> browse/registry

> screenshot-optimization

When the user wants to design, optimize, or evaluate App Store screenshots and preview videos. Also use when the user mentions "screenshots", "app preview", "product page design", "screenshot design", "creative assets", or "what should my screenshots show". For A/B testing screenshots, see ab-test-store-listing. For full ASO audit, see aso-audit.

> common-system-design

Universal architectural standards for robust, scalable systems. Use when designing new features, evaluating architecture, or resolving scalability concerns. (triggers: architecture, design, system, scalability)

> managing-database-replication

This skill enables Claude to manage database replication, failover, and high availability configurations using the database-replication-manager plugin. It is designed to assist with tasks such as setting up master-slave replication, configuring automatic failover, monitoring replication lag, and implementing read scaling. Use this skill when the user requests help with "database replication", "failover configuration", "high availability", "replication lag", or "read scaling" for databases like P

> react-native-dls

Enforce design token usage in React Native. Use when enforcing a design system, preventing hardcoded styles, or implementing theme tokens in React Native. (triggers: **/*Screen.tsx, **/*Component.tsx, **/theme/**, **/styles/**, StyleSheet, styled-components, theme, colors, spacing)

> react-native-styling

StyleSheet API, Flexbox, theming, and responsive design. Use when implementing React Native styles, theming, Flexbox layouts, or responsive design. (triggers: **/*.tsx, **/*.ts, StyleSheet, style, theme, responsive, flexbox)

> running-load-tests

This skill enables Claude to create and execute load tests for performance validation. It is designed to generate load test scripts using tools like k6, JMeter, and Artillery, based on specified test scenarios. Use this skill when the user requests to create a "load test", conduct "performance testing", validate "application performance", or needs a "stress test" to identify breaking points in the application. The skill helps define performance thresholds and provides execution instructions.

> security-threat-model

Repository-grounded threat modeling that enumerates trust boundaries, assets, attacker capabilities, abuse paths, and mitigations, and writes a concise Markdown threat model. Use when the user asks to threat model a codebase or path, enumerate threats or abuse paths, or perform AppSec threat modeling. Do NOT use for general architecture summaries, code review, security best practices (use security-best-practices), or non-security design work.

Design professional PowerPoint slides with layouts, speaker notes, animations, and templates. Use when creating pitch decks, business presentations, training materials, or any slide-based content.

> optimizing-cache-performance

This skill enables Claude to analyze and improve application caching strategies. It optimizes cache hit rates, TTL configurations, cache key design, and invalidation strategies. Use this skill when the user requests to "optimize cache performance", "improve caching strategy", "analyze cache hit rate", or needs assistance with "cache key design", "TTL optimization", or "cache invalidation". The skill identifies potential bottlenecks and recommends adjustments for improved performance and efficien

Design patterns for event-driven systems: event sourcing, CQRS, sagas, and message-based microservices.

Set up CRM systems, manage sales pipelines, create lead scoring models, and design follow-up sequences. Use when organizing sales processes, tracking deals, or building customer relationship workflows.

> java-best-practices

Core engineering principles inspired by Effective Java and Clean Code. Use when applying Effective Java patterns, SOLID principles, or clean code practices in Java. (triggers: **/*.java, refactor, clean code, smells, patterns, design)

Create newsletter templates, write compelling subject lines, set up A/B tests, and design automation sequences. Use when building email campaigns, growing a mailing list, or improving email engagement.

> nestjs-architecture

Standards for scalable, modular NestJS backend architecture. Use when designing module boundaries, feature modules, or scalable NestJS architecture. (triggers: **/*.module.ts, main.ts, NestFactory, Module, Controller, Injectable)

> vercel-composition-patterns

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture. Includes React 19 API changes.

> brand-guidelines

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.

> esm

Comprehensive toolkit for protein language models including ESM3 (generative multimodal protein design across sequence, structure, and function) and ESM C (efficient protein embeddings and representations). Use this skill when working with protein sequences, structures, or function prediction; designing novel proteins; generating protein embeddings; performing inverse folding; or conducting protein engineering tasks. Supports both local model usage and cloud-based Forge API for scalable inferenc

Audit Node.js applications for security vulnerabilities. Use when reviewing npm dependencies, checking for injection attacks, securing Express/Fastify APIs, implementing auth, preventing prototype pollution, or hardening Node.js deployments.

> accessibility-compliance-accessibility-audit

You are an accessibility expert specializing in WCAG compliance, inclusive design, and assistive technology compatibility. Conduct audits, identify barriers, and provide remediation guidance.

> ui-visual-validator

Rigorous visual validation expert specializing in UI testing, design system compliance, and accessibility verification. Masters screenshot analysis, visual regression testing, and component validation. Use PROACTIVELY to verify UI modifications have achieved their intended goals through comprehensive visual analysis.