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.
Sourced from real, public repositories — synced daily, never invented.
15 tools across six categories
13 of them never send your data anywhere
Free · No signup · No trial clock
SEE THE DIRECTORY
encore-go-testing
encoredev/skills
Write or run automated tests for Encore Go code with `encore test` and the standard library `testing` package. Covers isolated per-test databases, calling handlers directly, and `*testing.T` patterns.
311-frameworks-spring-jdbc
jabrena/plinth
Use when you need to write or review programmatic JDBC with Spring — including JdbcClient (Spring Framework 7+) as the default API, JdbcTemplate only where batch/streaming APIs require JdbcOperations, NamedParameterJdbcTemplate for legacy named-param code, parameterized SQL, RowMapper mapping to records, batch operations, transactions, safe handling of generated keys, DataAccessException handling, read-only transactions, streaming large result sets, and @JdbcTest slice testing. This should trigger for requests such as Review Java code for Spring JDBC (JdbcTemplate, JdbcClient, NamedParameterJdbcTemplate); Apply best practices for Spring JDBC data access in Java code; Detect and fix SQL injection risks in JDBC code; Improve transaction boundaries or exception handling for JDBC operations; Review JdbcClient usage in Spring Framework 7. Part of Plinth Toolkit
catalyst-functions
catalystbyzoho/agent-skills
Catalyst serverless functions — all 7 types (Basic I/O, Advanced I/O, Event, Cron, Job, Integration, Browser Logic), handler signatures, catalyst-config.json, Security Rules, API Gateway routing, file uploads, busboy, Express middleware, environment variables, function URL, and function testing. Requires MCP connection — check for CatalystbyZoho_* tools before any operation. Trigger on 'write a function', 'catalyst function', 'API Gateway', 'Security Rules', 'function not found', 'function returns 401', 'busboy', 'middleware', 'function URL', 'environment variable in function', 'duplicate CORS headers', 'CORS error in browser', 'Access-Control-Allow-Origin multiple values', 'function URL 404', 'execute suffix', 'function timeout', 'function hangs', or any function type question. Do NOT use for persistent servers, long-running processes, or Docker deployments — use catalyst-appsail instead.
exploiting-websocket-vulnerabilities
mukul975/anthropic-cybersecurity-skills
Testing WebSocket implementations for authentication bypass, cross-site
github-actions-pipeline-creator
patricio0312rev/skills
Creates comprehensive GitHub Actions CI/CD workflows for linting, testing, building, and deploying. Includes caching strategies, matrix builds, artifact handling, and failure diagnostics. Use for "GitHub Actions", "CI pipeline", "workflow automation", or "continuous integration".
landing-page-copy
rampstackco/claude-skills
Write landing page copy with attention to the hero, value proposition, social proof, objection handling, and conversion-focused CTAs. Use this skill whenever the user wants to write a landing page, sales page, hero section, or any conversion-focused web copy. Triggers on landing page, sales page, hero copy, value proposition, headline, subheadline, hero section, CTA copy, conversion copy, opt-in page, squeeze page. Also triggers when the user has a marketing campaign or product launch needing dedicated conversion copy. Use `cro-optimization` instead when the page already exists and the ask is to lift its conversion rate through testing rather than to write the copy.
ios-testing
pproenca/dot-skills
Testing practices for iOS 26 / Swift 6.2 clinic modular MVVM-C applications. Covers unit/UI/snapshot testing, protocol-based mocks, async actor isolation, and dependency-injected test architecture aligned with Domain protocols, App-target composition, and Data-owned I/O boundaries. Use when writing, reviewing, or refactoring tests for ios-* and swift-* clinic modules.
playwright-screenshot-inspector
curiositech/some_claude_skills
LLM-powered visual testing expert for automated screenshot capture, analysis, and UI verification using Playwright with multimodal AI inspection.
hono
pedronauck/skills
Efficiently develop Hono applications using Hono CLI. Supports documentation search, API reference lookup, request testing, and bundle optimization.
playwright-e2e-builder
davila7/claude-code-templates
Plan and build comprehensive Playwright E2E test suites with Page Object Model, authentication state persistence, custom fixtures, visual regression, and CI integration. Uses interview-driven planning to clarify critical user flows, auth strategy, test data approach, and parallelization before writing any tests.
fengge-wangmingtianya-perspective
rottenpen/fengge-wangmingtianya-perspective
峰哥亡命天涯视角（虚构版）：用“漂泊江湖+现实主义去魅+黑色幽默”的口吻点评情感/职场/人生困惑，擅长“先下结论再大白话解释”“坏事说成好事”的反转劝世，并在隐私、诽谤、网暴、违法、露骨色情等敏感请求上拒答但不出戏；适用于用户要求“用峰哥亡命天涯/峰哥的方式/从亡命天涯视角”回答、想听江湖味段子或旅途旁白的场景（触发词：峰哥亡命天涯、峰哥、亡命天涯、用峰哥的方式、从峰哥视角）。
webapp-testing
bobmatnyc/claude-mpm-skills
Comprehensive web application testing patterns with Playwright selectors, wait strategies, and best practices
appsec-expert
martinholovsky/claude-skills-generator
Elite Application Security engineer specializing in secure SDLC, OWASP Top 10 2025, SAST/DAST/SCA integration, threat modeling (STRIDE), and vulnerability remediation. Expert in security testing, cryptography, authentication patterns, and DevSecOps automation. Use when securing applications, implementing security controls, or conducting security assessments.
frappe-manager
lubusin/frappe-skills
Use Frappe Manager (FM) for Docker-based development and testing environments. Use when setting up local dev, running isolated tests, or managing agent-driven Frappe development workflows.
evaluation-harness
patricio0312rev/skills
Builds repeatable evaluation systems with golden datasets, scoring rubrics, pass/fail thresholds, and regression reports. Use for "LLM evaluation", "testing AI systems", "quality assurance", or "model benchmarking".
hypogenic
davila7/claude-code-templates
Automated hypothesis generation and testing using large language models. Use this skill when generating scientific hypotheses from datasets, combining literature insights with empirical data, testing hypotheses against observational data, or conducting systematic hypothesis exploration for research discovery in domains like deception detection, AI content detection, mental health analysis, or other empirical research tasks.
gpui-test
longbridge/gpui-component
Writing tests for GPUI applications. Use when testing components, async operations, or UI behavior.
browser-automation
martinholovsky/claude-skills-generator
Expert in browser automation using Chrome DevTools Protocol (CDP) and WebDriver. Specializes in secure web automation, testing, and scraping with proper credential handling, domain restrictions, and audit logging. HIGH-RISK skill due to web access and data handling.
security-expert
personamanagmentlayer/pcl
Expert-level application security, OWASP Top 10, penetration testing, and security best practices
e2e-test-builder
patricio0312rev/skills
Builds end-to-end browser tests for critical user flows using Playwright or Cypress. Includes selector strategies, test data management, page objects, and visual regression testing. Use for "E2E testing", "browser tests", "Playwright", or "Cypress tests".
axiom-swift-testing
charleswiltgen/axiom
Use when writing unit tests, adopting Swift Testing framework, making tests run faster without simulator, architecting code for testability, testing async code reliably, or migrating from XCTest - covers @Test/@Suite macros, #expect/#require, parameterized tests, traits, tags, parallel execution, host-less testing
move-unit-testing
mystenlabs/skills
Use when writing unit tests for Move smart contracts on Sui. Applies to test function naming, assertions, test attributes, context usage, and cleanup patterns. Use whenever user asks to write tests, add tests, or test a Move module.
421-frameworks-quarkus-testing-unit-tests
jabrena/plinth
Use when you need to write fast unit tests for Quarkus applications — including pure tests with @ExtendWith(MockitoExtension.class), @QuarkusTest with @InjectMock for full CDI mock replacement, @InjectSpy for partial CDI bean mocking, REST Assured for resource-focused tests, @ParameterizedTest with @CsvSource / @MethodSource, QuarkusTestProfile for test-specific configuration overrides, and naming conventions (*Test → Surefire, *IT → Failsafe). For framework-agnostic Java use @131-java-testing-unit-testing. This should trigger for requests such as Add or improve unit tests in a Quarkus project; Reduce slow @QuarkusTest usage with Mockito-first tests; Add @InjectSpy partial mocking or QuarkusTestProfile configuration in Quarkus tests; Convert repeated test methods to @ParameterizedTest with @CsvSource or @MethodSource; Write fast pure unit tests for Quarkus services. Part of Plinth Toolkit
rbac-policy-tester
patricio0312rev/skills
Creates comprehensive permission tests ensuring RBAC doesn't regress with test matrices, CI gating, and authorization coverage. Use for "RBAC testing", "permission tests", "authorization testing", or "access control tests".
jest-skill
lambdatest/agent-skills
>
front-end-testing
citypaul/.dotfiles
Behavior-driven UI testing patterns across Vitest Browser Mode, Playwright E2E evidence boundaries, and DOM Testing Library. Use when testing any front-end application, writing UI or end-to-end tests, querying DOM elements, simulating user interactions, or choosing the lightest harness that proves a browser-observable claim. For React-specific patterns, see the react-testing skill.
playwright-skill
dedalus-erp-pas/foundation-skills
Automatisation complète du navigateur et tests web avec Playwright. Détecte automatiquement les serveurs de développement, gère le cycle de vie des serveurs, écrit des scripts de test propres dans /tmp. Tester des pages, remplir des formulaires, capturer des screenshots, vérifier le responsive design, valider l'UX, tester les flux de connexion, vérifier les liens, déboguer des webapps dynamiques, automatiser toute tâche navigateur. À utiliser quand l'utilisateur veut tester des sites web, automatiser des interactions navigateur, valider des fonctionnalités web ou effectuer tout test basé sur le navigateur.
ln-831-oss-replacer
levnikolaevich/claude-code-skills
Replaces custom modules with OSS packages using atomic keep/discard testing. Use when migrating custom code to established libraries.
flutter-testing
dhruvanbhalara/skills
Define testing strategy, test pyramid, and pattern-based conventions (Golden Variants, State Matrix, Interaction Contracts). Use when establishing test architecture or choosing the right testing approach for a Flutter project.
422-frameworks-quarkus-testing-integration-tests
jabrena/plinth
Use when you need to write or improve integration tests for Quarkus — including @QuarkusTest, Dev Services for automatic container provisioning, Testcontainers via QuarkusTestResourceLifecycleManager, WireMock for external HTTP stubs, @QuarkusIntegrationTest for black-box testing against packaged artifacts, REST Assured, data isolation strategies (@TestTransaction vs @BeforeEach cleanup), and Maven Surefire/Failsafe three-tier split (*Test, *IT, *AT). This should trigger for requests such as Add or improve integration tests in a Quarkus project; Configure Testcontainers or Dev Services for Quarkus tests; Add WireMock stubs for external HTTP dependencies in Quarkus integration tests; Set up @QuarkusIntegrationTest for packaged artifact or native binary testing; Fix test data isolation or configure Maven Surefire/Failsafe split. Part of Plinth Toolkit
frontend-developer-skill
404kidwiz/claude-supercode-skills
Comprehensive frontend development specialist for building modern web applications with React, Vue, Angular, and modern tooling including state management, testing, and performance optimization
design-review
secondsky/claude-skills
7-phase frontend design review with accessibility (WCAG 2.1 AA), responsive testing, visual polish. Use for PR reviews, UI audits, or encountering contrast issues, broken layouts, accessibility violations, inconsistent spacing, missing focus states.
tiktok-app-marketing
upload-post/upload-post-larry-marketing-skill
Automate TikTok + Instagram slideshow marketing for any app or product. Researches competitors, generates AI images, adds text overlays, posts via Upload-Post (multi-platform in one API call), tracks analytics, and iterates on what works. Use when setting up TikTok marketing automation, creating slideshow posts, analyzing post performance, optimizing app marketing funnels, or when a user mentions TikTok growth, slideshow ads, or social media marketing for their app. Covers competitor research (browser-based), image generation, text overlays, multi-platform posting (Upload-Post API — TikTok + Instagram + more simultaneously), analytics tracking, hook testing, CTA optimization, conversion tracking with RevenueCat, and a full feedback loop that adjusts hooks and CTAs based on views vs conversions.
contract-testing-builder
patricio0312rev/skills
Implements API contract testing to ensure provider-consumer compatibility using Pact or similar tools. Prevents breaking changes with contract specifications and bi-directional verification. Use for "contract testing", "API contracts", "Pact", or "consumer-driven contracts".
integration-test-builder
patricio0312rev/skills
Creates integration tests for API endpoints with database flows, including test harness setup, fixtures, setup/teardown, database seeding, and CI-friendly strategies. Use for "integration testing", "API tests", "database tests", or "test harness".
Playwright Browser Automation
ovachiever/droid-tings
Complete browser automation with Playwright. Auto-detects dev servers, writes clean test scripts to /tmp. Test pages, fill forms, take screenshots, check responsive design, validate UX, test login flows, check links, automate any browser task. Use when user wants to test websites, automate browser interactions, validate web functionality, or perform any browser-based testing.
521-frameworks-micronaut-testing-unit-tests
jabrena/plinth
Use when you need to write unit tests for Micronaut applications — Mockito-first with @ExtendWith(MockitoExtension.class), @MicronautTest with @MockBean, HttpClient @Client(/) assertions, @Property overrides, @ParameterizedTest, and *Test vs *IT naming. For framework-agnostic Java use @131-java-testing-unit-testing. This should trigger for requests such as Add or improve unit tests in a Micronaut project; Reduce unnecessary @MicronautTest usage with Mockito-first tests; Write Mockito-first unit tests for Micronaut services; Mock Micronaut bean collaborators in unit tests; Review fast Micronaut tests without application context. Part of Plinth Toolkit
explore-unknowns
dzhng/skills
Guide the user through a quadrant walk that maps the unknowns of a task — open by listing the known knowns, then work through known unknowns, unknown knowns, and unknown unknowns one stage at a time, ending with a complete four-quadrant map in the user's hands. Use when a request is ambiguous or underspecified, the codebase or domain is unfamiliar, the user will "know it when they see it", a reference implementation must be understood before porting, mid-build deviations from the plan need capturing, or a finished change needs buy-in or verified understanding before merge. Pairs with [write-spec](../write-spec/SKILL.md) — walk the quadrants to burn off fog before slicing, and feed the finished map into the spec.
effect-ts
pproenca/dot-skills
Effect-TS library usage in TypeScript — Effect.gen generators, Schema.Struct/Schema.Class definitions, Layer/Context.Tag/Service patterns, Effect.pipe pipelines, Data.TaggedError/Data.Class error types, Ref/Queue/PubSub/Deferred concurrency primitives, Match module, Config providers, Scope/Exit/Cause/Runtime patterns, or any code using Effect's typed error channel (E parameter). Trigger when writing, reviewing, debugging, or refactoring TypeScript code that uses Effect — when you see imports from `effect`, `effect/*`, or any `@effect/*` scoped package (schema, platform, sql, opentelemetry, cli, cluster, rpc, vitest). Also trigger when the user asks about Effect patterns, migration from Promises/fp-ts/neverthrow to Effect, or how to structure an Effect application. Do NOT trigger for React's useEffect, Redux side effects, or general English usage of "effect" unless the context clearly involves the Effect-TS library.
522-frameworks-micronaut-testing-integration-tests
jabrena/plinth
Use when you need to write or improve integration tests for Micronaut — @MicronautTest, HttpClient, TestPropertyProvider with Testcontainers, transactional test mode where appropriate, and Maven Surefire/Failsafe splits for *Test, *Tests, *IT, and *AT. This should trigger for requests such as Add Micronaut integration tests with Testcontainers; Wire dynamic datasource or broker URLs for @MicronautTest; Write @MicronautTest integration tests with Testcontainers; Configure replacement beans for Micronaut integration tests; Review Micronaut integration test lifecycle and resources. Part of Plinth Toolkit
data-seeding-fixtures-builder
patricio0312rev/skills
Generates deterministic seed data for development and testing with factory functions, realistic fixtures, and database reset scripts. Use for "data seeding", "test fixtures", "database seeding", or "mock data generation".
prompt-regression-tester
patricio0312rev/skills
Compares old vs new prompts across test cases with diff summaries, stability metrics, breakage analysis, and fix suggestions. Use for "prompt testing", "A/B testing prompts", "prompt versioning", or "quality regression".
react-testing
citypaul/.dotfiles
React component testing patterns including components, hooks, context, and forms. Covers Vitest Browser Mode with vitest-browser-react and @testing-library/react. Use when testing React applications. For general UI testing patterns, see the front-end-testing skill.
tooluniverse-admet-prediction
mims-harvard/tooluniverse
Comprehensive ADMET (Absorption, Distribution, Metabolism, Excretion, Toxicity) profiling for drug candidates. Integrates ADMET-AI predictions, SwissADME drug-likeness, PubChemTox experimental toxicity, ChEMBL clinical data, Lipinski rule-of-five, and CYP interaction data. Use for drug-likeness assessment, BBB penetration, bioavailability, hepatotoxicity prediction, ADME/PK profiling, or screening compound libraries before lab testing.
e2e-testing
ai-dashboad/flutter-skill
AI-powered E2E testing for any app — Flutter, React Native, iOS, Android, Electron, Tauri, KMP, .NET MAUI. Connects via MCP to running apps so the agent can take screenshots, tap elements, enter text, scroll, inspect UI trees, and verify state with natural language. Use when the user wants to test an app's UI end-to-end, automate cross-platform testing, run smoke tests, validate form flows, or verify navigation without writing test code.
testing-for-email-header-injection
mukul975/anthropic-cybersecurity-skills
Tests web application email functionality (contact forms, password reset,
owasp-ai-testing
mastepanoski/claude-skills
AI trustworthiness testing using OWASP AI Testing Guide v1. Execute 32 test cases across 4 layers (Application, Model, Infrastructure, Data) with practical payloads and remediation.
e2e-studio-tests
supabase/supabase
Run e2e tests in the Studio app. Use when asked to run e2e tests, run studio tests, playwright tests, or test the feature.
pytest-code-review
existential-birds/beagle
Reviews pytest test code for async patterns, fixtures, parametrize, and mocking. Use when reviewing test_*.py files, checking async test functions, fixture usage, or mock patterns.
performing-csrf-attack-simulation
mukul975/anthropic-cybersecurity-skills
Testing web applications for Cross-Site Request Forgery vulnerabilities
integrate-midtrans-payments
veritrans/midtrans-agent-skills
Guides Midtrans payment gateway integrations end to end: product selection, implementation, debugging, review, and sandbox verification. Use when working with Snap checkout (popup, redirect, embed, mobile WebView), Core API, BI-SNAP, QRIS, virtual accounts, GoPay, GoPay tokenization, GoPayLater, ShopeePay, DANA, card and 3DS, Alfamart/Indomaret OTC, Payment Link, Subscription API and recurring billing, refunds, webhooks and HTTP notifications, signature verification, status polling, settlement, sandbox testing, go-live cutover, or AI-assisted payment integration for Indonesian merchants.
vscode-rest-client-generator
patricio0312rev/skills
Generates .http files for the VS Code REST Client extension from Express, Next.js, Fastify, or other API routes. Creates organized request files with variables, environments, and authentication. Use when users request "generate http files", "rest client requests", "create .http file", or "vscode api testing".
council
pedronauck/skills
Orchestrates multi-advisor council debates on high-impact architecture, technology, or product decisions. Dispatches 3-5 domain archetype subagents (pragmatic-engineer, architect-advisor, security-advocate, product-mind, devils-advocate, the-thinker) through opening statements, tensions, position evolution, and synthesis phases. Preserves dissent and delivers actionable recommendations with captured risks. Use when evaluating trade-offs, stress-testing a PRD or tech spec, resolving dilemmas with multiple viable options, or when a decision needs diverse expert perspectives. Don't use for simple yes/no questions, factual lookups, creative brainstorming without tradeoffs, or tasks where a single expert perspective suffices.
pennant-development
laravel/boost
Use when working with Laravel Pennant the official Laravel feature flag package. Trigger whenever the query mentions Pennant by name or involves feature flags or feature toggles in a Laravel project. Tasks include defining feature flags checking whether features are active creating class based features in `app/Features` using Blade `@feature` directives scoping flags to users or teams building custom Pennant storage drivers protecting routes with feature flags testing feature flags with Pest or PHPUnit and implementing A B testing or gradual rollouts with feature flags. Do not trigger for generic Laravel configuration authorization policies authentication or non Pennant feature management systems.
bun-test
daleseo/bun-skills
Configure Bun's built-in test runner with Jest-compatible APIs. Use when setting up testing infrastructure, writing unit/integration/snapshot tests, migrating from Jest, or configuring test coverage. 3-10x faster than Jest.
testing-library
jezweb/claude-skills
|
dbt-transformation-patterns
sickn33/agentic-awesome-skills
Production-ready patterns for dbt (data build tool) including model organization, testing strategies, documentation, and incremental processing.
junit-5-skill
lambdatest/agent-skills
>
solidity-development
pluginagentmarketplace/custom-plugin-blockchain
Master Solidity smart contract development with patterns, testing, and best practices
service-layer-extractor
patricio0312rev/skills
Refactors route handlers into service layer with clean boundaries, dependency injection, testability, and separation of concerns. Provides service interfaces, folder structure, testing strategy, and migration plan. Use when refactoring "fat controllers", "business logic", "service layer", or "architecture cleanup".
