Frontend

Write and run JavaScript/TypeScript tests using Vitest or Jest with mocking, component testing, and coverage. Use when writing JS/TS tests, testing Svelte/React components, or setting up test configuration.

Creates and manages C4 architecture diagrams using PlantUML. Use when the user wants to visualize software architecture, create context/container/component/sequence diagrams, document system design with the C4 model, or mentions architecture diagrams, system design, or PlantUML. Supports iterative diagram building through conversational workflow.

Guide experienced developers through TDD failure scenarios and recovery procedures when tests behave unexpectedly

Best practices for component CSS, design system consistency, and layout patterns. Use when authoring component styles.

Best practices for developing zensical/Material for MkDocs static sites. Covers installation, virtual environments, project structure, responsive images, CSS, media embedding, and verification. Use for ANY Material for MkDocs project development beyond basic text editing.

Astro 5.0 + Tailwind CSS landing page with blog, dark mode, and perfect PageSpeed scores.

Run Python code in lesson context with proper uv and venv handling for agent-spike project. Activate when user wants to run tests, demos, or CLI commands for lessons in lessons/ directories. Project-specific for agent-spike multi-agent learning.

Apply Forth AI brand guidelines when creating frontends. Use for UI components, pages, applications, and design systems. Enforces radical simplicity, implicit elegance, abstract graphics, and the Forth AI visual identity.

This skill should be used when creating extensions for Claude Code or OpenCode, including plugins, commands, agents, skills, and custom tools. Covers both platforms with format specifications, best practices, and the ferg-engineering build system.

Generate GenuVerity fact-check reports from structured input (Gemini research output). Use /batch-report to process research into HTML reports. Optimized for token efficiency - expects pre-researched sources.

Review and mitigate XSS risks in WebF apps (sanitize HTML, validate input, avoid unsafe string rendering). Use when the user mentions XSS, sanitize HTML, innerHTML-like rendering, user-generated HTML, or “untrusted input”.

Guide developers through CI/CD pipeline design including architecture patterns, stage design, and security considerations

PRD 기반 프로젝트 부트스트래핑 & 스킬 관리 시스템.[Mode 1 - 새 프로젝트] "PRD 만들어줘", "새 프로젝트", "프로젝트 시작"[Mode 2 - 스킬 추가] "스킬 추가해줘", "frontend 스킬 만들어줘", "backend 스킬 적용"[Mode 2 - 디자인 참조] "이 사이트처럼 만들어줘", "이 디자인 참고해줘" + URL[Mode 2 - 동적 스킬] "AI 스킬 추가해줘", "이 패턴 스킬로 만들어줘" (템플릿 없어도 생성)[Mode 3 - 동기화] "PRD 변경사항 반영해줘", "스킬 동기화"[Mode 4 - 코드 역분석] "PRD 만들어줘" + 기존 코드 존재, "코드 분석해서 PRD 만들어줘"[Mode 5 - 문서 검증] "프로젝트 분석해줘" + PRD/CLAUDE.md 존재, "문서 검증해줘"

Use before implementation when refining rough ideas into specs. Guides collaborative design through Socratic questioning, alternative exploration, and incremental validation. Triggers: 'brainstorm', 'design', 'explore options', 'figure out', 'think through', 'what approach'.

Declarative macOS environment management via Nix. Use when user wants to install packages, add CLI tools, configure programs, manage dotfiles, or modify their development environment. Covers adding packages, the pnpm dlx wrapper pattern for npm tools, and rebuilding the system.

Guide developers through PostgreSQL setup, connection configuration, query patterns, and best practices

This skill should be used when the user asks about "ActiveRecord", "database queries", "query optimization", "N+1 queries", "eager loading", "associations", "migrations", "database indexes", "SQL performance", "ActiveRecord callbacks", "scopes", or needs guidance on efficient database access patterns in Rails 7+.

Guide for MUSUBIX SDD (Specification-Driven Development) workflow. Use this when asked to develop features using MUSUBIX methodology, create requirements, designs, or implement code following the 9 constitutional articles.

Build and deploy this Next.js application with PostgreSQL database. Use when building, deploying, setting up database, or preparing the project for production.

Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly.