Backend

Analyzes git history to identify commit patterns, branching habits, workflow inefficiencies, and collaboration opportunities. Use when users mention git workflows, commits, branches, rebasing, merge conflicts, PR strategy, force push, git aliases, or express frustration with git operations.

Follow project-wide development conventions for project structure, documentation, version control, code review, environment configuration, dependency management, and security practices. Use this skill when setting up new projects, organizing file structures, writing project documentation, creating Git branches and commits, configuring environment variables, managing dependencies, setting up CI/CD pipelines, or implementing security practices. Apply when working on project setup tasks, creating documentation files (README.md, ARCHITECTURE.md, DATABASE_SCHEMA.md, API_REFERENCE.md, SETUP.md), Git workflow operations, .env files, package.json/bun.lockb, Docker configurations, or any cross-cutting project concerns. This skill ensures hybrid code organization (global shared code by type + feature-specific code with nested subdirectories), required documentation (README, ARCHITECTURE, DATABASE_SCHEMA, API_REFERENCE, SETUP - written before coding then updated), GitHub Flow workflow (main branch production-ready, feat

FastAPI patterns for building high-performance Python APIs. Covers routing, dependency injection, Pydantic models, background tasks, WebSockets, testing, and production deployment.

백엔드 개발자 온보딩 실습 (SAX-Backend 패키지 전용). Use when (1) sax-core/skill:onboarding에서 호출,(2) 백엔드 개발자 온보딩 실습 필요 시. API 설계 및 백엔드 워크플로우 체험.

Comprehensive guide to Python async/await patterns, best practices, and anti-patterns. Covers asyncio fundamentals, coroutines, async context managers, task management, common libraries (aiohttp, aiofiles, asyncpg), framework integration (FastAPI, Django), performance considerations, and proper exception handling. Use when reviewing or writing asynchronous Python code.

Define and structure database models with proper data integrity, relationships, and validation. When creating or modifying database model files (models/*, *.model.ts, schema.ts, schema.prisma, drizzle.config.ts). When working on ORM schemas, database table definitions, or data structure specifications. When defining model relationships, constraints, foreign keys, indexes, or validation rules. When implementing timestamps, data types, or cascade behaviors for database entities.

Use when need to bypass Cloudflare protection, scrape websites with anti-bot measures, render JavaScript pages, or simulate real browser behavior for web scraping

This skill should be used when generating and editing images using the Gemini API (Nano Banana Pro). It applies when creating images from text prompts, editing existing images, applying style transfers, generating logos with text, creating stickers, product mockups, or any image generation/manipulation task. Supports text-to-image, image editing, multi-turn refinement, and composition from multiple reference images.

Use when creating new repositories or initializing existing directories with KellerAI standards. Provides step-by-step workflow for TaskMaster setup, Claude Code configuration, MCP server integration, and standard directory structure.

Generate production-ready Express + TypeScript + PostgreSQL + Redis projects. Use when the user wants to create a new backend service, API, or microservice from scratch. Automatically invoked when discussing project scaffolding or generation.

Expert assistant for Juju charm development using jhack utilities. Use when debugging charms, inspecting relations, syncing code, replaying events, testing scenarios, or performing rapid development iterations. Keywords include jhack, Juju debugging, charm testing, relation inspection, event replay, sync, tail, fire, show-relation, show-stored.

Comprehensive Shopify development expert with access to 24 official documentation files covering APIs (GraphQL Admin, Storefront, REST), app development, themes, Liquid, Hydrogen, checkout, extensions, webhooks, Functions, CLI, subscriptions, payments, and all platform features. Invoke when user mentions Shopify, e-commerce, online store, product management, orders, checkout, themes, or headless commerce.

Interactive Archon integration for knowledge base and project management via REST API. On first use, asks for Archon host URL. Use when searching documentation, managing projects/tasks, or querying indexed knowledge. Provides RAG-powered semantic search, website crawling, document upload, hierarchical project/task management, and document versioning. Always try Archon first for external documentation and knowledge retrieval before using other sources.

Search and download torrents using ArcTorrent API and WebTorrent. Use when users request to: (1) Search for torrents across multiple sources, (2) Download content via magnet links, (3) Find torrents filtered by seeder counts, or any torrent-related tasks

Master advanced ASP.NET Core development including Entity Framework Core, authentication, testing, and enterprise patterns for production applications.

Build async APIs with FastAPI, including endpoints, dependency injection, validation, and testing. Use when creating REST APIs, web backends, or microservices.

Creates comprehensive GitHub project documentation including README, CONTRIBUTING, CODE_OF_CONDUCT, CHANGELOG, architecture docs, and API documentation. Analyzes codebase to generate accurate, well-styled documentation with modern GitHub aesthetics. Use when setting up a new project, improving existing documentation, or generating missing docs.

Comprehensive management capabilities for Z.AI MCP servers, including quota tracking, health monitoring, configuration validation, and usage analytics for the Z.AI Lite Plan. Manages web-search-prime and web-reader MCP servers with intelligent monitoring and optimization.

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.