Claude Skills by mattnigh

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.

UX research and design toolkit for Senior UX Designer/Researcher including data-driven persona generation, journey mapping, usability testing frameworks, and research synthesis. Use for user research, persona creation, journey mapping, and design validation.

UI design system toolkit for Senior UI Designer including design token generation, component documentation, responsive design calculations, and developer handoff tools. Use for creating design systems, maintaining visual consistency, and facilitating design-dev collaboration.

CSS animations, transitions, and scroll-driven effects with accessibility (prefers-reduced-motion). Use when adding motion, hover effects, loading states, or scroll-based animations.

Implement secure authentication with JWT, sessions, OAuth, and password hashing. Use when adding login/logout, token auth, or integrating OAuth providers.

Write tests for backend services, APIs, and database access. Use when testing Express/Fastify handlers, services with database calls, or integration tests.

Build and deploy Docker containers for Node.js applications. Use when containerizing applications, optimizing Docker builds, or configuring container security.

Modern CSS organization with native @import, @layer cascade control, CSS nesting, design tokens, and element-focused selectors. AUTO-INVOKED when editing .css files.

Wrap third-party libraries for testability and replaceability. Use when integrating external APIs, creating testable code, or building swappable implementations.

Deploy web applications to Cloudflare Pages/Workers or DigitalOcean VPS. Use when configuring deployment, setting up production environments, or managing releases.

Implement environment variable management with .env files, validation, and environment-specific configs. Use when setting up configuration, handling secrets, or managing different deployment environments.

Handle errors consistently across frontend and backend. Use when implementing try/catch patterns, error boundaries, API error responses, or error reporting.

Enforce structured git workflow with conventional commits, feature branches, semver versioning, and work logging. Use for all code changes to prevent work loss and maintain history.

Write vanilla JavaScript for Web Components with functional core, imperative shell. Use when creating JavaScript files, building interactive components, or writing any client-side code.

Structured client-side logging and error reporting. Use when implementing console logging, error tracking, user session tracking, or analytics event patterns.

HTML metadata and head content. Use when writing or reviewing page head sections including SEO, social sharing, performance hints, and bot control.

Implement error tracking, performance monitoring, and user issue detection. Use when adding error handling, Web Vitals reporting, or debugging production issues.

Use Open Props CSS custom properties for consistent design tokens. Use when setting up design systems, choosing spacing/color values, or wanting battle-tested CSS variables without heavy dependencies.

Reusable HTML page patterns and component blocks. Use when building common page types like FAQs, product listings, press releases, or other structured content.

Write performance-friendly HTML pages. Use when optimizing page load, adding resources, configuring caching, or improving Core Web Vitals scores.

Generate SVG placeholder images for prototypes. Use when adding placeholder images for layouts, mockups, or development. Supports simple, labeled, and brand-aware types.

INVOKE FIRST before any code work. Validates git workflow (branch, issue, worklog) and checks approach. Use at START of every task and END before completing. Prevents skipped steps.

Write print-friendly CSS using @media print. Use when creating printable pages, invoices, receipts, articles, or any content users might print.

HTML-first development with CSS-only interactivity patterns. Use when building features that work without JavaScript, using native HTML elements, CSS pseudo-classes, and the View Transitions API.

Modern responsive image techniques using picture element, srcset, sizes, and modern formats. Use when adding images that need to adapt to different screen sizes, resolutions, or support modern image formats.

Write REST API endpoints with HTTP methods, status codes, versioning, and OpenAPI documentation. Use when creating API endpoints or implementing backend services.

Write secure web pages and applications. Use when handling user input, forms, external resources, authentication, or implementing security headers and CSP.

Service worker patterns for offline support, caching strategies, and PWA functionality. Use when implementing offline-first features, caching, or background sync.

Write TypeScript for Web Components and Node.js with strict typing. Use when adding types to JavaScript projects, building type-safe APIs, or creating generic utilities.

Write valid XHTML-strict HTML5 markup. Use when creating HTML files, editing markup, building web pages, or writing any HTML content. Ensures semantic structure and XHTML syntax.

Extract, review, and replace lines in JSONL dataset files for hand-crafted quality improvements. Use when improving synthetic training data, fixing thinking blocks, or manually editing dataset examples.

Use when investigating bugs, failures, leaks, crashes, or unexpected behavior. Activate when user describes something not working as expected, provides error messages or stack traces, mentions nightly test failures, or asks "why is this happening?" This skill shifts Claude into debugging mode with systematic investigation techniques.

Browser automation, debugging, and performance analysis using Puppeteer CLI scripts. Use for automating browsers, taking screenshots, analyzing performance, monitoring network traffic, web scraping, form automation, and JavaScript debugging.

Creates new Agent Skills for AI Agents following best practices and documentation. Use when the user wants prompts 'create a new skill ...' or 'use your meta skill to ...'.

Real-time stock synchronization for TSH Clients Console. Use when: (1) Debugging stock sync issues (webhooks not firing, stock not updating) (2) Understanding webhook event handling (3) Implementing stock-affecting features (4) Troubleshooting stock discrepancies between Zoho and app (5) Adding new stock-affecting transaction handlers (6) Monitoring stock sync health (7) Understanding the multi-layer sync architecture

AUTO-ACTIVATE on keywords (workflow, kanban, regras de negócio, transição, processo, estado, automação, patterns, agents, dashboard). Provides comprehensive knowledge and practical tools for developing the Kanban-Workflow system in VibeCForms v4.0. Covers workflow architecture, implementation phases, AI agents, pattern analysis, visual editors, business rules, auto-transitions, and analytics. Use when user mentions workflow-related concepts or business logic.

Descobre campos e estrutura de qualquer modelo do Odoo. Lista campos de tabela, busca campo por nome, inspeciona registro, faz consulta generica. Use quando: nao conhecer um modelo Odoo, precisar descobrir nome de campo, explorar estrutura de tabela, consulta em modelo nao mapeado.

Gera arquivos Excel, CSV ou JSON para download pelo usuario. Use quando o usuario pedir para exportar dados, criar planilha, gerar relatorio ou baixar informacoes. SEMPRE use esta skill em vez de Write para criar arquivos que o usuario precisa baixar.

Consulta e opera dados logisticos da Nacom Goya. Consulta pedidos, estoque, disponibilidade, lead time. Cria separacoes. Resolve entidades (pedido, produto, cliente, grupo). Use para perguntas como 'tem pedido do Atacadao?', 'quanto tem de palmito?', 'quando fica disponivel?', 'crie separacao do VCD123'.

Gerencia memoria persistente do usuario. Use para salvar/recuperar preferencias, fatos aprendidos e contexto entre sessoes. Exemplos: 'lembre que prefiro respostas diretas', 'o que voce sabe sobre mim?', 'esqueca minhas preferencias'.

Rastreia fluxos documentais completos no Odoo, executa auditorias financeiras e gerencia conciliacoes bancarias. USAR QUANDO: - Rastrear NF de compra/venda: "rastreie NF 12345", "fluxo da nota 54321" - Rastrear pedido de compra: "rastreie PO00789", "fluxo do pedido de compra" - Rastrear pedido de venda: "rastreie VCD123", "fluxo do VFB456" - Rastrear por parceiro: "documentos do Atacadao", "fluxo do fornecedor Vale Sul" - Rastrear por CNPJ: "rastreie 18467441000123" - Rastrear por chave NF-e...

Understand the already-done code, including best practices, linting, structure, patterns, etc, by reading it smartly, catching up the necessary context to implement features, or fix bugs.

Understand the already-done project folder structure, archtecture, file patterns, and similar, in order to apply better solutions and file organizations. Use when you need to understand the project archtecture, and file/folder patterns and conventions.

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.

Execute AI security CTF challenges across any competition platform with adaptable workflows for indirect prompt injection, jailbreaks, agent exploitation, and evidence collection with research-grounded techniques

Complete guide for Gray Swan MITM challenges across all waves. Includes AI agent profiling, defense bypass strategies, domain-specific handling, and platform troubleshooting. Use for ANY Gray Swan MITM challenge.

Guide AI assistants through Gray Swan MITM challenges using Playwright browser automation to interact with AI agent intermediaries. Use when working on Gray Swan Machine-in-the-Middle CTF challenges.

Updated Wave 3 MITM execution skill incorporating Nov 18 platform stability discoveries, domain-specific AI defenses, and WordPress container isolation. Use for Wave 3 challenges with realistic success rates and mitigation strategies.

Use this skill to create or update the root AGENTS.md file to register SynthesisFlow skills for AI agent discovery. Triggers include "register SynthesisFlow", "update AGENTS.md", "setup agent guide", or initializing a new project.

Use this skill to validate that Markdown files are in standard locations. Scans for .md files outside of predefined allowed directories and outputs warnings to prevent documentation sprawl. Triggers include "validate docs", "check markdown locations", or as part of quality checks.