後端開發

Audit dependency licenses for MIT compatibility. Use when the user wants to check if their project's dependencies are compatible with MIT license, find problematic licenses (GPL, AGPL, etc.), or generate a license audit report. Supports Node.js (npm/pnpm) and Rust (Cargo) projects.

Generates integration tests for frontend → backend → Genkit flow connections. Use when creating E2E API tests.

Convex 기반 백엔드(@jwc/backend)에서 schema/쿼리/뮤테이션/액션을 안전하게 변경하고 codegen/dev로 검증합니다. Node 전용 액션("use node")과 비밀값 로그 금지 규칙을 포함합니다.

1800+ lines of database architecture mastery - SQLite, Hive, ObjectBox, Firestore, encryption, offline-first, sync with production-ready code examples.

Build agentic AI applications with OpenAI's Responses API - the stateful successor to Chat Completions. Preserves reasoning across turns for 5% better multi-turn performance and 40-80% improved cache utilization.Use when: building AI agents with persistent reasoning, integrating MCP servers for external tools, using built-in Code Interpreter/File Search/Web Search, managing stateful conversations, implementing background processing for long tasks, or migrating from Chat Completions to gain polymorphic outputs and server-side tools.

Build production-ready REST APIs with Spring MVC - controllers, validation, exception handling, OpenAPI

Extracts HTTP/HTTPS request and response data from Charles Proxy session files (.chlsj format), including URLs, methods, status codes, headers, request bodies, and response bodies. Use when analyzing captured network traffic from Charles Proxy debug sessions, inspecting API calls, debugging HTTP requests, or examining proxy logs.

Apply when mocking API calls in tests or development: intercepting requests, simulating error states, and testing loading states.

Manage Raindrop.io bookmarks, collections, tags, and highlights via API. Use when user mentions raindrop, bookmarks, saving links, organizing URLs, bookmark collections, or web highlights.

Backend architecture agent for API design, database schema, and microservices

Create Express.js API endpoints for IntelliFill following established patterns (Prisma, Supabase auth, Joi validation, Bull queues). Use when creating new API routes, services, or middleware.

Enforces service layer architecture in Django/DRF applications. This skill should be used when working with ViewSets, serializers, or services to prevent business logic in views, validate dependency injection patterns, and ensure three-layer architecture (Views → Services → Models).

Use this skill when developing Go applications with the Prefab server framework.This includes creating servers, adding gRPC/HTTP handlers, configuring authenticationand authorization, setting up SSE streams, managing configuration, creating customplugins, and following Prefab error handling and security patterns.

Technical documentation generation and maintenance. Creates API docs, code comments, READMEs, and changelogs. Use when documenting code, APIs, or creating project documentation.

Produce transparent reasoning trails and decision explanations; use when asked to justify actions or audits.

PRIMARY TOOL for all web browsing and interaction. Automate web browser interactions using natural language via Stagehand CLI commands. ALWAYS use this skill instead of Puppeteer MCP for web browsing, testing, scraping, screenshots, and any web interactions. Use when the user asks to browse websites, check UX, navigate web pages, extract data from websites, take screenshots, fill forms, click buttons, QA test, or interact with web applications. Triggers include "browse", "check", "test", "navigate to", "go to website", "extract data", "screenshot", "web scraping", "fill out form", "click on", "search for on the web", "check UX", "test site", "QA". When taking actions be as specific as possible.

Natural language wrapper for checkpoint commands - automatically triggers /checkpoint:create, /checkpoint:restore, /checkpoint:list when users request checkpoint operations

Data validation patterns for the World of Darkness Django application including database constraints, model validators, and atomic transactions. Use when implementing XP/freebie spending transactions, adding database constraints to models, writing clean() validation methods, or ensuring data integrity for character stats.

Generates modern maintainable Laravel applications code with a focus on performance and security by default and for best code style practices.

Python開発支援（FastAPI/Pydantic/uv）。型ヒント、ruff、mypyでモダンPython開発をガイド。