Accessibility guide (WCAG 2.1/2.2, Level A–AAA).

Advanced data tables with AG Grid.

Standards-compliant agent definitions with templates.

Architectural decision guide by complexity.

Fast static sites with SSG/SSR and component islands.

Backend development workflow with API design and data modeling.

Structured ideation and decision-making for software.

Fast JavaScript/TypeScript runtime with bundling and testing.

Prevent cascading failures by short-circuiting failing services.

Layer-based architecture with inward dependency rule.

Universal naming, structure, and organization conventions.

Linting and formatting across tools.

Systematic code refactoring with risk mitigation.

Two-stage code review: spec compliance then code quality.

Composition Over Configuration for flexible component design.

Rigorous code review and improvement partner.

Modern CSS with Grid, Flexbox, and custom properties.

Domain-Driven Design for complex business domains.

Eliminate knowledge duplication via abstraction.

End-to-end testing patterns and best practices.

English writing rules for generated content and code.

Managed workflow for cross-platform mobile apps with EAS.

Express.js routing, middleware, and error handling.

Form and schema validation across libraries.

Frontend workflow with componentization and state management.

Ports and Adapters isolating application core from external concerns.

Lightweight edge/serverless APIs with Hono.

Semantic HTML with proper elements and structure.

Human-centric communication with empathy and clarity.

UI/UX design patterns for software.

Modern JavaScript (ES2020+) patterns.

Unit, integration, and snapshot testing with Jest.

Decouples components via centralized mediator.

Material UI components with theming and sx prop.

NestJS modular architecture with dependency injection.

Fullstack React with SSR/SSG and API routes.

Node.js backend patterns with async I/O and process management.

Batch execution with checkpoints.

Cross-browser E2E testing with Playwright.

Slide deck generation for PowerPoint and Google Slides using PptxGenJS.

Context prompts for AI assistants with schema validation.

Modern React with hooks and functional components.

Cross-platform mobile development with React Native.

User-centric React Native component testing.

User-centric React component testing.

Predictable state management with Redux Toolkit.

Reference files for complex skills (40+ patterns).

Type-safe error handling via Result<T>.

Domain-first folder structure reflecting business capabilities.

Auxiliary service sharing lifecycle with main service.

Standards-compliant skill creation with templates and validation.

Synchronization across model directories.

SOLID principles for maintainable OOP design.

Browser automation and test orchestration.

Model logic as explicit states and transitions.

Fresh subagents per task with two-stage reviews.

Root cause analysis and systematic error investigation.

Utility-first CSS with responsive design.

Clear technical writing for documentation and commits.

Test planning, pyramid decisions, and coverage strategy.

Strict typing and type-safe development.

Unit testing patterns for frontend and backend.

Evidence-based verification with gate function.

Fast build tool with HMR for modern web development.

Web performance optimization and Core Web Vitals.

SEO meta tags, structured data, and search optimization.

Module bundler with loaders, plugins, and code splitting.

Executable plans with granular tasks and file precision.