Development

Guide for contributing to the OpenAPI layer using processor pattern, complexity management, and functional programming. Use when adding endpoint factories, processors, parameter descriptions, reducing cyclomatic complexity, or fixing OpenAPI validation errors. Covers architecture patterns from user-service repository.

Proactively analyze git repository status. Use automatically before git operations and during code reviews. Must be used when examining repository state, commit history, or file changes.

Next.js 16 portfolio with Lottie animations, contact form (Email/Telegram), dev.to integration.

Reverses and exploits mobile applications. Use when working with Android APK files, iOS IPA files, mobile app reversing, Frida hooking, or app security analysis challenges.

Comprehensive Blazor development expertise covering Blazor Server, WebAssembly, and Hybrid apps. Use when building Blazor components, implementing state management, handling routing, JavaScript interop, forms and validation, authentication, or optimizing Blazor applications. Includes best practices, architecture patterns, and troubleshooting guidance.

Apply and validate the 7 Key Principles to code - TDD, Fail Fast, Modular, Reuse, Open Source, No Debt, Excellence. Checks code compliance and suggests improvements. Use during code review or refactoring.

Build AI-first applications with RAG pipelines, embeddings, vector databases, agentic workflows, and LLM integration. Master prompt engineering, function calling, streaming responses, and cost optimization for 2025+ AI development. Includes local LLM inference with Ollama for 93% CI cost reduction.

Capture content from JavaScript-rendered pages, login-protected sites, and multi-page documentation using Playwright MCP tools or Claude Chrome extension. Use when WebFetch fails on SPAs, dynamic content, or auth-required pages.

Framework-agnostic brutalist web design system with Space Grotesk typography, purple/cyan/pink palette, bold offset shadows, and sharp borders. Use when building any web interface (HTML, React, Vue, Svelte, Astro, etc.) that needs neo-brutalist aesthetics with consistent design tokens, typography scale, and component patterns.

Use when reviewing code for quality, security vulnerabilities, and best practices

Creates and updates modular project rules for Claude Code in .claude/rules/ directory. Use when creating, updating, or modifying rule files, organizing project guidelines, setting up code standards, or when user mentions "create rules", "update rules", "add rules", or "rule configuration".

Claude Code 작업 결과를 6개 영역(분석, 계획, 구현, 리뷰, 검증, 테스트)에서 평가하고 구체적인 피드백을 생성합니다. 결과 수집, 영역별 점수화, P0/P1/P2 우선순위 피드백, 자기비판, 성찰, 재평가 사이클을 통해 품질을 개선합니다. Use when evaluating code results, generating feedback, reviewing implementation quality, assessing test coverage.

Chrome's built-in Prompt API implementation guide. Use Gemini Nano locally in browser for AI features - session management, multimodal input, structured output, streaming, Chrome Extensions. Reference for all Prompt API development.

Write, configure, and optimize GitHub Actions workflows including syntax, triggers, jobs, contexts, expressions, artifacts, and CI/CD patterns

Better Auth TypeScript/JavaScript authentication library. Use when implementing auth in Next.js, React, Express, or any TypeScript project. Covers email/password, OAuth, JWT, sessions, 2FA, magic links, social login with Next.js 16 proxy.ts patterns.

Build Shopify applications, extensions, and themes using GraphQL/REST APIs, Shopify CLI, Polaris UI components, and Liquid templating. Capabilities include app development with OAuth authentication, checkout UI extensions for customizing checkout flow, admin UI extensions for dashboard integration, POS extensions for retail, theme development with Liquid, webhook management, billing API integration, product/order/customer management. Use when building Shopify apps, implementing checkout customizations, creating admin interfaces, developing themes, integrating payment processing, managing store data via APIs, or extending Shopify functionality.

Building reusable React state machine skills with XState v5 and the actor model

Builds web applications with Vite including dev server, production builds, plugins, and configuration. Use when scaffolding projects, configuring build tools, optimizing bundles, or setting up development environments.

Expert guidance for leveraging Tailwind CSS V4's new Oxide engine, CSS-first configuration, and modern styling paradigms. This skill transforms Claude into a Tailwind V4 architecture specialist, capable of designing component systems, optimizing performance, and executing complex styling challenges with precision.

Intelligently choose between semantic and text search based on query intent. Automatically selects the best search mode (semantic for concepts, text for exact terms, symbols for definitions) and provides relevant results. Use when user wants to find code.