2,372 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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vitest-testing
secondsky/claude-skills
Modern TypeScript/JavaScript testing with Vitest. Fast unit and integration tests, native ESM support, Vite-powered HMR, and comprehensive mocking. Use for testing TS/JS projects.
ecommerce-landing-page
nexscope-ai/ecommerce-skills
Audit and optimize e-commerce landing pages for conversion. CTA placement, trust signals, page structure, copy optimization, and A/B testing strategy for product pages, collection pages, and campaign landing pages.
python-cybersecurity-tool-development
mindrally/skills
Guidelines for building Python cybersecurity tools with secure coding practices, async scanning, and structured security testing.
python-testing
mindrally/skills
Expert in Python testing with pytest and test-driven development
api-contract-testing
aj-geddes/useful-ai-prompts
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remove-technical-debt
wondelai/skills
Guided journey from a large aged codebase everyone fears to touch to one that is safe to change, legible, bounded, and resilient - paid down in place without a rewrite. Orchestrates eight skills phase by phase - working-with-legacy-code, refactoring-patterns, clean-code, software-design-philosophy, clean-architecture, pragmatic-programmer, release-it, domain-driven-design - asking the user questions at every decision point and recording results in the project docs/ folder (TESTING.md, TECH-DEBT.md, REMOVE-TECHNICAL-DEBT-PLAN.md) so the journey resumes across sessions. Use when the user wants to tame a legacy codebase, pay down technical debt safely, avoid a big-bang rewrite, or says ''we are afraid to touch this code''. For a fresh prototype or vibe-coded app going to production, use improve-code-quality; for greenfield structure, use design-code-architecture; for a product-and-UX pass rather than code-only, use improve-app. For one framework in isolation, invoke that skill directly.
vitest
bobmatnyc/claude-mpm-skills
Vitest - Modern TypeScript testing framework with Vite-native performance, ESM support, and TypeScript-first design
game-qa
playableintelligence/game-creator
Game QA testing with Playwright — visual regression, gameplay verification, performance, and accessibility for browser games. Use when writing or running game tests, debugging test failures, or building QA infrastructure. This is the reference skill — use qa-game for the user-facing command.
llm-council
aiwithremy/claude-skills-llm-council
Run any question, idea, or decision through a council of 5 AI advisors who independently analyze it, peer-review each other anonymously, and synthesize a final verdict. Based on Karpathy's LLM Council methodology. MANDATORY TRIGGERS: 'council this', 'run the council', 'war room this', 'pressure-test this', 'stress-test this', 'debate this'. STRONG TRIGGERS (use when combined with a real decision or tradeoff): 'should I X or Y', 'which option', 'what would you do', 'is this the right move', 'validate this', 'get multiple perspectives', 'I can't decide', 'I'm torn between'. Do NOT trigger on simple yes/no questions, factual lookups, or casual 'should I' without a meaningful tradeoff (e.g. 'should I use markdown' is not a council question). DO trigger when the user presents a genuine decision with stakes, multiple options, and context that suggests they want it pressure-tested from multiple angles.
nestjs-clean-typescript
mindrally/skills
Clean NestJS API development with TypeScript following SOLID principles, modular architecture, and comprehensive testing practices.
api-security-testing
sickn33/agentic-awesome-skills
API security testing workflow for REST and GraphQL APIs covering authentication, authorization, rate limiting, input validation, and security best practices.
email-marketing
arnabbagxd/brand-building-skills
Build and run a full email marketing channel — list building, deliverability, segmentation, newsletter strategy, campaign types, A/B testing, and email design. Use when the user says "email marketing", "email strategy", "email list", "newsletter", "email campaigns", "email list building", "email deliverability", "email open rates", "email segmentation", "email design", "email calendar", "grow my email list", "email marketing plan", "broadcast emails", "email engagement", or wants to use email as a primary owned marketing channel beyond just automated flows.
java-testing
pluginagentmarketplace/custom-plugin-java
Test Java applications - JUnit 5, Mockito, integration testing, TDD patterns
create-evlog-adapter
hugorcd/evlog
Create a new built-in evlog adapter to send wide events to an external observability platform. Use when adding a new drain adapter (e.g., for Elasticsearch, Honeycomb, SigNoz, etc.) to the evlog package. Covers source code, build config, package exports, tests, e2e, and all documentation.
aso
arnabbagxd/brand-building-skills
Optimize an app's store listing for maximum visibility and downloads — keyword strategy, title and subtitle optimization, screenshots, preview videos, rating and review management, and A/B testing on the App Store (iOS) and Google Play (Android). Use when the user says "ASO", "app store optimization", "optimize my app listing", "improve app store ranking", "app store keywords", "app store screenshots", "app store rating", "Google Play optimization", "app visibility", "increase app downloads", "app store SEO", "app store conversion", "my app isn't getting downloads", or wants to improve how their app appears and converts in the App Store or Google Play.
web-security-testing
sickn33/agentic-awesome-skills
Web application security testing workflow for OWASP Top 10 vulnerabilities including injection, XSS, authentication flaws, and access control issues.
axiom-ai
charleswiltgen/axiom
Use when implementing, testing, or evaluating ANY Apple Intelligence, on-device AI, or speech-to-text feature. Covers Foundation Models, @Generable, LanguageModelSession, Tool protocol, eval suites, model-as-judge scoring, SpeechTranscriber, CoreML.
ui-ux-expert
martinholovsky/claude-skills-generator
Expert UI/UX designer specializing in user-centered design, accessibility (WCAG 2.2), design systems, and responsive interfaces. Use when designing web/mobile applications, implementing accessible interfaces, creating design systems, or conducting usability testing.
mobile-app-testing
aj-geddes/useful-ai-prompts
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api-testing
secondsky/claude-skills
HTTP API testing for TypeScript (Supertest) and Python (httpx, pytest). Test REST APIs, GraphQL, request/response validation, authentication, and error handling.
fastify-typescript
mindrally/skills
Guidelines for building high-performance APIs with Fastify and TypeScript, covering validation, Prisma integration, and testing best practices
security-pen-testing
alirezarezvani/claude-skills
Use when the user asks to perform security audits, penetration testing, vulnerability scanning, OWASP Top 10 checks, or offensive security assessments. Covers static analysis, dependency scanning, secret detection, API security testing, and pen test report generation.
test-automator
zhaono1/agent-playbook
Test automation framework expert for creating and maintaining automated tests. Use when user asks to write tests, automate testing, or improve test coverage.
electron-best-practices
jwynia/agent-skills
Guide AI agents through Electron app development with React including security patterns, type-safe IPC, React integration, packaging with code signing, and testing. Keywords: electron, electron-vite, electron-forge, contextBridge, IPC, security, react, packaging, code signing, notarization, playwright, desktop app.
fusion-devtools
equinor/fusion-skills
Use Fusion DevTools CLI (fdev) for API testing, token acquisition, service discovery, and person lookup during development. USE FOR: calling Fusion REST APIs, getting access tokens as JSON, discovering services and environments, resolving persons, PIM role activation. DO NOT USE FOR: modifying backend service code, deploying services, infrastructure changes, CI/CD pipeline configuration, or Service Bus operations.
qa-game
playableintelligence/game-creator
Add Playwright QA tests to a game — visual regression, gameplay verification, and performance. Use when the user says "add tests", "test my game", "add QA", "check for bugs", or "add visual regression tests". Do NOT use for manual playtesting or gameplay design.
jest
mindrally/skills
Jest testing best practices for JavaScript and TypeScript applications, covering test structure, mocking, and assertion patterns.
ux-principles
manutej/luxor-claude-marketplace
User research, usability heuristics, user psychology, accessibility, inclusive design, user testing, and UX metrics
browser-automation
davila7/claude-code-templates
Browser automation powers web testing, scraping, and AI agent interactions. The difference between a flaky script and a reliable system comes down to understanding selectors, waiting strategies, and anti-detection patterns. This skill covers Playwright (recommended) and Puppeteer, with patterns for testing, scraping, and agentic browser control. Key insight: Playwright won the framework war. Unless you need Puppeteer's stealth ecosystem or are Chrome-only, Playwright is the better choice in 202
using-n8n-mcp-skills
czlonkowski/n8n-skills
Use when building, editing, validating, testing, or debugging an n8n workflow through the n8n-mcp MCP server — designing a flow, configuring a node, writing an expression or Code node, wiring credentials, or fixing one that misbehaves. The entry-point skill for the n8n-mcp-skills pack: it routes you to the right specialist skill, gives working knowledge of every n8n-mcp tool from turn one, and states the rules that keep workflows from breaking in production. Always consult it first on any n8n, workflow, node, or automation task — even a quick one-off, and even when the user names no skill — because n8n's surface drifts between versions and the specialist skills prevent silent failures.
android-testing
new-silvermoon/awesome-android-agent-skills
Comprehensive testing strategy involving Unit, Integration, Hilt, and Screenshot tests.
parallel-agents
sickn33/agentic-awesome-skills
Multi-agent orchestration patterns. Use when multiple independent tasks can run with different domain expertise or when comprehensive analysis requires multiple perspectives.
pytest-patterns
manutej/luxor-claude-marketplace
Python testing with pytest covering fixtures, parametrization, mocking, and test organization for reliable test suites
playwright
bobmatnyc/claude-mpm-skills
Playwright modern end-to-end testing framework with cross-browser automation, auto-wait, and built-in test runner
perspective
bergside/awesome-design-skills
Spatial depth design with isometric views, vanishing points, and layered elements that guide attention through 3D-like realism.
general-best-practices
mindrally/skills
General software development best practices covering code quality, testing, security, performance, and maintainability across technology stacks
shopify-landing-page-builder
nexscope-ai/ecommerce-skills
High-converting landing pages — campaign pages, collection pages, seasonal promos, A/B testing
playwright-bot-bypass
greekr4/playwright-bot-bypass
This skill should be used when the user asks to "bypass bot detection", "avoid CAPTCHA", "stealth browser automation", "undetected playwright", "bypass Google bot check", "rebrowser-playwright", or needs to automate websites that detect and block bots.
qa-expert
zhaono1/agent-playbook
Quality assurance expert for testing strategies and quality gates. Use when planning test coverage, setting up QA processes, or improving quality standards.
adversarial-reviewer
alirezarezvani/claude-skills
Adversarial code review that breaks the self-review monoculture. Use when you want a genuinely critical review of recent changes, before merging a PR, or when you suspect Claude is being too agreeable about code quality. Forces perspective shifts through hostile reviewer personas that catch blind spots the author's mental model shares with the reviewer.
lightpanda
lightpanda-io/agent-skill
Lightpanda browser, drop-in replacement for Chrome-based browsing in any AI agent - faster and lighter for tasks without graphical rendering like data retrieval. Use it via MCP server, CLI fetch, or CDP with Playwright/Puppeteer — or run/save automations as deterministic, token-free replay scripts (PandaScript) via its own agent mode.
typescript-refactor
pproenca/dot-skills
TypeScript and TSX refactoring and modernization guidelines from a principal specialist perspective, current to TypeScript 6.0 and React 19. This skill should be used when refactoring, reviewing, or modernizing TypeScript or React/TSX code for type safety, compiler performance, and idiomatic patterns. Triggers on tasks involving type architecture, narrowing, generics, discriminated unions, error handling, React component and hook typing, or migration to modern TypeScript features (satisfies, using, const type parameters, inferred type predicates, isolatedDeclarations, erasable syntax, import attributes).
creating-reanimated-animations
estevg/skills
Generate React Native Reanimated animation code for React Native apps. Use when user asks to create, implement, or add animations in React Native — including transitions, gestures, scroll-linked effects, layout animations, layout transitions, entering/exiting animations, CSS animations, CSS transitions, shared element transitions, color animations, parallax, fade, slide, scale, spring, timing, decay, keyframes, worklets, accordion, bottom sheet, flip card, collapsing header, or any motion effect using react-native-reanimated. Also use for integrating react-native-gesture-handler with Reanimated, understanding worklets, animating between screens, testing animations with Jest, or checking which properties are animatable.
nestjs-testing-expert
shipshitdev/skills
NestJS testing mechanics with Jest — building testing modules, mocking providers and repositories, writing service and controller specs, and driving HTTP end-to-end tests through the real application. Use for any test touching a NestJS service, controller, guard, module, or API endpoint, including test-module setup, provider overrides, database fakes, and Supertest request flows.
ad-creative
alirezarezvani/claude-skills
When the user needs to generate, iterate, or scale ad creative for paid advertising. Use when they say 'write ad copy,' 'generate headlines,' 'create ad variations,' 'bulk creative,' 'iterate on ads,' 'ad copy validation,' 'RSA headlines,' 'Meta ad copy,' 'LinkedIn ad,' or 'creative testing.' This is pure creative production — distinct from paid-ads (campaign strategy). Use ad-creative when you need the copy, not the campaign plan.
langsmith-observability
orchestra-research/ai-research-skills
LLM observability platform for tracing, evaluation, and monitoring. Use when debugging LLM applications, evaluating model outputs against datasets, monitoring production systems, or building systematic testing pipelines for AI applications.
product-discovery
alirezarezvani/claude-skills
Use when validating product opportunities, mapping assumptions, planning discovery sprints, or testing problem-solution fit before committing delivery resources.
record-promo
playableintelligence/game-creator
Record an autonomous 50 FPS promo video of your game for social media. Use when the user says "record a video", "make a promo", "capture gameplay", "record gameplay footage", or "make a trailer for my game". Do NOT use for gameplay testing (use qa-game).
chrome-extension
pproenca/dot-skills
Chrome Extensions (Manifest V3) performance and code quality guidelines. Use when writing, reviewing, or refactoring Chrome extension code including service workers, content scripts, message passing, storage APIs, TypeScript patterns, and testing.
api-fuzzing-bug-bounty
sickn33/agentic-awesome-skills
Provide comprehensive techniques for testing REST, SOAP, and GraphQL APIs during bug bounty hunting and penetration testing engagements. Covers vulnerability discovery, authentication bypass, IDOR exploitation, and API-specific attack vectors.
demo-video
alirezarezvani/claude-skills
Use when the user asks to create a demo video, product walkthrough, feature showcase, animated presentation, marketing video, or GIF from screenshots or scene descriptions. Orchestrates playwright, ffmpeg, and edge-tts MCPs to produce polished video content.
playwright-automation
petrkindlmann/qa-skills
>-
e2e-testing-automation
aj-geddes/useful-ai-prompts
>
nestjs-expert
davila7/claude-code-templates
Nest.js framework expert specializing in module architecture, dependency injection, middleware, guards, interceptors, testing with Jest/Supertest, TypeORM/Mongoose integration, and Passport.js authentication. Use PROACTIVELY for any Nest.js application issues including architecture decisions, testing strategies, performance optimization, or debugging complex dependency injection problems. If a specialized expert is a better fit, I will recommend switching and stop.
ruby
mindrally/skills
Ruby development guidelines covering idiomatic code style, Ruby 3.x features, testing with RSpec, and best practices for building maintainable Ruby applications.
visual-regression-testing
aj-geddes/useful-ai-prompts
>
sumsub-integrate-websdk
sumsub/agent-skills
End-to-end recipe for adding Sumsub KYC to a website or web app via the Sumsub WebSDK. TRIGGER when the user asks to "integrate / embed / add Sumsub", "show the KYC widget", "add WebSDK", "verify users with Sumsub on the frontend", supplies an existing levelName they want to plug into a page, or asks how to wire up access tokens / lifecycle events / webhooks for Sumsub verification in an arbitrary project. Covers the whole loop — level setup, server-side access-token signing, snsWebSdk init (vanilla canonical, React recipe), client lifecycle events, token refresh, source-of-truth via webhooks + applicant GET, sandbox testing, go-live checklist. SKIP for building the level/questionnaire/POA-preset payload itself (use the sibling skills), or for backend-only API calls with no frontend (use `sumsub-api-generic`).
sumsub-manage-webhooks
sumsub/agent-skills
Manage Sumsub `clientWebhooks` (event subscriptions for applicantReviewed / applicantPending / kytTxn / etc.) — reads via `/resources/api/clientWebhooks`, writes via `/resources/api/agent/clientWebhooks`. **Sandbox only** — production webhooks must be created by a human directly in the Sumsub dashboard. TRIGGER when the user asks to "list / retrieve / show webhooks", "create / add / register a webhook", or "update / edit / change a webhook target / event list / secret / signature algorithm" against their sandbox tenant. SKIP for production webhook setup (refer the user to the dashboard), for unrelated webhook surfaces (Stripe / videoIdent / Fireblocks / NFC / partner-specific receive paths under `/resources/webhooks/...`), for testing one-off delivery (use the `inspectionCallbacks/testWebhook` endpoint directly), and for KYT-only webhook routing (that's managed in the Sumsub dashboard's KYT section). The public API does not expose delete or per-webhook delivery stats — for those, refer the user to the Sumsub dashboard UI.
playwright-pro
alirezarezvani/claude-skills
Production-grade Playwright testing toolkit. Use when the user mentions Playwright tests, end-to-end testing, browser automation, fixing flaky tests, test migration, CI/CD testing, or test suites. Generate tests, fix flaky failures, migrate from Cypress/Selenium, sync with TestRail, run on BrowserStack. 55 templates, 3 agents, smart reporting.
feng-ge-perspective
yixiajack/feng-ge-skill
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