Claude Skills
The open format is called Agent Skills and works in Claude Code, Codex, Cursor and other agents — most people know it as Claude Skills.
Every Agent Skill we could find on GitHub, deduplicated by content. 80 149 files from 1 774 authors, of which 62 489 are unique — the rest is the same skill repackaged into someone else's repository. For each one: what it weighs in tokens, whether it ships runnable scripts, and which MCP servers it needs.
Advanced security analysis using GitHub CodeQL to find zero-day vulnerabilities, injection flaws, and security anti-patterns in source code.
Automated compliance testing using Open Policy Agent, Chef InSpec, and custom policy engines for security baseline validation.
Isolating and testing individual UI components with dependency mocking, state injection, and visual snapshot verification.
Testing application configurations including environment variable validation, feature flag combinations, config file parsing, and default value verification.
Testing concurrent code including race condition detection, deadlock prevention, thread safety verification, and parallel execution correctness.
Contract testing for GraphQL APIs including schema breaking change detection, query compatibility testing, and federated schema validation.
Systematically detect, capture, and categorize browser console errors, warnings, and unhandled exceptions during automated test execution
Generate consumer-driven contract tests using Pact framework to verify API provider-consumer compatibility and prevent integration breaking changes
Contract-first testing approach using Pact, Spring Cloud Contract, or Dredd for ensuring API consumer-provider compatibility.
Consumer-driven contract testing skill using Pact, covering consumer tests, provider verification, Pact Broker integration, and CI/CD workflows.
Effective patterns for using GitHub Copilot to generate, refactor, and maintain test code including prompt engineering for test generation, Copilot Chat for debugging, inline suggestions for assertions, and workspace context optimization.
Testing scheduled tasks and cron jobs including execution timing, idempotency, failure recovery, overlap prevention, and timezone handling.
Testing cookie and session management including secure flags, SameSite policy, session fixation, timeout behavior, and cross-domain cookie handling.
Testing Cross-Origin Resource Sharing configurations for misconfigurations, overly permissive policies, and credential handling vulnerabilities.
Content Security Policy testing and validation to prevent XSS attacks, data injection, and clickjacking through proper CSP header configuration.
Author effective Cursor rules in .cursor/rules/*.mdc - YAML frontmatter (description, globs, alwaysApply), the four rule types, scoped QA rules, subagents, and structure that actually steers the model.
Automated cross-browser testing across Chrome, Firefox, Safari, and Edge with visual comparison, feature detection, and polyfill verification.
Effective test automation patterns with Cursor AI IDE including Composer for test suite generation, Cmd+K for inline test edits, Chat for test debugging, codebase-aware test generation, and rules configuration for testing conventions.
Component testing patterns with Cypress v14 including React, Vue, and Angular component mounting, custom mount commands, interaction testing, visual snapshots, and integration with Vite and Webpack bundlers.
Component testing with Cypress including mount API, React/Vue/Angular component testing, stub patterns, and visual snapshot testing.
End-to-end testing skill using Cypress for web applications, covering custom commands, network intercepts, fixtures, cy.session, and component testing patterns.
Detect dark mode rendering issues including contrast failures, missing theme tokens, image inversions, and transition glitches across components.
Verifying data integrity constraints, referential integrity, data type validation, and consistency checks across database operations.
Systematic dark mode testing covering color contrast, theme switching, persistence, media query respect, component-level theming, and image adaptation.
Testing data pipelines including ETL validation, data quality checks, pipeline orchestration testing, and data lineage verification.
Generate tests for database migration safety covering schema changes, data integrity preservation, rollback verification, and zero-downtime migration validation
Automated detection and reporting of broken links, missing resources, and orphaned pages across web applications using crawl-based and DOM-based strategies
Advanced debugging patterns for test failures covering root cause analysis, flakiness investigation, performance debugging, and systematic troubleshooting methodologies.
Database performance testing including query optimization, index analysis, connection pooling, slow query detection, and N+1 query prevention.
Automated scanning of project dependencies for known vulnerabilities using tools like npm audit, Snyk, and Dependabot patterns.
Testing database migration scripts for correctness, rollback safety, data integrity, and zero-downtime migration patterns.
Test LLM applications with DeepEval, pytest-style unit tests for LLM outputs using G-Eval, answer relevancy, faithfulness, hallucination and custom metrics, with CI quality gates and dataset-driven regression runs.
Testing desktop applications built with Electron, Tauri, or native frameworks including window management, IPC, tray icons, and auto-update testing.
Gray-box end-to-end testing for React Native apps with Detox. Covers .detoxrc.js configuration, build and test commands, matchers, device.launchApp control, automatic synchronization, and macOS CI pipelines.
Testing distributed tracing implementations including context propagation, span correlation, baggage handling, and trace sampling verification.
Testing patterns for autonomous AI coding agents like Devin and SWE-Agent including task verification, output validation, sandboxed execution, regression testing for agent behavior, and safety guardrails for autonomous code generation.
DNS configuration testing including record validation, DNSSEC verification, resolution timing, failover testing, and DNS-based service discovery.
Django application testing with TestCase, fixtures, factory_boy, model testing, view testing, middleware testing, and Django REST framework testing.
Integration testing with real dependencies in throwaway Docker containers using the Testcontainers Node.js API - GenericContainer, exposed ports, wait strategies, module containers, Docker Compose environments, and reliable cleanup.
Testing Docker containers and images including Dockerfile linting, container structure tests, security scanning, and multi-stage build validation.
End-to-end testing for React Native apps using Detox with gray-box testing, synchronization, device simulation, and CI integration.
.NET testing with xUnit, NUnit, MSTest, FluentAssertions, Moq, integration testing with WebApplicationFactory, and Entity Framework testing.
Testing patterns for Drizzle ORM covering migration testing, query builder testing, transaction testing, and database integration testing with PostgreSQL, SQLite, and MySQL.
Elasticsearch testing including index management, query validation, mapping verification, bulk operation testing, and search relevance scoring.
Make Claude Code write and maintain end-to-end tests like a senior SDET — Playwright and Cypress flows with stable locators, the Page Object Model, fixtures, reused auth state, network mocking, and flake-free CI. Claude Code E2E testing, done right.
Comprehensive end-to-end testing methodologies and best practices covering architecture, test design, data management, flakiness prevention, and cross-browser strategies.
Email delivery testing including content verification, rendering across clients, spam score checking, link validation, and transactional email workflow testing.
Testing edge computing deployments including latency verification, edge function testing, CDN worker testing, and geo-distributed test execution.
Audit empty states across web applications ensuring proper messaging, helpful CTAs, illustration rendering, and graceful handling when data is unavailable
End-to-end database testing with test containers, data seeding, cleanup strategies, transaction isolation, and production data anonymization.
Testing in ephemeral preview environments for pull requests including environment provisioning, data seeding, and automated teardown.
Enforce test quality with ESLint - eslint-plugin-jest, eslint-plugin-playwright, and eslint-plugin-testing-library rules in flat config, blocking focused tests, missing assertions, and flaky waits via a CI lint gate.
Validate error boundary implementations in React and other frameworks ensuring graceful degradation, proper fallback UI rendering, and error recovery flows
Audit error messages across an application for clarity, actionability, consistency, and user-friendliness by cataloging and grading every error surface.
Android UI testing with Espresso framework including view matchers, actions, assertions, idling resources, and RecyclerView testing patterns.
Testing error handling paths including exception propagation, error boundaries, retry logic, circuit breakers, and graceful degradation.
Testing event sourcing patterns including event store validation, projection testing, saga orchestration, and event versioning compatibility.
Generate structured exploratory testing charters with focused missions, time-boxed sessions, risk-based areas, and standardized note-taking templates for systematic exploration
Express.js API testing with supertest, middleware testing, route handler testing, error handling verification, and authentication testing.
Generating realistic test data with Faker libraries for names, addresses, emails, dates, and domain-specific data with reproducible seed control.
Claude Skills — questions
Answers built from the skills we actually parsed.