rendering, and CLI configuration \n Includes working examples and scene templates for basic 2D, mat

Angular Material and CDK rules for component usage, theming, and testing. Use with the core angular-best-practices skill for comprehensive Angular coverage.

MySQL development best practices for schema design, query optimization, and database administration. \n \n Covers schema design with InnoDB as default engine, appropriate data types (DECIMAL for financial data, utf8mb4 charset), and primary key strategies including AUTO_INCREMENT and UUID storage \n Indexing strategies including B-tree, FULLTEXT, and covering indexes with guidelines on column selectivity and composite index ordering \n Query optimization using EXPLAIN analysis, prepared statemen

Structured guidance for designing, executing, and analyzing content experiments to improve conversion and engagement. \n \n Covers hypothesis frameworks, metric selection, sample size calculation, and statistical significance testing across A/B and multivariate experiments \n Includes detailed resources on p-values, confidence intervals, power analysis, and Bayesian methods for interpreting results \n Provides CMS integration patterns for managing variants at the field level and connecting exter

51 rules for writing clean, type-safe, modern PHP 8.x code aligned with PSR standards and SOLID principles. \n \n Covers 7 rule categories: type system, modern PHP features (8.0–8.5), PSR standards, SOLID principles, error handling, performance, and security \n Version-aware guidance that detects PHP version from composer.json and runtime, recommending only features available in the target version \n Organized by priority: type safety and security are critical; modern features and SOLID principl