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.
Parallel test execution with Selenium Grid including hub/node configuration, Docker-based grid, cross-browser testing, and session management.
End-to-end web testing skill using Selenium WebDriver with Java, covering WebDriver setup, page objects, explicit waits, and TestNG/JUnit integration.
Port a Java Selenium suite to Playwright TypeScript - locator mapping, WebDriverWait to auto-wait, Grid to workers, Page Object port, with before/after code and a phased checklist.
Teach agents a disciplined strategy for resilient and self-healing locators with role-first selectors, repair evidence, code review, and clear no-heal rules.
Static application security testing using Semgrep for finding vulnerabilities, code smells, and enforcing security policies across codebases.
Integration testing with Sentry for error tracking, performance monitoring, and release health verification in production environments.
Java BDD testing with Serenity BDD framework using the Screenplay pattern, Cucumber integration, step libraries, comprehensive reporting, and living documentation generation.
Testing serverless functions including Lambda, Cloud Functions, and Edge Functions with local emulation, cold start testing, and timeout handling.
Teach agents to run session-based exploratory testing with charters, time boxes, tours, note-taking, debriefs, and coverage tracking.
Testing skill for shadcn/ui and Radix UI component libraries covering accessible component testing, dialog and popover testing, form validation testing, data table testing, command palette testing, and theme switching verification.
Testing Service Level Agreements and Objectives including availability targets, latency percentiles, error budgets, and automated SLO compliance reporting.
Building effective smoke test suites for deployment verification including critical path coverage, health endpoints, and rapid feedback testing.
Snapshot testing strategies for UI components, API responses, and data structures with update workflows, review patterns, and anti-pattern avoidance.
SOAP web service testing including WSDL validation, XML schema testing, WS-Security, and SOAP fault handling verification.
Testing SOC 2 compliance controls including security monitoring, change management, access reviews, and incident response procedures.
Testing implementations against formal specifications including RFC compliance, protocol adherence, and standards conformance verification.
C# .NET BDD testing with SpecFlow using Gherkin feature files, step bindings, hooks, dependency injection, Selenium integration, and living documentation with SpecFlow+ LivingDoc.
Spring Boot application testing with @SpringBootTest, MockMvc, @DataJpaTest, Testcontainers, and Spring Security testing patterns.
Comprehensive SQL injection testing patterns including blind SQLi, time-based, union-based, and parameterized query validation techniques.
Testing Server-Sent Events implementations including event stream validation, reconnection behavior, event ID tracking, and EventSource client testing.
SSL/TLS configuration testing including certificate validation, cipher suite analysis, protocol version checks, and HSTS verification.
Identify stale cache issues across browser cache, CDN layers, API response caching, and application-level caches that cause users to see outdated content
Generate comprehensive test cases from state machine models covering all states, transitions, guard conditions, and invalid transition attempts for workflow-heavy features
Writing custom static analysis rules for ESLint, Semgrep, and SonarQube to enforce project-specific code quality and security standards.
Testing UI components through Storybook stories with play functions, interaction testing, accessibility checks, and visual regression via Chromatic.
Streaming API testing skill covering Server-Sent Events testing, chunked transfer encoding, gRPC streaming, real-time data validation, backpressure testing, connection resilience, and AI/LLM streaming response testing.
Stress testing methodologies for finding breaking points, resource exhaustion thresholds, and degradation patterns under extreme load conditions.
Testing patterns for Supabase applications covering auth flow testing, Row Level Security policy testing, realtime subscription testing, and edge function testing
Test Node.js HTTP APIs in-process with SuperTest — request(app) without binding a port, chained .expect assertions, auth headers, JSON body validation, and Jest integration with proper async/await patterns.
Svelte component testing with @testing-library/svelte, vitest, component rendering, event simulation, store testing, and SvelteKit testing.
Swift testing with XCTest, Swift Testing framework, async/await testing, SwiftUI preview testing, and performance measurement.
Synthetic monitoring test creation for uptime checking, user journey simulation, API health verification, and multi-region availability testing.
Testing patterns for TanStack Query (React Query) covering query hook testing, mutation testing, cache behavior testing, and optimistic update verification.
Practice strict red-green-refactor test-driven development — write one failing test first, make it pass with the minimum code, then refactor under green, with worked cycles in Jest and pytest, AAA structure, and behavior-based test naming.
Test-Driven Development mastery with red-green-refactor cycle, outside-in TDD, test-first design, and incremental development patterns.
Infrastructure-as-Code testing with Terratest, terraform validate, plan verification, and drift detection for Terraform configurations.
Designing scalable test architectures including test pyramid, diamond, trophy, and honeycomb patterns with framework-agnostic implementation.
Automatically generate comprehensive test cases from user stories and acceptance criteria using BDD patterns, equivalence partitioning, and risk-based prioritization
Identify untested code paths, uncovered branches, and missing test scenarios using coverage analysis, risk mapping, and change-based coverage tracking
Optimizing test coverage beyond line coverage including branch coverage, mutation score, path coverage, and identifying meaningful coverage gaps.
Anonymizing production data for testing while maintaining referential integrity, data distributions, and edge case representation.
Build reusable test data factories with realistic fake data generation, relationship handling, and deterministic seeding for reproducible tests.
Test data generation and management skill covering Faker.js, factory patterns, builders, database seeding, and test data strategies for reliable test suites.
Quantify and prioritize test technical debt by analyzing coverage gaps, flaky test ratios, outdated assertions, and missing test categories across codebases.
Generating human-readable test documentation from test code including test catalogs, coverage reports, and living documentation websites.
Comprehensive guide to test doubles including mocks, stubs, spies, fakes, and dummies with when-to-use guidelines and anti-pattern avoidance.
Master the Test-Driven Development approach with Red-Green-Refactor cycles, writing tests before code, comprehensive coverage patterns, and quality code practices for building robust, maintainable software.
Managing test environments including provisioning, configuration, data seeding, isolation, cleanup, and environment-as-code patterns.
Test fixture design patterns including builders, factories, object mothers, and fixture management for maintainable test data setup.
Detecting and diagnosing flaky tests using statistical analysis, execution recording, environmental factor isolation, and quarantine strategies.
Building hermetic tests that are fully isolated from external dependencies using fakes, containers, and deterministic time/random sources.
Analyzing code changes to determine which tests are impacted, enabling selective test execution and faster CI feedback loops.
Test isolation techniques including database cleanup, transaction rollback, parallel test execution, and shared resource management.
Define and build QA metrics that drive decisions, escape rate, flake rate, coverage of risk, MTTR for test failures, release readiness scorecards, anti-gaming rules, and dashboard layouts with SQL and query examples.
Test framework migration skill covering strategies for migrating between testing frameworks including Selenium to Playwright, Jest to Vitest, Enzyme to React Testing Library, and Protractor to Cypress with automated codemods and incremental migration patterns.
Implementing test observability with execution analytics, failure trend analysis, coverage gap detection, and test suite health dashboards.
Data-driven testing with parameterized tests, test matrices, combinatorial testing, and pairwise parameter generation techniques.
Test plan generation skill covering requirements analysis, test strategy, coverage matrices, risk-based testing, and test estimation techniques.
Building test reporting dashboards with real-time execution metrics, trend analysis, flaky test detection, coverage visualization, and integration with Allure, ReportPortal, and custom dashboards using Grafana and Prometheus.
Comprehensive test strategy design methodology covering risk-based testing, test pyramid optimization, coverage planning, environment strategy, data management, and test automation ROI analysis for enterprise and startup contexts.
Claude Skills — questions
Answers built from the skills we actually parsed.