DevOps

Download videos, audio, playlists, and channels from YouTube and 1000+ websites using yt-dlp. Supports quality selection, format conversion, subtitle download, playlist filtering, metadata extraction, thumbnail download, and batch operations. Use when downloading YouTube videos in any quality (4K, 8K, HDR), extracting audio as MP3/M4A/FLAC, downloading entire playlists/channels, getting subtitles in multiple languages, converting to specific formats, downloading live streams, archiving content, or batch processing multiple URLs. Optimized for reliability with automatic retries, rate limiting, and error handling.

Guide for advanced Next.js App Router patterns including Route Handlers, Parallel Routes, Intercepting Routes, Server Actions, error boundaries, draft mode, and streaming with Suspense. CRITICAL for server actions (action.ts, actions.ts files, 'use server' directive), setting cookies from client components, and form handling. Use when requirements involve server actions, form submissions, cookies, mutations, API routes, `route.ts`, parallel routes, intercepting routes, or streaming. Essential for separating server actions from client components.

Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.

Use when performing mathematical physics computations - Lie algebras, quantum chemistry, neural operators, theorem proving, or scientific validation. Provides guidance on Theory2 CLI usage, computational workflows, and verification methodology.

Expert MCP (Model Context Protocol) orchestration with n8n workflow automation. Master bidirectional MCP integration, expose n8n workflows as AI agent tools, consume MCP servers in workflows, build agentic systems, orchestrate multi-agent workflows, and create production-ready AI-powered automation pipelines with Claude Code integration.

Choose and execute orchestration commands (/solo for straightforward tasks, /spec for planning, /conduct for complex features with SPEC.md). Covers decision tree, sub-agents, validation standards, and best practices. Use when planning complex tasks or understanding orchestration patterns.

GitHub/Railway housekeeping for CI env/secret management and DX maintenance.Use when setting or auditing GitHub Actions variables/secrets, syncing Railway env → GitHub, or fixing CI failures due to missing env.

Automate Git worktree creation with isolated Docker services and browser automation for parallel Claude Code development sessions. This skill should be used when creating, managing, or removing Git worktrees for isolated development environments with automatic port allocation, environment file copying, and browser MCP isolation.

Configuring Claude Code Hooks System. Design, implement, and manage PreToolUse/PostToolUse/SessionStart/Notification/Stop hooks. Use when enforcing safety checks, auto-formatting, running linters, or triggering automated workflows based on development events.

Load when working on data pipelines, datasets, reproducibility, or datainfrastructure topics. Contains best practices for data engineering,ETL/ELT patterns, and ensuring reproducible data workflows.

Use when planning animation workflows, deciding between spontaneous vs controlled approaches, or balancing creative freedom with structural precision.

Comprehensive testing strategy covering test pyramids, framework selection, coverage standards, test organization, mocking patterns, and CI/CD integration. Activate when planning testing approaches, setting quality gates, or establishing test standards.

Agent-to-Agent (A2A) server configuration patterns for HTTP, STDIO, SSE, and WebSocket transports. Use when building A2A servers, configuring MCP transports, setting up server endpoints, or when user mentions A2A configuration, server transport, MCP server setup, or agent communication protocols.

WHEN: Security scan, vulnerability detection, XSS/CSRF analysis, secret exposure, OWASP Top 10WHAT: XSS/injection detection + hardcoded secrets + auth/authz issues + severity-based vulnerability listWHEN NOT: Performance → perf-analyzer, Cloud security → cloud-security-expert

Use when working with Ruby blocks, procs, lambdas, and functional programming patterns including closures and higher-order functions.

Align to subject-specific national standards including NGSS, Common Core, C3, NCTM, ACTFL, SHAPE, ISTE, and arts standards. Generate detailed standards alignment with codes. Use for national standards alignment. Activates on "NGSS", "Common Core", "national standards", or "NCTM".

Development: Cleanup and maintenance for the development environment.Removes build artifacts, caches, containers, and recovers disk space.Run from repository root with 'just clean'. Use when developers needto free disk space or reset the build environment.

Design, optimize, and refactor AI agent systems based on Anthropic best practices and latest research. Guides you through architectural decisions with interactive questionnaire, loads current documentation, and launches specialized agent-architect for detailed analysis.

Deployment protection with environment protection rules, required reviewers, wait timers, and approval gates for production deployments.

Benchmark HBF performance using Apache Bench (ab). Measures static asset serving, versioned filesystem operations, and QuickJS runtime routes. Maintains historical data for performance tracking over time.