Backend

Validate backend development environment and authentication status. Use when (1) new backend developer onboarding, (2) checking required tools (gh CLI, Git, Node, pnpm, Supabase), (3) verifying GitHub auth and repo access, (4) orchestrator auto-runs at work start.

Always use Context7 MCP to fetch up-to-date library/API documentation before generating code that depends on external libraries or config. Use when the user asks for setup steps, configuration, or code involving third-party libraries. Prefer Context7 docs over memory. Include citations to the retrieved docs when possible.

Overview of popular backend frameworks across different languages.

Expert system for integrating Apple Developer APIs including App Store Connect API, App Store Server API, Sign in with Apple REST API, App Store Server Notifications, Advanced Commerce API, and App Intents. Use this skill when (1) Implementing in-app purchases or subscription management, (2) Setting up App Store Server Notifications webhooks, (3) Creating JWT tokens for Apple API authentication, (4) Managing TestFlight distribution or app metadata, (5) Implementing Sign in with Apple authentication, (6) Working with App Intents or Shortcuts integration, or (7) Any Apple developer API integration.

REST Controller 전문가. Thin Controller 패턴, CQRS Command/Query Controller 분리,ResponseEntity<ApiResponse<T>> 래핑, @Valid 검증 필수. DELETE 금지(PATCH 사용).TestRestTemplate 필수 (MockMvc 금지). UseCase 의존. Mapper DI.

Optimal multi-agent coordination strategies for the rails-architect

DevExpress 25.1.6.0을 활용한 ASP.NET 웹 페이지 개발 전문가 스킬. ASP.NET Web Forms, MVC 패턴, DevExpress Bootstrap 컨트롤, Bootstrap 반응형 디자인 작업 시 사용. (1) ASP.NET 웹 페이지 생성, (2) DevExpress Bootstrap 컨트롤(BootstrapGridView, BootstrapComboBox, BootstrapDateEdit, BootstrapButton, BootstrapSpinEdit 등) 구현, (3) XPO DataBinding 설정, (4) PopupEditForm 편집 패턴 구현, (5) Code-behind 작성 시 사용.

Generate unit tests, integration tests, and test fixtures for code. Supports Jest, Mocha, pytest. Use when writing tests or improving test coverage.This skill provides automated test generation:- Unit tests with AAA pattern (Arrange, Act, Assert)- Integration tests for APIs and databases- Test fixtures and mocks- Edge case identification- Test coverage recommendationsTriggers: "generate tests", "create unit test", "add test coverage", "write tests", "テスト生成", "テストコード作成", "カバレッジ向上"

Build Retrieval-Augmented Generation (RAG) systems for LLM applications with vector databases and semantic search in FastAPI backends. Use when implementing knowledge-grounded AI, building document Q&A systems, or integrating LLMs with external knowledge bases.

Use when user says "update story tree", "show story tree", "show me a map", "story map", "tree diagram", "show stories", "view stories", "list stories", or asks for story visualization or tree status - autonomously maintains hierarchical story backlog by analyzing git commits, identifying under-capacity nodes, and coordinating story generation to fill gaps. Works with SQLite database using closure table pattern, prioritizes shallower nodes first, and tracks implementation status through commit analysis.

Systematic code review workflow to evaluate changes against Java and Spring standards. Use when reviewing Pull Requests, commits, or diffs. Ensures robustness, maintainability, and adherence to best practices.

MCP server implementation with Express.js and TypeScript.

Activate when users ask about Claude Code installation, slash commands (/cook, /plan, /fix, /test, /docs, /design, /git), creating/managing Agent Skills, configuring MCP servers, setting up hooks/plugins, IDE integration (VS Code, JetBrains), CI/CD workflows, enterprise deployment (SSO, RBAC, sandboxing), troubleshooting authentication/performance issues, or advanced features (extended thinking, caching, checkpointing).

Integrates OpenAI APIs for chat completions, embeddings, and image generation. Use when building AI-powered features with GPT models, DALL-E, or Whisper in Node.js applications.

Astro framework patterns for SSR/SSG, middleware, and TypeScript. Use when working with Astro pages, API routes, middleware configuration, or debugging rendering issues. Trigger phrases include "Astro", "prerender", "middleware", "SSR", "SSG", "static site".

Keep documentation in sync with code changes. Use when implementing features, modifying APIs, changing architecture, adding configuration, updating security, or making any changes that affect user-facing or developer-facing documentation.

指南：创建高质量的 MCP（模型上下文协议）服务器，使 LLM 能够通过精心设计的工具与外部服务交互。在构建 MCP 服务器以集成外部 API 或服务时使用，无论是 Python（FastMCP）还是 Node/TypeScript（MCP SDK）。

Flatten nested conditionals with early returns or table-driven methods - keep nesting depth under 3 levels

Comprehensive FHIR (Fast Healthcare Interoperability Resources) software development assistant. Use when working with FHIR APIs, implementations, or healthcare data exchange. Supports FHIR R4, R4B, R5, Implementation Guides (IGs), validation, terminology, and SMART on FHIR. Ideal for building FHIR servers, clients, validators, or healthcare applications that need to process FHIR resources.

Cronlytic cron job scheduler API via curl. Use this skill to create, manage, pause/resume scheduled HTTP requests and webhook automation.