Testing Claude Skills
3 543 testing skills from 425 authors. They run test suites, check accessibility and catch what broke. Half of them fit into 1 799 tokens or less — that is what one costs your context window when the agent loads it. 404 ship runnable scripts rather than instructions alone. 2 of them cannot work without an MCP server, most often rube. We also found 429 copies of these same skills sitting in other people's repositories — counted once here, not 429 times.
3 543 unique 425 authors 2 updated this month 331 from vendors
WebSocket testing including connection lifecycle, reconnection logic, message ordering, backpressure handling, and binary frame testing.
API simulation and service virtualization with WireMock for HTTP stubbing, request matching, stateful behavior, and fault injection testing.
iOS UI testing with XCUITest framework covering element queries, gesture simulation, accessibility testing, and Xcode test plan configuration.
Teach agents to manage Jira test cases and executions with Xray and Zephyr, including issue modeling, JQL, and CI result publishing through REST APIs.
Cross-site scripting vulnerability testing covering reflected, stored, and DOM-based XSS with sanitization validation and CSP bypass detection.
Comprehensive xUnit.net testing skill for writing reliable unit, integration, and acceptance tests in C# with [Fact], [Theory], fixtures, dependency injection, and parallel execution strategies.
Writing and testing YARA rules for malware detection, threat hunting, and file classification with rule validation and false-positive rate testing.
Comprehensive testing patterns for Zod schemas covering validation testing, transform testing, error message verification, and integration with API endpoints and forms
Comprehensive skills for creating, compiling, debugging, and managing GitHub Agentic Workflows (gh-aw) with best practices and common patterns
Use when running E2E tests, setting up the E2E environment, debugging E2E test failures, or verifying code changes work from a user's perspective. Triggers include "run E2E tests", "verify changes", "Playwright", "test setup", "E2E failures".
> Use when writing tests of any kind — unit, slice, or integration. Covers test structure, naming conventions, Mockito patterns, @WebMvcTest, @DataJpaTest, and Testcontainers setup.
> Use when writing tests of any kind — unit, slice, or integration. Covers test structure, naming conventions, Mockito patterns, @WebMvcTest, @DataJpaTest, and Testcontainers setup.
R package development guide covering dependencies, API design, testing, and documentation. Use when developing R packages.
Test-driven development workflow for R using testthat. Use when writing new features, fixing bugs, or refactoring code. Enforces test-first development with 80%+ coverage.
Ingestion architecture and implementation principles. Use for design, review, meaningful refactoring, Azure integration, document security, testing, or operational changes.
Expert in end-to-end testing with Playwright, the modern cross-browser testing framework. Specializes in test generation, page object patterns, visual regression testing, and CI/CD integration. Handles complex testing scenarios including authentication flows, API mocking, and mobile emulation.
Expert in building blazing-fast reactive dashboards with comprehensive testing. Masters React performance patterns, testing strategies for async components, and real-world patterns from Linear, Vercel, Notion.
Documentation expert for Claude Skills showcase website. Maintains skill-to-website sync, manages tag taxonomy and badges, creates blog-style artifacts, and preserves multi-skill collaborations for posterity. Activate on 'document', 'sync skills', 'create artifact', 'validate skills', 'add tags', 'tag management', 'badge', 'metadata'. NOT for code implementation (use domain skills), design creation (use web-design-expert), testing (use test-automator), or project planning (use orchestrator).
Comprehensive test automation specialist covering unit, integration, and E2E testing strategies. Expert in Jest, Vitest, Playwright, Cypress, pytest, and modern testing frameworks. Guides test pyramid design, coverage optimization, flaky test detection, and CI/CD integration. Activate on 'test strategy', 'unit tests', 'integration tests', 'E2E testing', 'test coverage', 'flaky tests', 'mocking', 'test fixtures', 'TDD', 'BDD', 'test automation'. NOT for manual QA processes, load/performance testing (use performance-engineer), or security testing (use security-auditor).
Comprehensive UX analysis using cognitive psychology, ADHD-friendly design, Gestalt principles, and flow state engineering. Specializes in friction audits, user journey simulation, cognitive load optimization, and Fitts' Law application. Activate on "analyze UX", "friction audit", "user journey", "ADHD-friendly", "optimize flow", "reduce cognitive load", "UX audit", "conversion optimization". NOT for visual design execution (use web-design-expert), A/B testing implementation (use frontend-developer), or accessibility compliance auditing (use accessibility-auditor).
Write tests using Vitest and React Testing Library. Use when creating unit tests, component tests, integration tests, or mocking dependencies. Activates for test file creation, mock patterns, coverage, and testing best practices.
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing
Brief description of what this skill does and when to use it.
Sets up the Meta XR Simulator for testing Meta Quest and Horizon OS apps without a physical device. Use when configuring device-free testing for Unity or Unreal projects.
创建、设计、修改、升级、重构和验证 AgentDock Skill 时使用；负责可移植核心、文档、引用、辅助脚本、测试、版本和本地安装验证。
Investigate, reproduce, and safely fix a bug with regression protection. Composes context, diagnosis, architecture, code quality, and testing guardrails into a reproduce-first repair workflow. Use when the user says 'fix this bug', 'debug this', 'investigate this failure', 'patch this regression', 'repair this issue', or 'why is this broken'.
Apply test quality principles when generating or reviewing test code. Enforces Arrange-Act-Assert structure, one behavior per test, assertion quality, test isolation, meaningful naming, and test data management. Use when writing tests, reviewing test code, or when the user mentions 'write tests', 'test this', 'test quality', 'test review', 'improve tests', or 'test structure'. This skill governs the craft of writing individual test cases -- not what to test (that is driven by the code being implemented) but how to write tests that are reliable, readable, and maintainable.
Suede-owned experimentation discipline for hypotheses, sample sizing, test duration, significance, and repeatable experiment programs. Use when comparing variants, deciding whether a result is reliable, or building an experiment backlog and cadence. NOT FOR: analytics instrumentation (use suede-analytics), post-click conversion diagnosis (use suede-site-alchemy), or writing the variant copy itself (use suede-copy).
Plan, build, test, and release a production-grade native Android app from a product idea through Google Play. Use for requests to create, ship, submit, monetize, or modernize an Android app. Covers Kotlin and Jetpack Compose architecture, API-level policy verification, accessibility, privacy and Data Safety, Play Billing, Play Integrity, account deletion, testing, performance, store assets, signing, staged rollout, and a release evidence gate. Not for iOS work or a review-only pass on an existing app.
Design AI evals that catch regressions before users do: rubrics, test cases, failure modes, acceptance gates, and AI-SPEC artifacts.
Make Suede interfaces feel intentional: tokens, color, components, type, visual hierarchy, motion, dark mode, and visual QA for shipped screens.
Package finished work so people can use it: README, docs, install commands, proof links, QA, release copy, and handoff notes.
Catch MCP drift before release: skill catalogs, tool and resource schemas, prompts, install paths, JSON-RPC behavior, and docs alignment.
> Build Spring Boot 4.x applications following the best practices. * When developing Spring Boot applications using Spring MVC, Spring Data JPA, Spring Modulith, Spring Security * To create recommended Spring Boot package structure * To implement REST APIs, entities/repositories, service layer, modular monoliths * To use Thymeleaf view templates for building web applications * To write tests for REST APIs and Web applications * To write ArchUnit tests for testing architecture * To configure the recommended plugins and configurations to improve code quality, and testing while using Maven. * To use Spring Boot's Docker Compose support for local development * To create Taskfile for easier execution of common tasks while working with a Spring Boot application
Design, generate, and deliver client performance reports across all channels, covering quarterly reports, tax reporting, portal integration, and compliance review. Use when the user asks about building or redesigning report templates, choosing what to include in quarterly or annual client reports, transitioning from print to digital delivery, integrating a client portal, presenting net-of-fee performance with benchmarks, managing report production timelines, or handling e-delivery consent. Also trigger when users mention 'client reporting', 'quarterly performance report', 'report customization', 'tax lot report', '1099 supplement', 'report disclaimers', 'UHNW reporting', or 'report QA process'.
Apply statistical methods to financial data including descriptive statistics, covariance estimation, regression, hypothesis testing, and resampling. Use when the user asks about return distributions, correlation between assets, building a covariance matrix, running a CAPM regression, testing whether alpha is significant, checking if returns are normal, or estimating confidence intervals. Also trigger when users mention 'volatility', 'how correlated are these', 'fat tails', 'skewness', 'R-squared', 'beta of a fund', 'bootstrap a Sharpe ratio', 'shrinkage estimator', 'Ledoit-Wolf', or ask why their optimizer produces unstable weights.
Apply factor models to portfolio construction and fund evaluation, from CAPM through the Fama-French 3- and 5-factor models plus momentum. Use when the user asks about 'Fama-French', 'value factor', 'smart beta', 'factor tilt', 'momentum exposure', or the 'factor zoo', wants to run or interpret a factor regression (loadings, alpha after controlling for factors, R-squared, t-stats), decompose a manager's returns into factor exposures versus skill, or asks 'is my fund closet indexing'. Also trigger on SMB, HML, RMW, CMA, UMD, size/value/quality/profitability/low-vol premia, factor ETF or smart-beta product evaluation (factor purity, turnover, capacity, fees), factor cyclicality and the danger of factor timing, factor crowding, long-short academic factors versus long-only implementable tilts, and post-publication factor decay.
Estimate potential future losses using VaR, Expected Shortfall, Monte Carlo simulation, and stress testing. Use when the user asks about Value-at-Risk, CVaR, Expected Shortfall, scenario analysis, stress testing, or factor-based risk decomposition. Also trigger when users mention 'how much could I lose', 'worst-case scenario', 'tail risk', 'risk budget', 'component VaR', 'marginal VaR', '99% confidence loss', 'Monte Carlo simulation', or ask how to project portfolio risk forward.
Write tests for datadog-ci commands and helpers using established repository patterns.
Review code changes for bugs, regressions, convention violations, and high-value cleanup opportunities. Use for diffs, commit ranges, PRs, paths, staged changes, or working-tree changes.
> field visibility, cascading filters, calculated fields, custom buttons, server calls, form validation, child table logic, debugging. Covers step-by-step workflows from Setup > Client Script through form logic workflow, dynamic UI, calculate fields, frm.call, frappe.call, frappe.xcall, client script testing, field dependency, custom button, how to hide field, show field based on value, add button to form, calculate total, dynamic form.
> file creation, lifecycle hooks, validation, autoname, submittable workflows, controller override, child table controllers, flags system, controller, which hook to use, validate vs on_update, override controller, submittable document, autoname, flags, extend_doctype_class, controller testing, child table controller, which hook to use, when does validate run, how to override save, document lifecycle.
> Use when building a custom Frappe app from scratch. Covers bench new-app walkthrough, app structure decisions, adding DocTypes, hooks, patches, fixtures management, development workflow (bench migrate, build, clear-cache), testing, packaging, installing on another site, version app, new frappe app, bench new-app, app structure, module creation, doctype creation, fixtures, patches, deployment, packaging, data migration, patch file, patches.txt, migrate data between DocTypes, create new app from scratch.
> Use when implementing scheduled tasks and background jobs in Frappe v14/v15/v16. Covers hooks.py scheduler_events, frappe.enqueue, queue selection, job deduplication, testing with bench execute/scheduler, monitoring via Scheduled Job Log and RQ Dashboard, error handling, long-running job patterns, email digest, data cleanup, and report processing, queue selection, job deduplication, scheduler implementation, run task automatically, background process, scheduled task not running, async task.
> Use when building API endpoints with @frappe.whitelist() in Frappe. Covers endpoint design, permission patterns, error handling, client integration, file uploads, background jobs, rate limiting, REST API testing, and migration from Server Scripts to whitelisted methods. Prevents permission bypasses, SQL injection, and data exposure. frappe.whitelist, API permission, guest API, secure endpoint, rate limiting, curl testing, frm.call.
> Use when setting up CI/CD pipelines for Frappe apps, configuring GitHub Actions test workflows, or adding linting and security scanning. Prevents broken CI from incorrect test matrix configuration, missing MariaDB/Redis services, and uncaught code quality issues. Covers GitHub Actions workflows, test matrix (Python/Node versions), semgrep rules, pre-commit hooks, linting (ruff, eslint), CI test environment setup.
> Use when writing unit tests, integration tests, creating test fixtures, or running tests with bench run-tests. Prevents flaky tests from missing fixtures, incorrect test isolation, and wrong test base classes. Covers frappe.tests.utils, IntegrationTestCase, UnitTestCase, test fixtures, bench run-tests flags, test naming conventions.