Backend

Modern API development patterns for building high-performance, scalable web services. Expert in async/await patterns, REST/GraphQL APIs, middleware, error handling, rate limiting, OpenAPI documentation, testing, and production optimizations. Framework-agnostic patterns that work with Python, Node.js, Go, and other languages.

Harness MCP (Model Context Protocol) server integration for AI-powered CD operations, pipeline management, Git repositories, pull requests, code review comments, and bidirectional Jira synchronization

Use this skill whenever the user wants to design, implement, or refactor authentication and authorization in a NestJS TypeScript backend, including JWT, sessions, refresh tokens, guards, roles/permissions, and integration with modules/services/controllers.

Backend development skill for Cloudflare Workers, D1 database, and REST API. Use when implementing API features.

Apply Material Design 3 Expressive design principles, animations, and component patterns. Use when designing UI, implementing micro-interactions, color systems, or spring-based animations.

Generate execution plan from Song Design Spec (SDS). Extracts section structure, calculates target metrics, and produces ordered work objectives for downstream workflow nodes. Use when processing SDS to determine song arrangement, section ordering, target word counts, and evaluation criteria.

Master ASP.NET Core fundamentals including C#, project structure, routing, middleware, and basic API development. Essential skills for all ASP.NET Core developers.

Abbreviation, initialism, and acronym rules. Manages approved abbreviation whitelist and approval process. Enforces first-letter-only capitalization for initialisms/acronyms to prevent case conversion garbage. Use when encountering any shortened word form.

Generate ABP Application.Contracts layer scaffolding (interfaces, DTOs, permissions) from technical design. Enables parallel development by abp-developer and qa-engineer. Use when: (1) backend-architect needs to generate contracts, (2) preparing for parallel implementation workflow, (3) creating API contracts before implementation.

Connect to and manage remote hosts. Run commands, check logs, debug issues on remote servers. Use when asked about: ssh to server, connect to host, check remote logs, debug remote, run command on server, PPE server, db server, webservice server, remote debug.

Master backend runtimes and programming languages. Learn Node.js, Python, Java, Go fundamentals, async patterns, and runtime-specific best practices.

Laravel v12 - The PHP Framework For Web Artisans

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).

Remote control tmux sessions for interactive CLIs (python, gdb, etc.) by sending keystrokes and scraping pane output.

Diagnóstico y solución de problemas de MCP servers en Claude Desktop. Usar cuando los servidores MCP muestran "Server disconnected", fallan al conectar, o tienen problemas de handshake. Cubre servidores Python (MySQL, SQL Server, PostgreSQL) y Node.js en Windows/macOS/Linux.

Agent Skill for TYPO3 DataHandler patterns. Use when working with TYPO3 database operations, record manipulation (create, update, copy, move, delete, localize), workspaces, versioning, staging, publishing, TCEmain hooks, cache clearing, or backend record processing. Essential for TYPO3 extension development.

Build AI agents with OpenAI Agents SDK + Model Context Protocol (MCP) for tool orchestration. Supports multi-provider backends (OpenAI, Gemini, Groq, OpenRouter) with MCPServerStdio. Use this skill for conversational AI features with external tool access via MCP protocol.

Generate Helmet.js security middleware configuration for Express applications. Triggers on "create helmet config", "generate helmet configuration", "express security headers", "helmet setup".

Create and manage database migrations following best practices for schema evolution and data integrity. When creating or modifying database migration files (migrations/*, *.migration.ts, migrate.ts). When working on schema changes, data migrations, or database version control. When implementing reversible migrations with up/down methods, managing indexes on large tables, or handling zero-downtime deployments. When writing migration scripts that alter database structure, add or remove tables, modify columns, or transform data.

Clean up test sessions - kill browsers, stop dev servers, free ports, and optionally remove test data. Use this BEFORE starting new tests or AFTER completing tests.