Backend

Handling authentication and authorization in StickerNest. Use when the user asks about login, signup, auth, session, protected routes, user context, JWT, tokens, logout, or permission checks. Covers Supabase Auth, AuthContext, protected routes, and widget auth.

Build production-ready Rust backend APIs with Axum framework. Covers router composition, state management, extractors, middleware (auth, tracing), error handling with IntoResponse, and graceful shutdown. Use when building Rust web services, REST APIs, or when working with Axum, Tower middleware, or async Rust backends.

Comprehensive AI/ML development guide for LangChain, LangGraph, and ML model integration in FastAPI. Use when building LLM applications, agents, RAG systems, sentiment analysis, aspect-based analysis, chain orchestration, prompt engineering, vector stores, embeddings, or integrating ML models with FastAPI endpoints. Covers LangChain patterns, LangGraph state machines, model deployment, API integration, streaming, error handling, and best practices.

Write Roblox games in TypeScript. Use for roblox-ts setup, configuration, type-safe Roblox API usage, project structure, package management, compiling TypeScript to Luau, debugging, and working with roblox-ts packages and best practices.

Write TypeScript code for n8n nodes following proper naming conventions, file organization, import ordering, and type safety patterns. Use this skill when creating or editing .node.ts files, .credentials.ts files, helper files, or any TypeScript files in an n8n community node package. Apply when naming classes, defining node properties, organizing imports, ensuring type safety, or structuring n8n node packages.

Scaffolds a new Python tool utility in 'src/tools/' for agents to call. Tools are utility functions (web scraping, PDF parsing, database queries) that agents use. Use when creating utilities that agents depend on.

Write Node.js CLI tools with zero dependencies. Use when creating command-line tools, argument parsing, colored output, or interactive prompts.

Exposing StickerNest APIs to widgets via the Protocol. Use when the user asks about widget API, widget requests, social API for widgets, widget permissions, widget:request, or how widgets call backend services. Covers Protocol messages, request handling, and permission system.

Target backend architecture for Lingx. DDD-lite patterns with services, result objects, use cases, and error handling. Use when implementing backend features, reviewing code, or making architectural decisions.

Reviews and generates .NET/C# code following Microsoft conventions and modern patterns.Use when reviewing C# files, writing .NET code, refactoring, or when user mentions"C#", ".NET", "dotnet", "csharp", or asks about naming conventions in .NET projects.

Sync API contracts between FastAPI backend and React frontend. Triggers on "sync api", "update contracts", "generate types", "оновити контракти", "згенерувати типи", or when backend schemas change.

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).

Manage environment variables and secrets using Varlock. Use when configuring applications, securing API keys, migrating from dotenv, or setting up secrets management workflows.

Azure AD OAuth2/OIDC SSO integration for Kubernetes applications. Use when implementing Single Sign-On, configuring Azure AD App Registrations, restricting access by groups, or integrating tools (DefectDojo, Grafana, ArgoCD, Harbor, SonarQube) with Azure AD authentication.

Architecture patterns for rRNA-Phylo project including FastAPI backend design, service organization, async task processing with Celery, Pydantic schemas, testing with pytest, Biopython integration, and API design conventions. Covers project structure, dependency injection, error handling, and configuration management.

Install Jina AI MCP for web scraping. Use when user needs Jina Reader for URL content extraction.

Guide for creating Fastify route handlers with TypeBox schemas and OpenAPI documentation. Use when adding new routes to app/src/routes/.

バックエンド開発（FastAPI/Python）のベストプラクティスと規約

Implement common Django design patterns including managers, querysets, mixins, services, and architectural patterns. Use when refactoring code or implementing standard Django patterns.

Design and implement RESTful API endpoints following best practices for URL structure, HTTP methods, status codes, versioning, and rate limiting. Use this skill when creating or modifying API routes, controllers, endpoint handlers, or route files. When working on files like routes.ts, api/*.ts, controllers/*.ts, endpoints/*.py, views.py, or any server-side request handlers. When designing resource URLs, implementing CRUD operations, adding query parameters for filtering/sorting/pagination, or setting up API versioning. When reviewing or refactoring existing API code for REST compliance.