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.
FastAPI application testing with TestClient, dependency injection overrides, async testing, database testing with SQLAlchemy, and OpenAPI validation.
Testing feature flag implementations including flag evaluation, gradual rollout verification, fallback behavior, and flag cleanup detection.
Validate the first-time user experience including onboarding flows, empty states, tutorial completion, progressive disclosure, and initial setup wizards
Comprehensive file upload testing including format validation, size limits, malware scanning, storage verification, and concurrent upload handling.
Diagnose flaky test failures from Playwright reports, traces, and rerun history. Classify each failure as product, test, environment, data, or unknown with cited evidence and a proposed fix. Never auto-modifies code without opt-in.
Detect, quarantine, and systematically fix flaky tests with automated retry analysis, root cause categorization, and CI pipeline integration for test reliability
High-performance load testing using Gatling with Scala/Java DSL for simulating thousands of concurrent users and analyzing response time distributions.
Exhaustive testing of form validation logic including boundary values, injection payloads, encoding edge cases, and client-server validation bypass techniques
Flutter app testing with widget tests, integration tests, golden tests, Mockito, bloc testing, and Flutter Driver for end-to-end scenarios.
Flask application testing with test client, fixture patterns, SQLAlchemy model testing, blueprint testing, and Flask-specific extension testing.
Frontend performance testing covering bundle size analysis, render performance, animation frame rate, React re-render detection, and lazy loading verification.
Test automation with Gauge framework using Markdown specifications, step implementations in Java/Python/JavaScript/Ruby/C#, concepts, data-driven testing, and living documentation.
Testing GDPR compliance requirements including data deletion, consent management, data portability, right to erasure, and privacy policy enforcement.
Browser automation testing with Geb framework for Groovy/JVM using jQuery-like content DSL, Page Object pattern, Spock integration, and WebDriver abstraction.
Setting up and optimizing test pipelines in GitHub Actions with caching, parallel execution, matrix builds, and test result reporting.
Debug and fix failing GitHub PR checks by inspecting GitHub Actions logs, summarizing failure context, drafting fix plans, and implementing fixes after approval.
Go testing with testing package, table-driven tests, subtests, benchmarks, test fixtures, httptest, and testify assertions.
Golden file testing pattern for comparing output against approved baselines with update workflows, diff tools, and version control integration.
Testing GraphQL subscriptions including WebSocket lifecycle, real-time event delivery, authorization on subscriptions, and connection management.
gRPC service testing including protobuf validation, streaming tests, error handling, deadline testing, and load testing for gRPC endpoints.
Comprehensive GraphQL API testing including query/mutation testing, schema validation, resolver testing, subscription testing, and N+1 query detection.
Testing HIPAA compliance for healthcare applications including PHI handling, audit logging, access controls, and data encryption verification.
i18n testing covering locale switching, date/number formatting, RTL layout, plural forms, ICU messages, and translation completeness verification.
Testing image processing pipelines including format conversion, resize quality, metadata handling, watermark verification, and thumbnail generation.
Integration testing strategies including database integration, external service integration, message queue testing, and test container patterns.
IoT device testing including firmware validation, protocol testing (MQTT, CoAP), power consumption testing, and over-the-air update verification.
Detecting and testing infrastructure drift between desired state and actual state using automated scanning, alerting, and remediation patterns.
BDD-style JavaScript testing with Jasmine covering spies, async patterns, custom matchers, clock manipulation, and comprehensive test organization for frontend and Node.js applications.
Modern JavaScript testing strategies with Jest, Mocha, and testing best practices covering unit testing, integration testing, mocking, async patterns, and DOM testing.
Apply classic test design techniques the ISTQB way, equivalence partitioning, boundary value analysis, decision tables, state transition testing, and pairwise combinations, to derive minimal high-coverage test sets from requirements.
Teaches the agent the right way to mock in Jest — jest.fn, mockImplementation, mockResolvedValue, jest.mock factories, spyOn with restore, and isolating modules like axios.
Run QA work in Jira like a professional, bug lifecycle and triage, JQL queries for testers, quality dashboards, sprint QA rituals, and REST API automation for bulk bug operations and reporting.
Unit testing skill using Jest for TypeScript and JavaScript, covering mocking, spies, snapshots, coverage, async testing, and custom matchers.
Load and performance testing skill using Apache JMeter, covering test plans, thread groups, assertions, listeners, timers, and distributed testing.
Production-grade Java unit and integration testing with JUnit 5 covering assertions, parameterized tests, lifecycle hooks, Mockito mocking, nested tests, and extensions.
Comprehensive JWT token security testing including signature verification, expiration checks, algorithm confusion attacks, and claim validation.
Test Kafka-based event-driven systems, producer and consumer integration tests with Testcontainers, schema compatibility gates, idempotency and ordering verification, dead-letter handling, and end-to-end event flow assertions.
Performance and load testing skill using k6, covering load test scripts, thresholds, scenarios, checks, custom metrics, and results analysis.
Comprehensive Karma test runner skill for browser-based JavaScript unit testing with Jasmine, Mocha, or QUnit frameworks, real browser execution, coverage reporting, and CI/CD pipeline integration.
Kotlin testing with JUnit 5, MockK, Kotest, coroutine testing, Android testing with Espresso, and Kotlin-specific assertion libraries.
Comprehensive testing patterns for Katalon Studio including codeless record-and-playback, Groovy scripted testing, custom keywords, data-driven testing, cross-browser execution, and CI/CD integration with Katalon TestOps.
Kubernetes deployment testing including manifest validation, Helm chart testing, pod health checks, network policy testing, and rollback verification.
Instrument LLM apps with Langfuse tracing, then use traces, scores, and datasets to test in production, run evaluations on real traffic, catch regressions, and close the loop from incident to golden dataset.
Expert-level Laravel Dusk browser testing skill for PHP/Laravel applications. Covers Chrome-based E2E testing, browser assertions, Page Objects, component testing, authentication helpers, and database integration.
Laravel PHP testing with PHPUnit, feature tests, browser tests with Dusk, database factories, mocking facades, and HTTP testing helpers.
Expert-level Lettuce BDD testing skill for Python applications. Covers Gherkin feature files, step definitions, terrain hooks, Selenium integration, data-driven scenarios, and migration guidance to Behave for modern projects.
Coverage-guided fuzz testing using libFuzzer for C/C++ applications to find memory corruption, buffer overflows, and crash-inducing inputs.
Automated open-source license compliance testing to detect license conflicts, copyleft violations, and license compatibility issues in dependencies.
Automated web performance auditing using Google Lighthouse for Core Web Vitals, accessibility, SEO, and best practices scoring with CI integration.
Testing LLM-powered features including output quality validation, hallucination detection, token usage monitoring, and prompt regression testing.
Testing load balancer configurations including health check validation, routing algorithms, session affinity, failover behavior, and SSL termination.
Security testing for LLM-powered applications including prompt injection, jailbreak detection, data leakage prevention, and AI safety testing.
Verify loading indicators, skeleton screens, and progress bars appear correctly during async operations and disappear on completion or error.
Detect localization and internationalization defects including untranslated strings, text expansion overflow, RTL layout issues, and locale-specific formatting errors
Python-based load testing with Locust for writing user behavior scripts, distributed testing, real-time web UI monitoring, and custom load shapes.
Testing logging implementations including log level verification, structured logging validation, log rotation testing, and log aggregation pipeline testing.
Black-box mobile UI testing with Maestro YAML flows - launchApp, tapOn, inputText, assertVisible, reusable runFlow subflows, environment parameters, JUnit reporting, and emulator-based CI pipelines.
AI-powered testing patterns with Mabl including auto-healing tests, visual regression, API testing, performance monitoring, CI/CD integration, and intelligent test maintenance using Mabl's machine learning capabilities.
Comprehensive testing patterns for Model Context Protocol servers including tool validation, transport testing, schema verification, and end-to-end MCP integration testing with stdio and SSE transports.
Identify and diagnose memory leaks in web applications using heap snapshots, allocation timelines, and automated leak detection patterns.
Claude Skills — questions
Answers built from the skills we actually parsed.