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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testing
bsene/skills
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detox-mobile-test
dengineproblem/agents-monorepo
Эксперт Detox тестирования. Используй для React Native E2E tests и mobile automation.
workers-ci-cd
secondsky/claude-skills
Complete CI/CD guide for Cloudflare Workers using GitHub Actions and GitLab CI. Use for automated testing, deployment pipelines, preview environments, secrets management, or encountering deployment failures, workflow errors, environment configuration issues.
testing-unit
yonatangross/orchestkit
Unit testing patterns for isolated business logic tests — AAA pattern, parametrized tests (test.each, @pytest.mark.parametrize), fixture scoping (function/module/session), mocking with MSW/VCR at network level, and test data management with factories (FactoryBoy, faker-js). Use when writing unit tests, setting up mocks, structuring test data, optimizing test speed, choosing fixture scope, or reducing test boilerplate. Covers Vitest, Jest, pytest.
playwright-api
microsoft/playwright
Explains how to add playwright API methods.
remote-tests
openai/codex
Testing against remote executors in integration tests.
integration-tests
openai/openai-agents-js
Run the integration-tests pipeline that depends on a local npm registry (Verdaccio). Use when asked to execute integration tests or local publish workflows in this repo.
storybook-stories
oakoss/agent-skills
Writes and maintains Storybook stories and interaction tests using CSF3 format. Covers component stories, play functions, visual regression testing with Chromatic, and accessibility testing. Use when creating component documentation, writing interaction tests, debugging test failures, configuring visual snapshots, or updating story structure. Use for CSF3, play functions, userEvent, Testing Library queries, Chromatic configuration, autodocs, MDX.
golang-best-practices
difyz9/golang-best-practices
Comprehensive Go/Golang development best practices covering project structure, error handling, concurrency, testing, performance optimization, and code quality. Use this skill when writing Go code, refactoring Go projects, setting up new Go applications, implementing Go patterns, optimizing Go performance, or reviewing Go codebases. Triggers include Go file extensions (.go), mentions of goroutines/channels, Go modules, or requests for Go-specific guidance.
testing-patterns
blogic-cz/blogic-marketplace
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.
cdata-cli
cdatasoftware/cli-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.
dogfood
redf0x1/camofox-browser
QA testing workflow for CamoFox Browser — systematic testing with console capture, error detection, and Playwright tracing. Use when the user needs to test a web application, perform QA validation, do exploratory testing, or verify web app behavior. Triggers include "test this website", "QA", "dogfood", "exploratory testing", "find bugs", or any request to systematically test a web application.
durable-objects
cloudflare/cloudflare-docs
Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest.
corroboration-skill-builder
garethmanning/education-agent-skills
Build students' capacity to compare accounts across multiple historical sources — identifying agreements, contradictions, and gaps. Use when students treat individual documents as complete answers rather than partial perspectives.
chrome
johnlindquist/claude
Browser automation using Puppeteer or Playwright. Use for web testing, screenshots, form filling, and automated browser interactions.
patrol-e2e-testing
evanca/flutter-ai-rules
Use when writing E2E/integration tests, testing native interactions like permissions or system dialogs, capturing UI regressions, or validating cross-platform behavior (Patrol 4.x).
webpack-plugin-authoring
pproenca/dot-skills
Writing webpack 5 plugins — hook selection (compiler vs compilation, tap vs tapAsync, processAssets stages), the asset pipeline (emitAsset, source classes, info metadata, source maps), watch-mode and persistent caching (file/context/missing/buildDependencies), plugin lifecycle (constructor purity, multi-compiler isolation, shutdown cleanup), schema-utils validation, WebpackError reporting, jest-worker parallelism, and compatibility patterns (compiler.webpack namespace, peerDependencies, getCompilationHooks WeakMap). Patterns are drawn from production plugins like mini-css-extract-plugin, terser-webpack-plugin, compression-webpack-plugin, and Next.js's webpack plugins. Trigger when writing, reviewing, or debugging webpack 5 plugins — even if the user doesn't explicitly mention "best practices" — anytime an `apply(compiler)` method is being written, hooks are being tapped, or a plugin imports from `webpack-sources`, the rules in this skill apply.
dotnet-integration-testing
wshaddix/dotnet-skills
Testing with real infrastructure. WebApplicationFactory, Testcontainers, Aspire, fixtures.
evaluating-llms
ancoleman/ai-design-components
Evaluate LLM systems using automated metrics, LLM-as-judge, and benchmarks. Use when testing prompt quality, validating RAG pipelines, measuring safety (hallucinations, bias), or comparing models for production deployment.
sap-commerce-cloud
emenowicz/sap-commerce-skill
Provides comprehensive SAP Commerce Cloud (formerly Hybris) development guidance including type system modeling, service layer architecture, ImpEx data management, FlexibleSearch queries, OCC API customization, Composable Storefront (Spartacus/Angular), B2C/B2B accelerator patterns, WCMS content management, CCv2 cloud deployment, SAP BTP/Kyma integration, CronJobs, business processes, Solr search, promotions, caching, SmartEdit, Backoffice configuration, and testing patterns. Use when the user asks about "SAP Commerce Cloud", "SAP Commerce", "Hybris", "create SAP Commerce extensions", "define item types in items.xml", "write ImpEx scripts", "implement facades/services/DAOs", "customize OCC REST APIs", "work with FlexibleSearch queries", "customize B2C or B2B accelerators", "SAP Commerce B2B", "configure Spring beans", "create CronJobs or scheduled tasks", "define business processes or order flows", "configure Solr search or indexing", "set up promotions or coupons", "configure caching", "customize Backoffice", "SAP Commerce WCMS", "SAP Commerce CMS", "SAP Commerce integration", "integrate Composable Storefront or Spartacus", "customize Angular CMS components in Spartacus", "deploy to CCv2 or SAP Commerce Cloud public cloud", "configure manifest.json for CCv2", "integrate SAP BTP or Kyma with SAP Commerce", "customize SmartEdit", "write unit or integration tests for SAP Commerce", or asks about troubleshooting SAP Commerce issues.
opensearch-function-scoring-algorithms
pproenca/dot-skills
Search relevance and ranking on OpenSearch/Elasticsearch for a two-sided marketplace — candidate retrieval (hybrid BM25 + kNN, RRF, two-tower EBR), base relevance (BM25F, multi_match, LambdaMART), quality signals (Wilson lower bound, Bayesian average, rank_feature saturation/sigmoid), personalization (listing/user/session embeddings), spatial/temporal decay (gauss/exp), marketplace balance (conversion-weighted ranking, supply fairness, Pareto multi-objective), bias correction (IPS, click models, Thompson sampling), empirical evaluation (judgment sets, NDCG, ablation, A/B sizing, CUPED, regression suites), and diversity (MMR, DPP, max-per-host). Triggers on function_score, rank_feature, script_score, kNN, hybrid query, learning-to-rank, two-sided ranking, exposure fairness, NDCG, A/B testing, judgment set construction, ranking ablation, or "why is my OpenSearch ranking bad". Applies to Elasticsearch too — same APIs.
k6-load-testing
sickn33/agentic-awesome-skills
Comprehensive k6 load testing skill for API, browser, and scalability testing. Write realistic load scenarios, analyze results, and integrate with CI/CD.
browser-harness
browser-use/browser-harness
Always use browser-harness for any web interaction: automation, scraping, testing, or site/app work.
go
laguagu/claude-code-nextjs-skills
Opens the running app in a browser and verifies recent UI changes actually work. Use whenever the user wants a quick smoke test or sanity check of recent work, or says "go", "open in browser", "check in browser", "test your work", "make sure it works", "smoke test", "verify", "did it actually work", "make sure the form/page works", "check the form submits", "works on mobile" — even when they don't explicitly ask for browser testing. Also activates implicitly when the user appends "...and make sure it works" to a UI request. Skips design critique; for that, use go-ui.
testing-pyramid
rrezartprebreza/spring-boot-skills
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openai-frontend-design
fcakyon/claude-codex-settings
Use for new frontend applications, dashboards, games, creative websites, hero sections, and visually driven UI from scratch, or when the user explicitly asks for a redesign/restyle/modernization. Builds from clean, airy, high-taste, readable image-generated concept design with section-specific references, faithful implementation, and browser testing.
e2e-testing
hairyf/skills
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agent-browser
bmad-labs/skills
Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, test web applications, or extract information from web pages.
spree-testing
spree/agent-skills
Use when the user is writing or running automated tests for a Spree app — model specs, controller specs, API integration tests, admin feature specs, factories, fixtures. Covers RSpec + Factory Bot + Capybara (Spree's stack — NOT Minitest + fixtures), the spree_dev_tools gem, pulling in Spree's own factories, the shared `API v3 Store` context, stub_authorization!, wait_for_turbo, and common Spree testing gotchas. Common phrasings include "test my Spree model", "Spree spec", "Factory Bot factories from Spree", "spree_dev_tools", "include_context API v3 Store", "stub_authorization", "wait_for_turbo", "Spree test setup".
tradingview-mcp
atilaahmettaner/tradingview-mcp
AI Trading Intelligence — live prices, 30+ technical indicators, backtesting (6 strategies), walk-forward overfitting detection, trade logs, equity curves, Reddit sentiment, news, and multi-market screener. Supports stocks, crypto, ETFs, indices, Turkish (BIST), and Egyptian (EGX) markets.
playwright-bdd-step-definitions
thebushidocollective/han
Use when creating step definitions with Given, When, Then, using createBdd() for step functions, implementing Page Object Model patterns, and sharing fixtures between steps.
mitmproxy-mcp
moha-abdi/mitmproxy-mcp
Analyze, intercept, and replay HTTP/HTTPS traffic through mitmproxy. Gives you 20 MCP tools for traffic analysis, request replay, interception control, and proxy configuration. Use when debugging APIs, testing security, or understanding how an application talks to its backend.
feature-image
shpigford/skills
Generate a branded social media image announcing a new feature or update. Analyzes git history, auto-detects brand from codebase (Tailwind, CSS vars, design tokens), replicates UI elements, and captures via Playwright. Use when the user wants to create an announcement image, says 'feature image,' 'announcement graphic,' 'social image for feature,' or wants to visually announce a code change.
reviewing-python-libraries
wdm0006/python-skills
Comprehensively reviews Python libraries for quality across project structure, packaging, code quality, testing, security, documentation, API design, and CI/CD. Provides actionable feedback and improvement recommendations. Use when evaluating library health, preparing for major releases, or auditing dependencies.
fastapi-endpoint
davila7/claude-code-templates
Plan and build production-ready FastAPI endpoints with async SQLAlchemy, Pydantic v2 models, dependency injection for auth, and pytest tests. Uses interview-driven planning to clarify data models, authentication method, pagination strategy, and caching before writing any code.
pytest
prowler-cloud/prowler
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qe-mobile-testing
proffesor-for-testing/agentic-qe
Comprehensive mobile testing for iOS and Android platforms including gestures, sensors, permissions, device fragmentation, and performance. Use when testing native apps, hybrid apps, or mobile web, ensuring quality across 1000+ device variants.
writing-go-tests
sammcj/agentic-coding
Applies current Go testing best practices. Use when writing or modifying Go test files or advising on Go testing strategies.
playwright
julianobarbosa/claude-code-skills
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.
rust-sota-arsenal
terrylica/cc-skills
Reference guide for state-of-the-art Rust tooling across refactoring, profiling, benchmarking, testing, and SIMD optimization. Use whenever the.
chrome-devtools
laguagu/claude-code-nextjs-skills
Tests in real browsers via Chrome DevTools MCP. Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, capture console errors, analyze network requests, profile performance (LCP/CLS/INP), or verify visual output with real runtime data. Complements Playwright — use this for live debugging and performance work, Playwright for stable E2E test suites.
testing-strategies
miles990/claude-software-skills
Unit, integration, E2E testing and TDD practices
triz
athola/claude-night-market
Applies TRIZ cross-domain analogical reasoning to find solutions from adjacent fields. Use when stuck on a problem and needing inventive perspectives.
validation-testing
josiahsiegel/claude-plugin-marketplace
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pdk-test
mulesoft/mulesoft-dx
Write and run integration tests for custom Flex Gateway policies using the `pdk-test` framework — Docker-based, real Flex Gateway routing, `#[pdk_test]` macro, `TestComposite` orchestration, `HttpMock` / `GrpcBin` backends, `reqwest` assertions. Use whenever the user mentions "PDK integration test", "pdk-test", "functional test PDK", "#[pdk_test]", "TestComposite", "FlexConfig", "tests/requests.rs", "make test", or asks "how do I test my policy against real Flex", "how do I set up Docker-based tests for PDK", "why does my pdk-test timeout", "how do I mock a backend in integration tests".
pdk-templates
mulesoft/mulesoft-dx
Vetted, compilable Rust templates for common Flex Gateway Policy Development Kit (PDK) features — JWT validation/generation, OAuth2 introspection, header/body manipulation, body streaming, rate limiting, spike control, CORS, IP filtering, JSON/XML validators, HTTP outbound calls, gRPC, DataWeave evaluation, caching, distributed locks, worker variables, request data, control flow, contracts, data storage, timers, logging, metadata, policy violations, stop_iteration, outbound policies, and PDK unit testing. Use whenever the user asks "how do I X in PDK?", "show me a PDK template for Y", "PDK Rust snippet for Z", "JWT template", "rate limit template", "header manipulation example", "PDK gRPC", "PDK DataWeave", or any prompt mapping to one of the 30 template files under templates/. Read the matching file and adapt it into the user's `src/lib.rs` (and companion files for multi-file features). For project scaffolding, build, and publish lifecycle, defer to `develop-pdk-policy`.
pdk-unit
mulesoft/mulesoft-dx
Write and run unit tests for custom Flex Gateway policies built with the Policy Development Kit (PDK) — wire up `src/tests/`, build a first `UnitTestBuilder` test, mock HTTP/gRPC upstreams with closures or `TraceBackend`, factor reusable `TestConfig` helpers, assert on responses / headers / violations, run with `make test` or `cargo test`, troubleshoot init-sleep races, authority mismatches, and feature-gate skew. Use whenever the user mentions "PDK unit test", "pdk-unit", "UnitTestBuilder", "test my policy", "cargo test PDK", "mock backend PDK", "Flex Gateway policy unit testing", `with_http_upstream_from_authority`, `with_entrypoint`, `TraceBackend`, or asks "how do I test a Flex Gateway policy", "how do I mock an upstream in pdk-unit", "why is my policy timer not firing in tests". For full `pdk-unit` API reference see `pdk-templates/templates/unit_testing.md`. For scaffolding / build / publish see `develop-pdk-policy`.
exunit-code-review
existential-birds/beagle
Reviews ExUnit test code for proper patterns, boundary mocking with Mox, and test adapter usage. Use when reviewing _test.exs files or test helper configurations.
openclaw-docker-e2e-authoring
openclaw/openclaw
Author OpenClaw Docker E2E and live provider Docker lanes.
email-1-variations-7
cold-iq/coldiq-s-gtm-skills
7 Email 1 variations from ColdIQ core framework plus Email 2 and Email 3 templates. Use when crafting the first email in a sequence, testing different opening structures, or building complete email cadences.
python-pytest-ops
0xdarkmatter/claude-mods
pytest testing patterns for Python. Triggers on: pytest, fixture, mark, parametrize, mock, conftest, test coverage, unit test, integration test, pytest.raises.
hypothesis-testing
laurigates/claude-plugins
Property-based testing with Hypothesis (Python). Use when testing with many inputs, verifying invariants, testing round-trips, or finding edge cases example tests miss.
ux-review
nickcrew/claude-cortex
Multi-perspective UX review combining usability heuristics, WCAG accessibility checks, and interaction design analysis. Use when reviewing UI components before release, evaluating user flows for usability issues, conducting design critiques, or auditing accessibility compliance.
analytics
infrasity-labs/dev-gtm-claude-skills
When the user wants to set up, improve, or audit analytics tracking and measurement. Also use when the user mentions "set up tracking," "GA4," "Google Analytics," "conversion tracking," "event tracking," "UTM parameters," "tag manager," "GTM," "analytics implementation," "tracking plan," "how do I measure this," "track conversions," "attribution," "Mixpanel," "Segment," "are my events firing," or "analytics isn't working." Use this whenever someone asks how to know if something is working or wants to measure marketing results. For A/B test measurement, see ab-testing.
android-emulator-skill
fluxxion82/android-emulator-skill
Production-ready scripts for Android app testing, building, and automation. Provides semantic UI navigation, build automation, accessibility testing, and emulator lifecycle management. Optimized for AI agents with minimal token output. Android equivalent of ios-simulator-skill.
active-directory-attacks
zebbern/claude-code-guide
This skill should be used when the user asks to "attack Active Directory", "exploit AD", "Kerberoasting", "DCSync", "pass-the-hash", "BloodHound enumeration", "Golden Ticket", "Silver Ticket", "AS-REP roasting", "NTLM relay", or needs guidance on Windows domain penetration testing.
Broken Authentication Testing
zebbern/claude-code-guide
This skill should be used when the user asks to "test for broken authentication vulnerabilities", "assess session management security", "perform credential stuffing tests", "evaluate password policies", "test for session fixation", or "identify authentication bypass flaws". It provides comprehensive techniques for identifying authentication and session management weaknesses in web applications.
create_e2e_tests
shiplightai/agent-skills
Spec-driven E2E test creation: plan what to test through structured discovery phases, then scaffold a local Shiplight test project and write YAML tests by walking through the app in a browser.
comprehensive-unit-testing-with-pytest
oimiragieo/agent-studio
Aims for high test coverage using pytest, testing both common and edge cases.
bun
itechmeat/llm-code
Bun JavaScript/TypeScript runtime and all-in-one toolkit. Covers runtime, package manager, bundler, test runner, HTTP server, WebSockets, SQLite, S3, Redis, file I/O, shell scripting, FFI, Markdown parser. Use when running JS/TS with Bun, managing packages, bundling, testing, or using Bun-specific APIs. Keywords: bun, bunx, bun install, bun run, bun test, bun build, Bun.serve, Bun.file, bun:sqlite, Bun.markdown.
