2,373 free skills
Skills for writing and running tests — framework-specific patterns for Jest, Vitest, pytest, Go testing, RSpec, JUnit, Playwright, Cypress, and more.
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15 tools across six categories
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web-browser-automation
spillwavesolutions/automating-mac-apps-plugin
Comprehensive macOS browser automation using PyXA, Playwright, Selenium, and Puppeteer for desktop web testing, scraping, and workflow automation. Use when asked to "automate web browsers", "Selenium Chrome automation", "Playwright testing", "Puppeteer scraping", or "cross-browser automation". Supports Chrome, Edge, Brave, Arc browsers.
python-pro
alexander-danilenko/cortex-ai-skills
Use when building Python 3.11+ applications requiring type safety, async programming, or production-grade patterns. Invoke for type hints, pytest, async/await, dataclasses, mypy configuration.
security-reviewer
alexander-danilenko/cortex-ai-skills
Use when conducting security audits, reviewing code for vulnerabilities, or analyzing infrastructure security. Invoke for SAST scans, penetration testing, DevSecOps practices, cloud security reviews.
worktrees
neolabhq/context-engineering-kit
Use when working on multiple branches simultaneously, context switching without stashing, reviewing PRs while developing, testing in isolation, or comparing implementations across branches - provides git worktree commands and workflow patterns for parallel development with multiple working directories.
elixir-testing
vinnie357/claude-skills
Guide for Elixir testing with ExUnit. Use when writing unit tests, implementing property-based tests, setting up mocks, or organizing test suites.
kafka-shadowtraffic-java
lensesio/agentic-engineering-for-apache-kafka
Generate a TestContainers Java test class that spins up ShadowTraffic in-process to populate a Kafka topic with synthetic data during tests. Invokes the kafka-shadowtraffic skill to build the ShadowTraffic config, then adapts it for a containerized test network and scaffolds a JUnit 5 test class with Kafka, optional Schema Registry, and ShadowTraffic containers wired together. Use when the user says "set up a Java TestContainers test with ShadowTraffic", "write a Java test that generates Kafka data", "create a TestContainers test for my Kafka consumer", "I want to test my Kafka consumer with synthetic data in Java", or "scaffold a ShadowTraffic Java test". Do NOT use for non-Java projects, standalone Docker setups (use kafka-shadowtraffic instead), or creating Kafka topics.
ring:dev-chaos-testing
lerianstudio/ring
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application-migration
dauquangthanh/hanoi-rainbow
Guides comprehensive application migration projects including legacy system modernization, cloud migration, technology stack upgrades, database migration, and architecture transformation. Covers assessment, planning, migration strategies (strangler fig, big bang, phased), risk management, data migration, testing, and cutover. Use when migrating applications, modernizing legacy systems, moving to cloud, changing technology stacks, or when users mention "migration", "modernization", "replatform", "lift and shift", "refactor", "strangler pattern", or "legacy transformation".
dbt-transformation-patterns
rmyndharis/antigravity-skills
Master dbt (data build tool) for analytics engineering with model organization, testing, documentation, and incremental strategies. Use when building data transformations, creating data models, or implementing analytics engineering best practices.
boxlang-core-dev-component-development
ortus-boxlang/skills
Use this skill when creating custom BoxLang components (tags): component file structure, attribute declarations, body/output handling, registering component paths in modules, the difference between components and classes, and testing custom components.
integration-tests
iulspop/aidd-skills
Generates integration tests for server actions, database operations, and API routes using Vitest with the "given/should" prose format. Use when testing infrastructure facades, route actions, session management, or multi-service interactions.
tdd-mutation
vadimcomanescu/agents-skills
Drives implementation with strict TDD and proves the resulting tests actually catch bugs via mutation testing. Use when implementing any feature, fixing any bug, refactoring code that has tests, or changing observable behavior. Use when the user says "implement", "add", "fix", "make it do X", "change how Y works", or asks "do my tests actually catch bugs". Do not use for pure config changes, documentation, or spike code committed for deletion.
jahro-snapshots
jahro-console/unity-agent-skills
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terraform-test
hashicorp/terraform-agent-kit
Comprehensive guide for writing and running Terraform tests. Use when creating test files (.tftest.hcl), writing test scenarios with run blocks, validating infrastructure behavior with assertions, mocking providers and data sources, testing module outputs and resource configurations, or troubleshooting Terraform test syntax and execution.
e2e-testing
yonatangross/orchestkit
End-to-end testing with Playwright 1.58+. Use when testing critical user journeys, browser automation, cross-browser testing, AI-assisted test generation, or validating complete application flows.
gentleman-e2e
gentleman-programming/gentleman.dots
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spring-webflux-testing
spring-ai-community/spring-testing-skills
WebFlux testing requires StepVerifier for reactive streams — standard assertions silently pass on empty Flux. WebTestClient API differs from MockMvc. Read before testing reactive endpoints. Triggers: @WebFluxTest, WebTestClient, StepVerifier, Mono, Flux, mockUser(), mockJwt(), mutateWith, verifyComplete, expectBody, expectStatus, @AutoConfigureWebTestClient.
api-integration-testing
thapaliyabikendra/ai-artifacts
Integration testing patterns for ABP Framework APIs using xUnit and WebApplicationFactory. Use when: (1) testing API endpoints end-to-end, (2) verifying HTTP status codes and responses, (3) testing authorization, (4) database integration tests.
mutation-hunter
lousy-agents/skills
Uncover test coverage gaps by applying semantic mutations to production TypeScript, Go, or Python code and identifying which mutations survive (tests still pass). Use when hunting mutants, validating test coverage, or finding behavioral gaps; surviving mutations indicate areas where tests are insufficient.
property-test-generator
nimiusrd/agent-skills
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provider-resources
hashicorp/terraform-agent-kit
Implement Terraform Provider resources and data sources using the Plugin Framework. Use when developing CRUD operations, schema design, state management, and acceptance testing for provider resources.
improving-python-coverage
streamlit/streamlit
Runs Python unit tests with coverage, analyzes coverage reports, and implements meaningful tests to increase coverage by ~0.2%. Use when you want to systematically improve Python test coverage with high-value test cases.
mastering-python-skill
spillwavesolutions/agent-brain
Modern Python coaching covering language foundations through advanced production patterns. Use when asked to "write Python code", "explain Python concepts", "set up a Python project", "configure Poetry or PDM", "write pytest tests", "create a FastAPI endpoint", "run uvicorn server", "configure alembic migrations", "set up logging", "process data with pandas", or "debug Python errors". Triggers on "Python best practices", "type hints", "async Python", "packaging", "virtual environments", "Pydantic validation", "dependency injection", "SQLAlchemy models".
a11y-testing
yonatangross/orchestkit
Automated accessibility testing with axe-core, Playwright, and jest-axe for WCAG compliance. Use when adding or validating a11y tests, running WCAG checks, or auditing UI accessibility.
pytest-advanced
yonatangross/orchestkit
Advanced pytest patterns including custom markers, plugins, hooks, parallel execution, and pytest-xdist. Use when implementing custom test infrastructure, optimizing test execution, or building reusable test utilities.
qa-engineer
dralgorhythm/claude-agentic-framework
Define test strategy and verify quality against WCAG and testing-pyramid criteria — a user-invoked QA Engineer workflow.
playwright-expert
alexander-danilenko/cortex-ai-skills
Use when writing E2E tests with Playwright, setting up test infrastructure, or debugging flaky browser tests. Invoke for browser automation, E2E tests, Page Object Model, test flakiness, visual testing.
dhh-rails-reviewer
ratacat/claude-skills
Use this agent when you need a brutally honest Rails code review from the perspective of David Heinemeier Hansson. This agent excels at identifying anti-patterns, JavaScript framework contamination in Rails codebases, and violations of Rails conventions. Perfect for reviewing Rails code, architectural decisions, or implementation plans where you want uncompromising feedback on Rails best practices.\\n\\n<example>\\nContext: The user wants to review a recently implemented Rails feature for adherence to Rails conventions.\\nuser: \"I just implemented a new user authentication system using JWT tokens and a separate API layer\"\\nassistant: \"I'll use the DHH Rails reviewer agent to evaluate this implementation\"\\n<commentary>\\nSince the user has implemented authentication with patterns that might be influenced by JavaScript frameworks (JWT, separate API layer), the dhh-rails-reviewer agent should analyze this critically.\\n</commentary>\\n</example>\\n\\n<example>\\nContext: The user is planning a new Rails feature and wan...
evaluating-skills-with-models
taisukeoe/agentic-ai-skills-creator
Evaluate skills by executing them across sonnet, opus, and haiku models using sub-agents. Use when testing if a skill works correctly, comparing model performance, or finding the cheapest compatible model. Returns numeric scores (0-100) to differentiate model capabilities.
junit-expert
ortus-solutions/skills
Use when writing, reviewing, or structuring JUnit 5 tests for Java applications. Invoke for test lifecycle, parameterized tests, test extensions, assertions, test organization, parallel execution, test suites, dynamic tests, and integration with build tools.
playwright-testing
terminalskills/skills
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e2e-tests
iulspop/aidd-skills
Generates end-to-end tests using Playwright with the "given/should" prose format. Use when writing e2e tests for user flows, page interactions, or integration scenarios that exercise the full application stack.
test-standards-enforcer
yonatangross/orchestkit
Enforce testing best practices - AAA pattern, naming conventions, isolation, coverage thresholds. Blocks non-compliant tests. Use when writing or reviewing tests.
recipe-prepare-implementation
shinpr/claude-code-workflows
Verifies the work plan is implementable end-to-end and resolves verification-lane / fixture / E2E-environment gaps before the build phase begins. Use when "implement-ready/verification readiness/lane setup/E2E environment missing" is mentioned, or before any build phase begins on a work plan whose readiness has not been preflight-checked.
dhh-rails-reviewer
udecode/plate
Conditional code-review persona, selected when Rails diffs introduce architectural choices, abstractions, or frontend patterns that may fight the framework. Reviews code from an opinionated DHH perspective.
ansible-testing
basher83/lunar-claude
>
Mobile Application Security Testing
zebbern/secops-cli-guides
This skill should be used when the user asks to "perform mobile application penetration testing", "test Android app security", "bypass SSL pinning", "analyze APK files", "reverse engineer mobile apps", "test for insecure data storage", or "assess mobile app vulnerabilities". It provides comprehensive techniques for Android application security assessment.
post-dev-test
sd0xdev/sd0x-dev-flow
Post-development test completion. Use when: checking test coverage after feature-dev, writing missing integration/e2e tests. Not for: unit test generation (use codex-test-gen), test review (use test-review). Output: test files + coverage report.
bmad-qa-generate-e2e-tests
bmad-labs/skills
Generate end to end automated tests for existing features. Use when the user says "create qa automated tests for [feature]"
integration-testing
yonatangross/orchestkit
Integration testing patterns for APIs and components. Use when testing component interactions, API endpoints with test databases, or service layer integration.
performance-testing
yonatangross/orchestkit
Performance and load testing with k6 and Locust. Use when validating system performance under load, stress testing, identifying bottlenecks, or establishing performance baselines.
pytest
imankulov/skills
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golang
akindu23/my-agent-skills
Routes Go work to the right reference guides and conventions for the task. Use when working on Go architecture, implementation, refactoring, concurrency, error handling, testing, performance, or code review.
gradle-dependency-management
dawiddutoit/custom-claude
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e2e-ci-debug
lgariv-dn/frontend-skills
Debug CI E2E failures from pull requests by inspecting GitHub checks, downloading Playwright reports, and mapping failures to local Nx commands. Use when debugging failed E2E tests in PR workflows.
contract-testing-ts
beecode-rs/msh-test-contractor
Set up and write contract-based tests using the test-contractor library (*.contract.yaml). Use this skill whenever the user wants to write tests, create a contract.yaml file, define test terms for a function or class, mock dependencies in contracts, mentions contract-based testing, or wants to set up a project to run contract tests — even if they don't explicitly say "contract yaml" or "test-contractor". Also use when the user asks to add vitest config for contracts, set up a test:contract script, or configure contract testing in a new or existing package. Always prefer contract.yaml tests over Vitest unit tests. Only fall back to Vitest for test cases that contract.yaml cannot express.
mvvm-toolkit-di
github/awesome-copilot
Wire CommunityToolkit.Mvvm ViewModels into Microsoft.Extensions.DependencyInjection. Covers the .NET Generic Host composition root, constructor injection, service lifetimes (Singleton / Transient / Scoped), IMessenger registration, resolving ViewModels in Views, keyed services, testing seams, and the legacy Ioc.Default escape hatch. Use across WPF, WinUI 3, .NET MAUI, Uno, and Avalonia.
k8s-kind
rohitg00/kubectl-mcp-server
Manage kind (Kubernetes IN Docker) local clusters. Use when creating, testing, or developing with local Kubernetes clusters in Docker containers.
testing
alicoder001/agent-skills
Unified QA testing architecture for strategy, risk-based planning, functional and non-functional coverage, automation, infrastructure, governance, and metrics across the SDLC.
supabase-test
constructive-io/constructive-skills
Test Supabase applications with supabase-test. Use when asked to "test Supabase", "test RLS with Supabase", "write Supabase tests", or when testing applications built on Supabase.
e2e-testing-patterns
thapaliyabikendra/ai-artifacts
Master end-to-end testing with Playwright to build reliable test suites that catch bugs, improve confidence, and enable fast deployment. Use when implementing E2E tests, debugging flaky tests, or establishing testing standards.
testing-knowledge
dykyi-roman/awesome-claude-code
Testing knowledge base for PHP 8.4 projects. Provides testing pyramid, AAA pattern, naming conventions, isolation principles, DDD testing guidelines, and PHPUnit patterns.
playwright-best-practices
sanity-io/sanity
Use when writing Playwright tests, fixing flaky tests, debugging failures, implementing Page Object Model, configuring CI/CD, optimizing performance, mocking APIs, handling authentication or OAuth, testing accessibility (axe-core), file uploads/downloads, date/time mocking, WebSockets, geolocation, permissions, multi-tab/popup flows, mobile/responsive layouts, touch gestures, GraphQL, error handling, offline mode, multi-user collaboration, third-party services (payments, email verification), console error monitoring, global setup/teardown, test annotations (skip, fixme, slow), test tags (@smoke, @fast, @critical, filtering with --grep), project dependencies, security testing (XSS, CSRF, auth), performance budgets (Web Vitals, Lighthouse), iframes, component testing, canvas/WebGL, service workers/PWA, test coverage, i18n/localization, Electron apps, or browser extension testing. Covers E2E, component, API, visual, accessibility, security, Electron, and extension testing.
bmad-party-mode
bmad-labs/skills
Orchestrates group discussions between installed BMAD agents, enabling natural multi-agent conversations where each agent is a real subagent with independent thinking. Use when user requests party mode, wants multiple agent perspectives, group discussion, roundtable, or multi-agent conversation about their project.
node-testing
paldom/node-skills
Builds unit and integration test infrastructure for Node/TS/React - Vitest or node:test selection with explicit config, v8 coverage gates that fail CI, React Testing Library, mocking discipline, flaky-test triage. Use when the user asks to set up tests, add coverage thresholds, pick a test runner, or fix a flaky test setup. Not for E2E browser suites, lint rules, or CI workflow authoring.
mysql-pentesting
wgpsec/aboutsecurity
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pytest-databases
litestar-org/litestar-skills
Auto-activate for pytest_databases, Docker DB fixtures, PostgreSQL/pgvector/ParadeDB, MySQL/MariaDB, Oracle/SQL Server, CockroachDB/YugabyteDB, MongoDB, Redis/Valkey, Elasticsearch, BigQuery/Spanner, Azurite, MinIO, or RustFS tests. Not for mocked databases.
vitest
0froq/skills
Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.
Vitest
oriolrius/pki-manager-web
Expert guidance for Vitest testing framework including unit tests, integration tests, mocking, coverage, React Testing Library integration, and TypeScript testing. Use this when writing tests for Vite-based applications.
pytest-async-testing
dawiddutoit/custom-claude
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