Development

Use when implementing iOS 26 features (Liquid Glass, new SwiftUI APIs, WebView, Chart3D), deploying iOS 26+ apps, or supporting backward compatibility with iOS 17/18.

Sanitizing and validating user input to prevent XSS, injection attacks, and security vulnerabilities in TypeScript applications

Optimize system prompts for Claude Code agents using proven prompt engineering patterns. Use when users request prompt improvement, optimization, or refinement for agent workflows, tool instructions, or system behaviors.

"""Best practices and patterns for writing idiomatic Rust code.

Utility scripts directory configuration (/scripts) for MetaSaver monorepos including setup automation, environment management, and cross-platform support. Includes 4 critical standards (setup scripts, cross-platform support, error handling, documentation). Use when creating or auditing /scripts directory with Node.js and shell utility scripts.

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI). Generates creative, polished code and UI design that avoids generic AI aesthetics.

Use when writing background jobs or async operations - enforces thin job wrappers (3-5 lines) that delegate to models using _later/_now naming pattern

Expert implementation guide for custom Clean Architecture pattern in Golang projects. Use when implementing features with domain-driven design, creating API endpoints, or working with this specific 4-layer architecture (Domain, Application, Integration, Infrastructure). NOT Uncle Bob's standard Clean Architecture - this is a specialized adaptation with strict dependency rules and specific conventions.

Transforms design tokens into platform-specific formats (CSS, SCSS, iOS Swift, Android XML). Use when setting up multi-platform token pipelines, creating build processes, or managing cross-platform design systems.

Create and modify Django models with proper fields, relationships, and soft-delete support. Use when adding models, modifying fields, creating relationships, or changing database schema.

Use when implementing any feature or bugfix, before writing implementation code - write the test first, watch it fail, write minimal code to pass; ensures tests actually verify behavior by requiring failure first

Capture screenshots and run E2E tests with Playwright. Use for frontend debugging, visual inspection, or user flow validation. (project)

Navigation and routing patterns for React web applications. Use when implementing React Router, Next.js routing, deep links, or handling navigation state.

파싱된 리서치 데이터를 기반으로 TypeScript 테스트 데이터 파일 생성. 새 테스트 추가, subjects/*.ts 파일 생성 시 사용.

Use this skill when you need to code with tailwind css

Creates comprehensive tutorials to teach users any skill from the skills library. Use when users want to learn a skill, need a tutorial, ask for guidance on using a skill, or want to apply a skill to their project. Guides users from understanding to practical implementation through hands-on exercises.

Validates PopKit code quality using concrete metrics for DRY, coupling, cohesion, and architectural patterns

Create professional diagrams using Mermaid or DOT/Graphviz. Mermaid for flowcharts, sequences, classes, ER, Gantt, architecture with semantic coloring and WCAG AA accessibility. DOT/Graphviz for pure network graphs, semantic webs, and maximum layout control.

Pulumi infrastructure as code using Python with Pulumi Cloud and ESC integration. Use when working with Pulumi Python projects, ESC environments, dynamic secrets, OIDC credentials, or infrastructure automation with Python.

Solve complex multi-constraint problems through systematic web search using multiple engines with adaptive strategies.