72 Expert Skills

AI and machine learning development with PyTorch, TensorFlow, and LLM integration. Use when building ML models, training pipelines, fine-tuning LLMs, or implementing AI features.

Android development with Kotlin, Jetpack Compose, and modern Android architecture. Use when building Android apps, implementing Material Design, or following Android best practices.

REST and GraphQL API design best practices including OpenAPI specs. Use when designing APIs, documenting endpoints, or reviewing API architecture.

Professional audio production for music, podcasts, and sound design. Use when working with audio recording, mixing, mastering, or sound design for any medium.

Autonomous multi-agent coding with git worktree isolation, QA validation, and memory. Use for complex features requiring autonomous implementation.

Brand strategy and identity design for businesses and products. Use when creating brand guidelines, developing visual identity systems, or defining brand positioning.

Business strategy expertise for strategic planning, competitive analysis, market entry, M&A strategy, portfolio management, and strategic decision-making. Use when analyzing competitive positioning, planning growth strategies, or making strategic decisions.

This skill should be used when writing documentation for codebases, including README files, architecture documentation, code comments, and API documentation. Use this skill when users request help documenting their code, creating getting-started guides, explaining project structure, or making codebases more accessible to new developers. The skill provides templates, best practices, and structured approaches for creating clear, beginner-friendly documentation.

Detailed development workflow patterns, checklists, and standards. Auto-loads for complex tasks, planning, debugging, testing, or when explicit patterns are needed. Contains session protocols, git conventions, security checklists, testing strategy, and communication standards.

Data science and analytics expertise for statistical analysis, machine learning pipelines, data governance, business intelligence, predictive modeling, and analytics strategy. Use when building ML models, analyzing data, creating dashboards, or designing data architectures.

Advanced database design and administration for PostgreSQL, MongoDB, and Redis. Use when designing schemas, optimizing queries, managing database performance, or implementing data patterns.

Systematic 4-phase debugging methodology for complex, intermittent, or mysterious issues. Use when investigating bugs, race conditions, or unexplained failures.

DevOps, cloud infrastructure, and platform engineering. Use when working with AWS, GCP, Azure, Kubernetes, Terraform, CI/CD pipelines, or infrastructure as code.

Professional document creation, editing, and analysis for Office formats (docx, pdf, pptx, xlsx). Use when working with Word documents, PDFs, PowerPoint presentations, or Excel spreadsheets.

Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks

Desktop application development with Electron for Windows, macOS, and Linux. Use when building cross-platform desktop apps, implementing native OS features, or packaging web apps for desktop.

Financial analysis expertise for financial modeling (DCF, LBO, M&A), valuation, financial statement analysis, capital allocation, treasury management, and corporate finance decisions. Use when building financial models, analyzing statements, or making investment decisions.

Cross-platform development with Flutter and Dart for iOS, Android, Web, Desktop, and embedded. Use when building Flutter apps, implementing Material/Cupertino design, or optimizing Dart code.

This skill should be used when enhancing the visual design and aesthetics of web applications. It provides modern UI components, design patterns, color palettes, animations, and layout templates. REQUIRES ui-research skill first. Use this skill for tasks like improving styling, creating responsive designs, implementing modern UI patterns, adding animations, selecting color schemes, or building aesthetically pleasing frontend interfaces.

Game development with Unity, Unreal Engine, and Godot. Use when building games, implementing game mechanics, physics, AI, or working with game engines.

Review code for bugs, security vulnerabilities, performance issues, accessibility gaps, and CLAUDE.md workflow compliance. Supports any tech stack - HTML/CSS/JS, React, TypeScript, Node.js, Python, NestJS, Next.js, and more. Use when completing features, before commits, or reviewing pull requests.

Complete design system reference for any project - colors, typography, spacing, components, animations. Adapts to project theme and tech stack. Use when implementing UI, choosing colors, creating animations, or ensuring brand consistency. For new design systems, use ui-research skill first.

Guide feature development with architecture patterns for any tech stack. Covers frontend, backend, full-stack, and automation projects. Use when adding new features, modifying systems, or planning changes.

Review full-stack code for bugs, security vulnerabilities, performance issues, accessibility gaps, and CLAUDE.md compliance. Enforces TypeScript strict mode, input validation, GPU-accelerated animations, and design system consistency. Use when completing features, before commits, or reviewing pull requests.

Complete design system reference for full-stack applications. Covers colors, typography, spacing, component patterns (shadcn/ui), effects, GPU-accelerated animations, and WCAG AA accessibility. Use when implementing UI, choosing colors, applying spacing, creating components, or ensuring brand consistency.

Guide feature development for full-stack applications with architecture focus. Covers Next.js App Router patterns, NestJS backend services, database models, data workflows, and seamless integration. Use when adding new features, refactoring existing code, or planning major changes.

Professional UI/UX design expertise for full-stack applications. Covers design thinking, user psychology (Hick's/Fitts's/Jakob's Law), visual hierarchy, interaction patterns, accessibility, performance-driven design, and design critique. Use when designing features, improving UX, solving user problems, or conducting design reviews.

Review React/TypeScript code for bugs, security vulnerabilities, performance issues, accessibility gaps, and CLAUDE.md workflow compliance. Enforces TypeScript strict mode, GPU-accelerated animations, WCAG AA accessibility, bundle size limits, and surgical simplicity. Use when completing features, before commits, or reviewing pull requests.

Complete design system reference for React applications. Covers colors, typography, spacing, component patterns, glassmorphism effects, GPU-accelerated animations, and WCAG AA accessibility. Use when implementing UI, choosing colors, applying spacing, creating components, or ensuring brand consistency.

Guide feature development for React applications with architecture focus. Covers Zustand/Redux patterns, IndexedDB usage, component systems, lazy loading strategies, and seamless integration. Use when adding new features, refactoring existing code, or planning major changes.

Professional UI/UX design expertise for React applications. Covers design thinking, user psychology (Hick's/Fitts's/Jakob's Law), visual hierarchy, interaction patterns, accessibility, performance-driven design, and design critique. Use when designing features, improving UX, solving user problems, or conducting design reviews.

Review static site code for bugs, security issues, performance problems, accessibility gaps, and CLAUDE.md compliance. Enforces pure HTML/CSS/JS standards, minimal page weight, mobile-first design. Use when completing features, before commits, or reviewing changes.

Complete design system reference for static HTML/CSS/JS sites. Covers colors, typography, component patterns, animations, and accessibility. Use when implementing UI, choosing colors, or ensuring brand consistency.

Guide feature development for static HTML/CSS/JS sites. Covers patterns, automation workflows, and content validation. Use when adding features, modifying automation, or planning changes.

Professional UI/UX design expertise for static HTML/CSS/JS sites. Covers design thinking, user psychology, visual hierarchy, minimalist interaction patterns, accessibility, and performance-driven design. Use when designing features, improving UX, or conducting design reviews.

Professional UX expertise for any project type. Covers user research, design thinking, interaction patterns, accessibility, and design critique. Use when designing new features, improving UX, conducting design reviews, or evaluating user flows. For visual UI work, combine with ui-research skill.

Professional graphic design principles for digital and print media. Use when creating visual designs, choosing color palettes, typography, layouts, or providing design feedback.

GraphQL API design and implementation. Use when building GraphQL APIs, designing schemas, implementing resolvers, or optimizing GraphQL performance.

Workplace health and wellness expertise for employee wellness programs, mental health initiatives, ergonomics and safety, healthcare benefits strategy, and health analytics. Use when designing wellness programs, improving workplace safety, or analyzing health metrics.

HR and talent management expertise for talent acquisition, performance management, compensation strategy, organizational design, culture building, succession planning, and D&I programs. Use when hiring, managing performance, designing organizations, or building culture.

Internationalization and localization for global applications. Use when adding multi-language support, handling regional formats, or preparing apps for global markets.

Innovation management expertise for innovation frameworks (Design Thinking, Stage-Gate), ideation processes, innovation portfolio management, venture capital, open innovation, and IP strategy. Use when driving innovation, managing R&D portfolios, or building innovation programs.

iOS, iPadOS, and tvOS development with Swift, SwiftUI, and UIKit. Use when building Apple platform apps, implementing iOS-specific features, or following Apple Human Interface Guidelines.

Executive leadership expertise for decision-making, change management, crisis management, stakeholder management, team building, and organizational leadership. Use when leading teams, managing change, navigating crises, or developing leadership skills.

Legal and compliance expertise for corporate governance, contract analysis, regulatory compliance (SOX, GDPR, HIPAA), risk assessment, intellectual property, and litigation management. Use when reviewing contracts, ensuring compliance, or managing legal risk.

Native macOS development with AppKit, Catalyst, and macOS-specific APIs. Use when building Mac-native apps, menu bar apps, system extensions, or macOS-specific features.

Marketing strategy expertise for brand strategy, market research, customer segmentation, digital marketing, content strategy, marketing analytics, campaign management, and PR/communications. Use when planning campaigns, analyzing brand health, building personas, or optimizing marketing performance.

Microservices architecture patterns and best practices. Use when designing distributed systems, breaking down monoliths, or implementing service communication.

Revenue models, pricing strategies, and business monetization. Use when designing pricing, choosing business models, or optimizing revenue for products and services.

Operations excellence expertise for supply chain optimization, process improvement (Lean, Six Sigma), capacity planning, vendor management, quality assurance, and operational efficiency. Use when optimizing processes, managing supply chains, or improving operational performance.

Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.

Presentation creation, editing, and analysis. When Claude needs to work with presentations (.pptx files) for: (1) Creating new presentations, (2) Modifying or editing content, (3) Working with layouts, (4) Adding comments or speaker notes, or any other presentation tasks

Product management expertise for product strategy, roadmap planning, feature prioritization (RICE, ICE, MoSCoW), customer research, A/B testing, product analytics, and product-market fit. Use when building product roadmaps, prioritizing features, or defining product strategy.

Progressive Web App development for installable, offline-capable web applications. Use when building PWAs, implementing service workers, or creating offline-first experiences.

R&D management expertise for R&D portfolio management, technology roadmapping, research methodology, patent strategy, lab management, academic partnerships, and regulatory pathways. Use when managing research programs, planning technology roadmaps, or building patent portfolios.

Cross-platform mobile development with React Native and Expo. Use when building iOS/Android apps with JavaScript/TypeScript, implementing native features, or optimizing mobile performance.

Enterprise risk management expertise for ERM frameworks, risk assessment, business continuity, insurance strategy, third-party risk, and reputational risk. Use when assessing risks, building continuity plans, or managing organizational risk exposure.

Sales strategy expertise for sales methodologies (MEDDIC, SPIN, Challenger), sales forecasting, account management, pipeline management, sales enablement, and revenue operations. Use when building sales processes, qualifying deals, managing pipelines, or improving close rates.

Information security expertise for cybersecurity frameworks (NIST, ISO 27001), security architecture, incident response, vulnerability management, identity management, and cloud security. Use when designing security programs, responding to incidents, or assessing vulnerabilities.

Use this skill when auditing SEO, analyzing Core Web Vitals, verifying meta tags, checking structured data, or troubleshooting analytics implementations. Covers Google Search Console, Google Analytics 4, Cloudflare Web Analytics, and technical SEO best practices.

Complete startup launch guidance from idea validation to market entry. Use when planning a new business, validating product ideas, or preparing for launch.

Sustainability and ESG expertise for ESG strategy, carbon footprint management, sustainable supply chains, circular economy, renewable energy, climate risk, and ESG reporting (GRI, SASB, TCFD). Use when building sustainability programs, measuring carbon impact, or creating ESG reports.

Svelte 5 development with runes ($state, $derived, $effect), SvelteKit full-stack framework, and modern reactive patterns. Use when building Svelte applications, implementing fine-grained reactivity, or working with SvelteKit routing and server functions.

Test-Driven Development workflow enforcement with RED-GREEN-REFACTOR cycle. Use when implementing features test-first or improving test coverage.

This skill should be used when analyzing technical debt in a codebase, documenting code quality issues, creating technical debt registers, or assessing code maintainability. Use this for identifying code smells, architectural issues, dependency problems, missing documentation, security vulnerabilities, and creating comprehensive technical debt documentation.

This skill should be used when writing test cases, fixing bugs, analyzing code for potential issues, or improving test coverage for JavaScript/TypeScript applications. Use this for unit tests, integration tests, end-to-end tests, debugging runtime errors, logic bugs, performance issues, security vulnerabilities, and systematic code analysis.

Motion design and animation for user interfaces. Use when creating micro-interactions, page transitions, loading states, or any UI animation across web and mobile platforms.

Research-first UI/UX design workflow. Use BEFORE any frontend visual work to research modern patterns, gather inspiration from real products, and avoid generic AI-generated looks. Mandatory prerequisite for quality UI work.

Professional video production from planning to delivery. Use when creating video content, editing workflows, motion graphics, or optimizing video for different platforms.

Vue.js 3 development with Composition API, TypeScript, Pinia state management, and Nuxt 3 full-stack. Use when building Vue applications, implementing reactive patterns, creating composables, or working with the Vue ecosystem.

Real-time communication with WebSockets, Server-Sent Events, and related technologies. Use when building chat, live updates, collaborative features, or any real-time functionality.

Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas