Development

Build terminal UIs in Rust with Ratatui. Use when creating TUI applications, immediate-mode rendering, high-performance terminal interfaces, or production Rust CLIs.

Vue 3 - Progressive JavaScript framework with Composition API, reactivity system, single-file components, Vite integration, TypeScript support

Production-ready Supabase database schemas for customers, subscriptions, payments, invoices, and webhook events with comprehensive Row Level Security policies. Use when setting up payment infrastructure, creating subscription tables, implementing secure payment data storage, or configuring RLS policies for multi-tenant payment systems.

Standards enforced when writing code, creating pull requests, committing changes, or documenting features. CRITICAL - No emoji in developer-facing content (code/docs/PRs/issues/commits) or CLI output. Also defines standards for using cutting-edge language features and writing comprehensive documentation. Should be applied to all development work.

Diagnose and improve WPF performance for the widget host app: UI virtualization, async usage, rendering cost, memory leaks, and profiling workflow. Use when investigating slow startup, laggy UI, or high memory usage.

Guide for Next.js App Router dynamic routes and pathname parameters. Use when building pages that depend on URL segments (IDs, slugs, nested paths), accessing the `params` prop, or fetching resources by identifier. Helps avoid over-nesting by defaulting to the simplest route structure (e.g., `app/[id]` instead of `app/products/[id]` unless the URL calls for it).

Comprehensive NestJS framework skill for building scalable server-side applications. Use for TypeScript backend development with controllers, providers, modules, dependency injection, middleware, guards, interceptors, pipes, database integration (MikroORM + MongoDB), GraphQL, microservices, testing, and API documentation. Also triggers when working with NestJS TypeScript files (.ts), NestJS module files, nest-cli.json, or NestJS project structure. Example triggers: "Create NestJS controller", "Set up dependency injection", "Add middleware", "Create GraphQL resolver", "Build microservice", "Write NestJS test", "Set up database module"

UI/UX design intelligence. 50 styles, 21 palettes, 50 font pairings, 20 charts, 8 stacks (React, Next.js, Vue, Svelte, SwiftUI, React Native, Flutter, Tailwind). Actions: plan, build, create, design, implement, review, fix, improve, optimize, enhance, refactor, check UI/UX code. Projects: website, landing page, dashboard, admin panel, e-commerce, SaaS, portfolio, blog, mobile app, .html, .tsx, .vue, .svelte. Elements: button, modal, navbar, sidebar, card, table, form, chart. Styles: glassmorphism, claymorphism, minimalism, brutalism, neumorphism, bento grid, dark mode, responsive, skeuomorphism, flat design. Topics: color palette, accessibility, animation, layout, typography, font pairing, spacing, hover, shadow, gradient.

Guide for creating, validating, and managing Claude Code plugin marketplaces with schema validation tools

Guide for choosing between Server Components and Client Components in Next.js App Router. CRITICAL for useSearchParams (requires Suspense + 'use client'), navigation (Link, redirect, useRouter), cookies/headers access, and 'use client' directive. Activates when prompt mentions useSearchParams, Suspense, navigation, routing, Link component, redirect, pathname, searchParams, cookies, headers, async components, or 'use client'. Essential for avoiding mixing server/client APIs.

Modern React 19+ patterns with TypeScript

Blocks destructive git and filesystem commands before execution.Prevents accidental loss of uncommitted work from git checkout --,git reset --hard, rm -rf, and similar destructive operations.Works as a Claude Code PreToolUse hook with fail-open semantics.

Configure and manage Hammerspoon automation, window management, key remapping, and app launching. Use when working with ~/.config/hammerspoon config files, adding keybindings, implementing window layouts, or troubleshooting Hammerspoon functionality.

Instrumenting Go applications with OpenTelemetry for distributed tracing, Prometheus for metrics, and structured logging with slog. Covers auto-instrumentation, health checks, and graceful shutdown. Use when adding observability to microservices or debugging production issues.

Tag Zotero items with timestamp tags after generating bibliographies. Uses secure macOS Keychain storage for credentials. Claude Code only.

Analyze the Ark codebase by cloning the repository to a temporary location. Use this skill when the user asks questions about how Ark works, wants to understand Ark's implementation, or needs to examine Ark source code.

Write and update RSpec tests following BDD principles with behavior-first approach, characteristic-based context hierarchy, and happy path priority. **Activate when:** user mentions RSpec/specs/testing, works with *_spec.rb files, asks to write/add/update/fix tests, or requests test coverage. Ensures tests describe observable behavior, not implementation details.

Write self-documenting code with minimal, helpful comments that explain large sections of logic without cluttering the codebase. Use this skill when writing code comments, documenting complex logic, reviewing whether comments are needed, writing function documentation, explaining non-obvious code sections, ensuring code clarity through naming and structure, avoiding temporary or change-related comments, keeping comments evergreen and future-relevant, or deciding between adding comments versus refactoring for clarity. Apply this skill when writing or reviewing any code file to ensure comments add value without creating noise, and that code is primarily self-explanatory through clear naming and structure.

Tailwind CSS 4.1+ patterns. Use when styling components, responsive design, container queries, masks, shadows, or animations. (project)

Embed the chatbot UI inside Docusaurus and connect it to the FastAPI RAG backend. Use when building chat components, handling streaming responses, or integrating chat widgets into MDX pages.