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.
Systematic patterns for prompting AI coding agents to generate high-quality tests including prompt engineering for test creation, coverage-driven generation, mutation-aware testing, and review checklists for AI-generated test code.
AI-powered test orchestration skill covering intelligent test selection, risk-based test prioritization, flaky test management, test impact analysis, parallel execution optimization, and predictive test failure detection using machine learning.
Test LLM, RAG, MCP, and agentic systems end to end. Build golden datasets, run deterministic checks and LLM judges, score retrieval, probe prompt injection, verify tool use, and gate CI on thresholds. Orchestrates DeepEval, Ragas, promptfoo, and Langfuse.
Advanced Allure test reporting with custom categories, environment info, test history trends, flaky test detection, and CI/CD dashboard integration.
Angular application testing with TestBed, component harness, service testing, directive testing, and Angular-specific testing utilities.
Simulate aggressive user behavior patterns including rapid clicking, random navigation, form abuse, tab spamming, and unexpected interaction sequences to find UI resilience issues
API endpoint fuzzing for discovering unexpected behaviors, crashes, and security vulnerabilities through malformed requests, boundary values, and protocol violations.
Testing API rate limiting implementations including throttling behavior, burst handling, rate limit headers, and distributed rate limiting patterns.
API gateway testing skill covering rate limiting validation, request routing, authentication proxy testing, load balancing verification, circuit breaker testing, and gateway configuration validation for Kong, Envoy, and AWS API Gateway.
Automated detection of breaking API changes including response format changes, removed endpoints, type changes, and deprecation enforcement.
Comprehensive API security testing based on OWASP API Security Top 10 including broken authentication, injection attacks, rate limiting, BOLA/BFLA vulnerabilities, and automated security scanning with ZAP and custom scripts.
Validate API responses against OpenAPI/Swagger specifications, JSON Schema definitions, and consumer-driven contracts to prevent breaking changes
Testing API schema evolution patterns including additive changes, field deprecation, type widening, and backward-compatible migration strategies.
Automatically generate comprehensive API test suites from OpenAPI specifications covering CRUD operations, error handling, authentication, pagination, and edge cases
Comprehensive RESTful API testing patterns covering HTTP methods, status codes, request/response validation, authentication, error handling, and contract testing.
Approval testing methodology using ApprovalTests library for verifying complex outputs against human-approved results with diff-based review.
Testing augmented and virtual reality applications including spatial tracking, gesture recognition, performance on headsets, and motion sickness testing.
Mobile application testing skill using Appium for iOS and Android, covering device capabilities, selectors, gestures, and cross-platform testing strategies.
Testing API versioning strategies including URL path, header, and query parameter versioning with backward compatibility validation.
Modern cloud-scale load testing using Artillery.io for HTTP, WebSocket, Socket.io, and custom protocol testing with YAML-based test definitions.
Write and run Artillery load tests with YAML phases and scenarios, CSV data payloads, the expect plugin for functional checks, and ensure thresholds that fail CI when latency or error budgets are breached.
Comprehensive website auditing skill using Lighthouse, PageSpeed Insights, and web performance APIs to audit performance, accessibility, SEO, best practices, and security.
Comprehensive authentication testing including login flows, password policies, MFA, session management, account lockout, and SSO integration.
Comprehensive authentication and authorization bypass testing including session hijacking, privilege escalation, JWT manipulation, and access control verification
Behavior-Driven Development skill using Cucumber, covering feature files, step definitions, Gherkin best practices, data tables, scenario outlines, and hooks.
Role-based and attribute-based access control testing including permission matrices, privilege escalation prevention, and resource-level authorization.
Behavior-Driven Development with Gherkin syntax, step definitions, scenario outlines, data tables, and living documentation generation.
Testing library backward compatibility including public API surface verification, semver compliance, TypeScript type compatibility, and migration path validation.
Accessibility testing skill using axe-core and Playwright for automated WCAG 2.1 compliance auditing, custom rules, and accessibility reporting.
PHP BDD testing with Behat framework using Gherkin feature files, Mink browser extension, context classes, and Symfony integration for behavior-driven acceptance testing.
Smart contract testing with Hardhat, Foundry, and Brownie including unit tests, gas optimization, reentrancy checks, and fork testing.
Python BDD testing with Behave framework using Gherkin feature files, step definitions, environment hooks, and Selenium integration for behavior-driven acceptance testing.
Teach agents to use AI browser agents for exploratory and smoke QA with step budgets, evidence-based assertions, guardrails, and Playwright conversion.
Generate boundary value test cases for numeric ranges, string lengths, date ranges, collection sizes, and domain-specific constraints using systematic analysis techniques
Testing browser extensions including content script injection, background worker testing, popup UI testing, storage API testing, and cross-browser compatibility.
CLI tool for persistent browser automation with multi-session support, featuring Chromium/Real/Remote browser modes, cookie management, JavaScript execution, and long-running automation workflows.
BrowserBash is a vendor-independent, natural-language browser automation CLI. Drive a real browser from plain-English objectives or committable Markdown tests, run on local Chrome, CDP/Playwright MCP, Browserbase, LambdaTest, or BrowserStack, and stream NDJSON results with CI exit codes — using free local Ollama models or any cloud LLM.
Cloud-based cross-browser and cross-device testing with BrowserStack including Automate, App Automate, Percy visual testing, Observability, and integration with Playwright, Selenium, and CI/CD pipelines.
Bug report writing skill covering clear reproduction steps, severity classification, effective communication, triage processes, and defect lifecycle management.
Fuzz testing for Rust applications using cargo-fuzz and libFuzzer to discover memory safety issues, panics, and undefined behavior.
Fast test execution with Bun's built-in test runner including snapshot testing, mocking, code coverage, lifecycle hooks, DOM testing with happy-dom, and migration from Jest and Vitest to Bun test.
Web application security testing using BurpSuite for proxy-based interception, scanning, and manual penetration testing of web applications.
Canary deployment validation testing including traffic splitting, metric comparison, automatic rollback triggers, and health score calculation.
Testing CDN configurations, cache hit ratios, cache invalidation, TTL policies, and edge caching behavior for optimal content delivery.
Expert-level Capybara acceptance testing skill for Ruby and Rails applications. Covers RSpec integration, DSL methods, scoping, Page Objects with SitePrism, JavaScript interactions, and database cleaning strategies.
Map changelog entries and release notes to affected test cases, ensuring every user-facing change has corresponding test coverage verification.
Advanced chaos engineering patterns using Chaos Monkey, Litmus, and Gremlin for testing distributed system resilience under failure conditions.
Chaos testing for Kubernetes workloads using Chaos Mesh, Litmus, and custom fault injection for pod, network, and disk failures.
Teach agents to build synthetic monitoring as code with Checkly, including Playwright browser checks, API checks, alerting, and CI deploy workflows.
Expert-level CI/CD pipeline skill for test automation. Covers GitHub Actions, Jenkins, GitLab CI, Azure DevOps, parallel execution, matrix strategies, caching, artifact management, and deployment gates.
Teach agents to shard and parallelize Playwright, Jest, and pytest suites in CI to reduce wall-clock time while merging reports reliably.
Teach agents to use the Chrome DevTools MCP server for performance testing with traces, Core Web Vitals, throttling, and evidence-based analysis.
Optimize CI test pipelines through intelligent test splitting, parallelization, caching strategies, and selective test execution based on code changes.
CI/CD pipeline configuration skill for test automation, covering GitHub Actions, Jenkins, GitLab CI, test parallelization, reporting, and artifact management.
Measure and enforce test coverage with Istanbul/nyc, c8, Jest, and Vitest. Covers branch versus line coverage, per-directory thresholds, CI gates, and correctly excluding generated code from reports.
The complete QA skill for Claude Code — turn Claude into an expert QA engineer that picks the right test type, writes reliable Playwright, Cypress, and pytest tests, eliminates flaky tests, enforces coverage, and wires up CI. Claude Code QA testing done right.
Expert-level Codeception testing skill for PHP applications. Covers acceptance, functional, and unit testing with the Actor pattern, BDD-style syntax, Page Objects, API testing, and database helpers.
Master code review best practices with constructive feedback patterns, quality assurance standards, review checklists, security considerations, and collaborative improvement techniques for high-quality software delivery.
Testing patterns for Clerk authentication including sign-in flow testing, protected route testing, webhook verification, middleware testing, and organization-based access control
Evaluate interface complexity by measuring information density, decision points, visual hierarchy, and task completion paths to reduce user cognitive burden.
Claude Skills — questions
Answers built from the skills we actually parsed.