Frontend

Shiny application development patterns and best practices. Covers app structure, reactivity, UI design with bslib/shinywidgets, and performance optimization. Use when building or reviewing Shiny applications.

Создание интерактивных HTML-документов для юридических и аналитических материалов — резюме арбитражных решений, процессуальных приказов, отчётов, аналитических записок. Использовать для создания красивых mobile-first HTML-документов с аккордеонами, таймлайнами, навигацией и профессиональным дизайном в сине-золотой цветовой гамме.

Create a new Next.js project with FSD (Feature-Sliced Design) architecture, TypeScript, Tailwind CSS, ESLint (flat config), Prettier, and Husky. Use when user asks to create/scaffold/initialize a Next.js project with FSD architecture, or when they want a production-ready Next.js boilerplate with modern tooling setup.

Research product compositions using AI and web sources. Use when needing to find what products, substances, or objects are made of - including ingredients, materials, chemicals, and elements. Essential for building composition data.

Use when reviewing code or PRs in the llama-stack repository (llamastack/llama-stack on GitHub). Provides specialized knowledge about Llama Stack's architecture, testing patterns (recordings folders), backward compatibility requirements, distributed system considerations, and code review focus areas specific to this project.

Guide Clojure and ClojureScript development using REPL-driven workflow, coding conventions, and best practices. Use when writing, developing, or refactoring Clojure/ClojureScript code.

Provides foundational CSS design tokens (custom properties) for typography, spacing, colors, borders, z-index, and transitions. Use when setting up a base token system for a web project.

Write consistent, maintainable CSS using the project's methodology (Tailwind, BEM, CSS Modules) with proper design tokens and performance optimization. Use this skill when writing or modifying styles, CSS classes, Tailwind utilities, or styling-related code. When working on files like *.css, *.scss, *.module.css, tailwind.config.js, or components with inline/utility styles. When applying design system tokens (colors, spacing, typography), avoiding framework style overrides, or optimizing CSS for production with purging/tree-shaking.

Use when determining animation durations, controlling pacing, establishing rhythm, or making motion feel appropriately weighted and emotionally resonant.

Build accessible user interfaces using semantic HTML, ARIA attributes, keyboard navigation, and WCAG compliance. Use this skill when creating or modifying UI components, forms, interactive elements, navigation menus, modals, or any user-facing interface code. When working on Astro component files (.astro), React/Vue/Svelte component files, HTML template files, form components with inputs and labels, navigation menus and interactive widgets, modal dialogs and accordions, image components with alt text, button and link implementations, focus management code, or screen reader announcement logic.

Apply comprehensive brand style guidelines to all project work including UI components, code, documentation, and user-facing content. Use when creating or editing Angular components, HTML/CSS, TypeScript code, writing copy, documenting features, or any customer-facing materials to ensure brand consistency.

Guides writing Vitest tests for Chrome extension code. Use when creating tests, improving coverage, or testing Vue components, content scripts, or Chrome APIs.

Convert markdown newsletters to styled HTML matching the Catskill Crew brand and preview in browser

Tailwind CSS styling with CVA variants, data-slots, layout patterns, and z-index management

Trace code execution path before implementing fixes. Forces understanding of fn(args, deps) flows, Result types, and workflow composition. Prevents guessing by requiring file:line references and execution diagrams.

Comprehensive guide for creating effective Claude Code skills with security best practices, CLI-specific features, and structural patterns. Use when creating skills, needing security guidance, understanding skill architecture, or learning best practices.

Generate realistic fake content for HTML prototypes. Use when populating pages with sample text, products, testimonials, or other content. NOT generic lorem ipsum.

Comprehensive change tracking and audit logging system that monitors file modifications, code changes, and project evolution. Use when tracking project history, maintaining audit trails, analyzing development patterns, or when detailed change documentation is required for compliance and team collaboration.. Enhanced with Context7 MCP for up-to-date documentation.

Expert in React 19 and Next.js 16 development with modern patterns including Server Components, hooks, and performance optimization. Use when creating new UI components, refactoring React code, or implementing interactive features.

Use when writing essays, explanations, or blog posts. Applies a Cartesian writing style - clear, methodical, building logically from foundations.