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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accessibility
krzysztofsurdy/code-virtuoso
Web accessibility patterns and WCAG 2.1/2.2 compliance for inclusive user interfaces. Use when the user asks to build accessible components, audit a UI for a11y issues, fix screen reader problems, implement keyboard navigation, check color contrast ratios, add ARIA attributes, create accessible forms, or establish accessibility standards for a team. Covers the POUR principles (Perceivable, Operable, Understandable, Robust), semantic HTML, focus management, and automated/manual a11y testing strategies.
android-app-pentesting
wgpsec/aboutsecurity
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expo-testing
jonmumm/skills
Build, install, and test Expo/React Native apps on simulators and physical devices. Use when asked to "run on simulator", "install on device", "test on phone", "run detox", "preview build", or "build and test".
cdata-driver-cli
justinf-cdata/cdata-skills
Use when the user wants to connect to, query, or explore a data source through a CData driver via the command line. This includes: creating or testing a connection to an enterprise system (Salesforce, NetSuite, Snowflake, SQL Server, Jira, etc.); running SQL queries against connected data; exploring schema (listing tables, columns, or stored procedures); executing source-specific stored procedures; and downloading, installing, or activating CData drivers. Acts as the prerequisite foundation for all driver-level cdata- skills (cdata-salesforce, cdata-airtable, etc.) that add source-specific guidance.
dx
nmnmcc/skills
Improve developer experience when understanding, designing, writing, changing, reviewing, testing, debugging, building, documenting, releasing, or maintaining software. Use when Codex must read or explain a project from overall purpose and structure to local detail, make code beautiful and clear, organize a codebase, shape an API, CLI, configuration, error, or tool, reduce setup or feedback friction, improve contribution and review, or judge any tradeoff that affects how developers understand, change, verify, and operate a system. Treat developers as users and improve their whole journey without trading away correctness, safety, or product behavior.
vitest
hjewkes/agent-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.
stably-sdk-setup
stablyai/agent-skills
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typescript
knoopx/pi
Type-safe JavaScript with bun and vitest. Use when setting up tsconfig.json, defining interfaces, writing branded types, discriminated unions, or type guards.
test-review
nickcrew/claude-cortex
Review test quality and audit test coverage for any module. This skill should be used when reviewing existing tests, auditing test gaps, writing new tests, or when asked to assess test health. It pipelines testing standards into the audit workflow to produce a prioritized gap report. The output is a report, not code — do not write test implementations until the report is reviewed.
RSpec Testing Patterns
kaakati/rails-enterprise-dev
Complete guide to testing Ruby on Rails applications with RSpec. Use this skill when writing unit tests, integration tests, system tests, or when setting up test infrastructure including factories, shared examples, and mocking strategies.
testing-patterns
blogic-cz/agent-tools
This skill should be used when implementing or reviewing testing workflows in template-ts projects, especially for testing, Vitest, Playwright, integration test, and mocking scenarios.
use-vite
gkwa/volcanicviper
Set up Vite and Vitest as the build and test tools, with vite-plugin-checker for TypeScript checking and ESM configuration. Use when starting or configuring a frontend project.
arendt-perspective
nuwa-skills/arendt-skill
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performance
krzysztofsurdy/code-virtuoso
Application performance optimization patterns and profiling-driven methodology. Use when the user asks to optimize application speed, reduce latency, diagnose slow queries, fix N+1 problems, implement caching layers, profile memory usage, tune database queries, apply lazy loading, configure connection pooling, or set performance budgets. Covers CPU and memory profiling, caching strategies (application, HTTP, CDN), query optimization, indexing, and load testing approaches.
message-market-fit
fearofsnakes/pmm-skillset
Use when a PMM wants to audit, test, or improve their product messaging. Trigger on: 'test our messaging', 'audit our copy', 'is our messaging working', 'message-market fit', 'messaging too generic', 'stakeholders keep changing the messaging', 'message testing sprint', 'does our messaging resonate', 'check our website copy', 'score our messaging', 'messaging by committee', 'which message angle should we use', or 'are we talking to the right persona'.
vitest-unit-testing
perdolique/workflow
Write and maintain Vitest unit tests for TypeScript code. Use when the user needs unit coverage for utilities, services, or stores, or asks for Vitest-based tests with mocks, spies, and assertions.
load-testing-plan
mohitagw15856/pm-claude-skills
Write a load and performance testing plan for a service. Use when asked to create a performance test plan, write load testing documentation, define stress or soak test scenarios, or set performance regression gates for CI. Produces a complete test plan document with scenario definitions, k6/Locust script skeleton, threshold table, result interpretation guide, and CI integration steps.
build-and-test
microsoft/agent-framework
How to build and test .NET projects in the Agent Framework repository. Use this when verifying or testing changes.
typescript-dev
tenequm/skills
Builds full-stack TypeScript apps with Vite 8, React 19, Tailwind CSS v4, shadcn/ui, Biome, Vitest, and Hono. Covers the frontend (Vite/Rolldown build and dev server, type-safe React 19, strict TypeScript 6.0, Tailwind/shadcn styling, Biome lint/format, Vitest) and the Hono 4 backend/edge layer (routing, middleware, Zod validation, end-to-end type-safe RPC, OpenAPI, multi-runtime deploy). Use when setting up or working in a TypeScript project: configuring Vite, writing components, the React Compiler, Tailwind/shadcn, dev server and HMR, bundles, tests, lint/format/CI, or building a Hono API and wiring its RPC client to React.
golang-base-practices
cexll/golang-base-practices-skills
Go language best practices guide covering frameworks (Gin/Go-Kratos), ORM (GORM), database migrations (Goose), DDD project structure, error handling, concurrency patterns, testing (99% coverage target), and Lint tools. This skill should be used when writing, reviewing, or refactoring Go code to ensure best practices are followed. Triggers on Go project development, code review, performance optimization, or architecture design.
nestjs
full-stack-skills/nodejs-skills
Provides comprehensive guidance for NestJS using the official documentation. Use when the user asks about NestJS architecture, controllers, providers, modules, middleware, guards, pipes, interceptors, dependency injection, GraphQL, WebSockets, microservices, OpenAPI/Swagger, security, or testing.
laravel-dusk
rawveg/skillsforge-marketplace
Laravel Dusk - Browser automation and testing API for Laravel applications. Use when writing browser tests, automating UI testing, testing JavaScript interactions, or implementing end-to-end tests in Laravel.
laravel-actions
aaronflorey/agent-skills
Write, scaffold, explain, and refactor code using the `lorisleiva/laravel-actions` package. Use this skill whenever the user mentions Laravel Actions, `AsAction`, `php artisan make:action`, action classes, converting a controller, job, listener, or command into an action, dispatching an action as a job, using an action as a controller or listener, or adding validation, authorization, testing, or mocking around an action.
gemini-cli
forayconsulting/gemini_cli_skill
Wield Google's Gemini CLI as a powerful auxiliary tool for code generation, review, analysis, and web research. Use when tasks benefit from a second AI perspective, current web information via Google Search, codebase architecture analysis, or parallel code generation. Also use when user explicitly requests Gemini operations.
money-product
iamzifei/show-me-the-money
Build the actual product — from landing page to deployed MVP with payment integration, QA testing, and post-deploy canary monitoring. Handles code generation, deployment, database setup, authentication, Stripe/payment integration, systematic QA protocol, and production health scoring. Use when the user needs to build something, deploy a product, set up payments, create a landing page, or says 'build this', 'deploy', 'create MVP', 'set up payments', or 'ship it'.
gotcha-summarizer
lian-yang/gotcha-summarizer
Automatically summarizes technical lessons learned from conversations into docs/gotchas/. Supports 18+ programming languages with confidence scoring. Use at the end of conversations to capture: (1) Frontend/Backend bugs and root causes, (2) Framework issues (React/Vue/Next.js/Nuxt/Databases/APIs), (3) Code quality improvements (precision, caching, concurrency, etc.), (4) Performance optimization insights, (5) Testing/CI/CD/Git issues, (6) Any technical lessons worth documenting. Features: three-layer classification (Domain → Category → File), fuzzy duplicate detection, i18n support (zh/en), multi-code block grouping, error tracking statistics.
pyhealth
jackspace/claudeskillz
Comprehensive healthcare AI toolkit for developing, testing, and deploying machine learning models with clinical data. This skill should be used when working with electronic health records (EHR), clinical prediction tasks (mortality, readmission, drug recommendation), medical coding systems (ICD, NDC, ATC), physiological signals (EEG, ECG), healthcare datasets (MIMIC-III/IV, eICU, OMOP), or implementing deep learning models for healthcare applications (RETAIN, SafeDrug, Transformer, GNN).
review
johnlindquist/claude
Centralizes persona-driven code reviews (Fowler, Torvalds, Carmack, React core, etc.) so Claude can pick or combine expert viewpoints when the user asks for a code review or perspective-specific critique.
testing
verygoodopensource/vgv-ai-flutter-plugin
Best practices for Dart unit tests, Flutter widget tests, and golden file tests.
testing-library
claude-dev-suite/claude-dev-suite
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junit
full-stack-skills/testing-skills
Provides comprehensive guidance for JUnit testing framework including test annotations, assertions, test lifecycle, and best practices. Use when the user asks about JUnit, needs to write Java unit tests, use JUnit annotations, or configure JUnit for Java projects.
playwright-testing
mhagrelius/dotfiles
Use when writing, debugging, or reviewing Playwright tests for web apps; before writing test code; when tests are flaky, slow, or brittle; when seeing timeout errors, element not found, or race conditions; when using getByRole, locators, or assertions
assessing-external-test-risk
streamlit/streamlit
Assesses whether branch or PR changes are high-risk for externally hosted or embedded Streamlit usage and recommends whether external e2e coverage with `@pytest.mark.external_test` is needed. Use during code review, PR triage, or test planning when changes touch routing, auth, websocket/session behavior, embedding, assets, cross-origin behavior, SiS/Snowflake runtime, storage, or security headers.
godot
randroids-dojo/godot-claude-skills
Develop, test, build, and deploy Godot 4.x games. Includes GdUnit4 for GDScript unit tests and PlayGodot for game automation and E2E testing. Supports web/desktop exports, CI/CD pipelines, and deployment to Vercel/GitHub Pages/itch.io.
unit-testing-test-generate
rmyndharis/antigravity-skills
Generate comprehensive, maintainable unit tests across languages with strong coverage and edge case focus.
abap-unit-testing
likweitan/abap-skills
Help with ABAP Unit testing including test class setup, assertions, test doubles, mocking frameworks, dependency injection, CDS test environments, SQL test environments, RAP BO test doubles, and test fixtures. Use when users ask about ABAP unit tests, test classes, test methods, CL_ABAP_UNIT_ASSERT, test doubles, mocking, CDS test environment, SQL test environment, RAP testing, ABAP test injection, test seams, behavior-driven testing, TDD in ABAP, test isolation, or writing automated tests for ABAP code. Triggers include "write a unit test", "create test class", "mock a dependency", "test a CDS view", "test a RAP BO", "test double", "assertion", "test fixture", "test isolation", or "ABAP unit".
vitest
claude-dev-suite/claude-dev-suite
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kotlin-testing
pluginagentmarketplace/custom-plugin-kotlin
Kotlin testing - JUnit 5, MockK, Kotest, coroutine testing
accessibility-skill
lambdatest/agent-skills
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rust-testing
full-stack-skills/rust-skills
Design, implement, and validate Rust tests, including unit, integration, doctest, compile-fail, property, fuzz, benchmark, coverage, async, concurrency, process, daemon, IPC, terminal, platform, and hardware-facing test strategies. Use when users ask for Rust test architecture, flaky-test diagnosis, coverage gates, benchmarks, trybuild, cargo-nextest, real-process tests, or failure-path verification.
mobile-use-setup
minitap-ai/mobile-use
Interactive setup wizard for Minitap mobile-use SDK. USE WHEN user wants to set up mobile automation, configure mobile-use SDK, connect iOS or Android devices, or create a new mobile testing project.
threejs-spectral-ocean
scottstts/threejs-awesome-graphics-agent-skills
Build large procedural oceans and coast transitions in Three.js. Use for WebGPU/TSL FFT oceans, multi-cascade wavelength bands, hybrid FFT plus Gerstner clear-water oceans, coastal breakers, signed-distance coastlines, shallow-water swash films, wet-sand transitions, stylized above/below surface optics, permanently submerged Snell-window views, total internal reflection, forward-refracted structures through an interface, pixel-footprint spectral LOD, aquatic perspective, caustic god rays, choppy displacement, spectral derivatives, Jacobian whitecaps, windrow and temporal foam, analytic sky reflection, underwater absorption, crest scatter, and GPU validation.
tdd
eszxcvfd/skills
Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.
ts-testing
johnlindquist/claude
Design, implement, and maintain high‑value TypeScript test suites using popular JS/TS testing libraries. Use this skill whenever the user is adding tests, debugging failing tests, or refactoring code that should be covered by tests.
nextjs-vitest
tenkoh/skills
Set up Vitest testing environment for Next.js projects
vitest
liangmiqwq/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.
ask-questions-if-underspecified
oimiragieo/agent-studio
Ask the minimum clarifying questions before implementation when requirements are ambiguous or missing crucial details
cypress
full-stack-skills/testing-skills
Provides comprehensive guidance for Cypress end-to-end testing including commands, assertions, component testing, CI/CD integration, and best practices. Use when the user asks about Cypress, needs to write E2E tests, component tests, or configure Cypress for testing.
mutation-testing
jonmumm/skills
Run and interpret Stryker mutation testing; kill survivors to reach ≥95% score. Use when running mutation tests, setting up Stryker, interpreting survivors, or verifying test quality after TDD.
messaging-testing-rabbitmq
claude-dev-suite/claude-dev-suite
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qdrant-model-migration
github/awesome-copilot
Guides embedding model migration in Qdrant without downtime. Use when someone asks 'how to switch embedding models', 'how to migrate vectors', 'how to update to a new model', 'zero-downtime model change', 'how to re-embed my data', or 'can I use two models at once'. Also use when upgrading model dimensions, switching providers, or A/B testing models.
premortem
julianobarbosa/claude-code-skills
Run a premortem on any plan, launch, product, hire, pricing change, strategy, or high-stakes decision. Uses Gary Klein's prospective-hindsight method — assume it already failed at a future date and work backward to surface every plan-specific cause, then produce a revised plan, mitigations, early-warning signals, and a pre-launch checklist. USE WHEN premortem this, run a premortem, what could kill this, future-proof this, stress test this plan, what am I missing here, find the blind spots, what could go wrong, am I missing anything, poke holes in this, where will this break, before I commit to this. NOT FOR adversarial attack on an arbitrary idea or argument (use RedTeam), current-state multi-perspective debate (use Council), network/system vulnerability testing (use Security), or simple feedback/factual questions. DO trigger when someone has a concrete plan or commitment where the cost of being wrong is high and the decision is still changeable.
modern-python
oimiragieo/agent-studio
Modern Python tooling best practices using uv, ruff, ty, and pytest. Mandates the Trail of Bits Python coding standards for project setup, dependency management, linting, type checking, and testing. Based on patterns from trailofbits/cookiecutter-python.
pm-assumption-mapping
majesticlabs-dev/majestic-marketplace
Assumption mapping and product hypothesis testing frameworks for validating product ideas.
docker-testcontainers
full-stack-skills/docker-skills
Guidance for Testcontainers — running Docker containers in automated integration tests. Covers Java (@Testcontainers, @Container, PostgreSQL/Redis/Kafka/Elasticsearch), Python (testcontainers-python with pytest), container lifecycle management (singleton, reuse), CI/CD integration (Docker-in-Docker, Ryuk), Testcontainer best practices, and database migration testing. Use when the user asks about testcontainers, integration testing with Docker, database testing, Java testcontainers, Python testcontainers, or needs to test with real Docker services. 使用场景：testcontainers、集成测试、docker 测试、数据库测试、Java Testcontainers、Python Testcontainers.
landing-pages
flitzrrr/frontend-design-skills
Conversion-oriented page structure, CTA design, above-the-fold optimization, page types, and A/B testing for maximum conversion rates.
dotnet-testing-complex-object-comparison
kevintsengtw/dotnet-testing-agent-skills
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e2e
helderberto/agent-skills
Write end-to-end tests for user flows using Cypress. Use when user asks to "write e2e tests", "/e2e", "add Cypress tests", or wants to test a user flow end-to-end. Don't use for unit tests, component tests, or projects using Playwright, Puppeteer, or other non-Cypress frameworks.
threejs-atmosphere-aerial-perspective
scottstts/threejs-awesome-graphics-agent-skills
Implement physically motivated sky and aerial-perspective systems in Three.js. Use for planetary atmospheres, ground-to-space transitions, Rayleigh/Mie scattering, precomputed LUTs, depth-based transmittance and inscattering, sun/moon discs, and atmosphere-aware lighting.
pinchtab-dev
pinchtab/pinchtab
Develop and contribute to the PinchTab project. Use when working on PinchTab source code, adding features, fixing bugs, running tests, or preparing PRs. Triggers on "work on pinchtab", "pinchtab development", "contribute to pinchtab", "fix pinchtab bug", "add pinchtab feature".
