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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selenium-automation
mindrally/skills
Expert guidance for browser automation and web testing using Selenium WebDriver with best practices for element location, waits, and test organization.
senior-security
alirezarezvani/claude-skills
Use when the user asks for STRIDE threat modeling, DREAD risk scoring, data-flow-diagram threat analysis, or a quick secret scan — or when a security request needs routing to the right specialist skill (pen-testing, incident response, cloud posture, red team, AI security, threat hunting, secure code review). This skill owns threat modeling; everything else routes to a sibling.
senior-qa
davila7/claude-code-templates
Comprehensive QA and testing skill for quality assurance, test automation, and testing strategies for ReactJS, NextJS, NodeJS applications. Includes test suite generation, coverage analysis, E2E testing setup, and quality metrics. Use when designing test strategies, writing test cases, implementing test automation, performing manual testing, or analyzing test coverage.
promptfoo-evaluation
daymade/claude-code-skills
Configures and runs LLM evaluation using Promptfoo framework. Use when setting up prompt testing, creating evaluation configs (promptfooconfig.yaml), writing Python custom assertions, implementing llm-rubric for LLM-as-judge, or managing few-shot examples in prompts. Triggers on keywords like "promptfoo", "eval", "LLM evaluation", "prompt testing", or "model comparison".
test-tagging
dotnet/skills
Analyzes test suites in any language and tags each test with standardized traits (positive, negative, critical-path, boundary, smoke, regression, integration, performance, security). Use when the user wants to categorize, audit, or label tests with traits. Works across .NET (MSTest/xUnit/NUnit/TUnit), Python (pytest), TS/JS (Jest/Vitest), Java, Go, Ruby, Rust, Swift, Kotlin, PowerShell, and C++ — auto-editing when the framework has canonical tag syntax, otherwise report-only. Do not use for writing new tests, running tests, or migrating frameworks.
jest-react-testing
manutej/luxor-claude-marketplace
Comprehensive React component testing with Jest and React Testing Library covering configuration, mocking strategies, async testing patterns, hooks testing, and integration testing best practices
V3 Core Implementation
ruvnet/ruflo
Core module implementation for claude-flow v3. Implements DDD domains, clean architecture patterns, dependency injection, and modular TypeScript codebase with comprehensive testing.
ilya-sutskever-perspective
alchaincyf/ilya-sutskever-skill
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go-testing
cxuu/golang-skills
Use when writing, reviewing, or improving Go test code — including table-driven tests, subtests, parallel tests, test helpers, test doubles, and assertions with cmp.Diff. Also use when a user asks to write a test for a Go function, even if they don't mention specific patterns like table-driven tests or subtests. Does not cover benchmark performance testing (see go-performance).
develop-web-game
openai/skills
Use when Codex is building or iterating on a web game (HTML/JS) and needs a reliable development + testing loop: implement small changes, run a Playwright-based test script with short input bursts and intentional pauses, inspect screenshots/text, and review console errors with render_game_to_text.
critique
neolabhq/context-engineering-kit
Comprehensive multi-perspective review using specialized judges with debate and consensus building
authoring-dags
astronomer/agents
Workflow and best practices for writing Apache Airflow DAGs. Use when creating a new DAG, write pipeline code, handling questions about DAG patterns and conventions or extending an existing DAG with a follow-up/downstream task. ANY request shaped like 'add a DAG named X', 'write a pipeline', 'add a task that runs after Y', or 'extend the DAG'. For testing and debugging DAGs, see the testing-dags skill.
testing
tursodatabase/turso
How to write tests, when to use each type of test, and how to run them. Contains information about conversion of `.test` to `.sqltest`, and how to write `.sqltest` and rust tests
senior-qa
alirezarezvani/claude-skills
Generates unit tests, integration tests, and E2E tests for React/Next.js applications. Scans components to create Jest + React Testing Library test stubs, analyzes Istanbul/LCOV coverage reports to surface gaps, scaffolds Playwright test files from Next.js routes, mocks API calls with MSW, creates test fixtures, and configures test runners. Use when the user asks to "generate tests", "write unit tests", "analyze test coverage", "scaffold E2E tests", "set up Playwright", "configure Jest", "implement testing patterns", or "improve test quality".
ci-cd-best-practices
mindrally/skills
CI/CD best practices for building automated pipelines, deployment strategies, testing, and DevOps workflows across platforms
n8n-workflow-lifecycle-official
n8n-io/skills
Use when starting, designing, organizing, finishing, or shipping an n8n workflow. Covers visual layout (sticky notes), descriptions that capture the *why*, node names, validation, testing, folders/projects, and publishing. Triggers on create_workflow_from_code, update_workflow, validate_workflow, publish_workflow, archive_workflow, "design", "lay out", "organize", "structure", "sticky", "describe this workflow", "ship", "deploy", "publish", "name this workflow", or any folder/project organization request.
testing-patterns
sickn33/agentic-awesome-skills
Jest testing patterns, factory functions, mocking strategies, and TDD workflow. Use when writing unit tests, creating test factories, or following TDD red-green-refactor cycle.
doc-coauthoring
sickn33/agentic-awesome-skills
This skill provides a structured workflow for guiding users through collaborative document creation. Act as an active guide, walking users through three stages: Context Gathering, Refinement & Structure, and Reader Testing.
wordpress-penetration-testing
sickn33/agentic-awesome-skills
Assess WordPress installations for common vulnerabilities and WordPress 7.0 attack surfaces.
testing-dags
astronomer/agents
Complex DAG testing workflows with debugging and fixing cycles. Use for multi-step testing requests like "test this dag and fix it if it fails", "test and debug", "run the pipeline and troubleshoot issues". For simple test requests ("test dag", "run dag"), the airflow entrypoint skill handles it directly. This skill is for iterative test-debug-fix cycles.
agent-evaluation
neolabhq/context-engineering-kit
Evaluate and improve Claude Code commands, skills, and agents. Use when testing prompt effectiveness, validating context engineering choices, or measuring improvement quality.
om-auto-continue-pr-loop
open-mercato/skills
Advanced om-auto-continue-pr for PRs started by om-auto-create-pr-loop — claims the PR, resumes from the first non-done PLAN.md Tasks row in an isolated worktree, keeps the per-step commit and checkpoint discipline (integration tests + screenshots for UI), runs the full gate at completion, keeps spec-only design PRs design-only (implementation ships on its own PR via om-auto-implement-spec), and preserves the run-folder and label contract. Use plain om-auto-continue-pr for simple runs.
flutter-testing
flutter/skills
Add Flutter unit tests, widget tests, or integration tests
penetration-testing
aj-geddes/useful-ai-prompts
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rstest-best-practices
rstackjs/agent-skills
Rstest best practices for project setup, configuration, CLI workflow, test writing, mocking, snapshot testing, DOM testing, coverage, multi-project setup, and CI integration. Use when setting up, writing, or reviewing Rstest tests and test projects. For systematic startup, build, runtime, logging, memory, or performance diagnosis, use rstest-debugging.
om-auto-create-pr-loop
open-mercato/skills
Advanced om-auto-create-pr for long, multi-step spec implementations needing resumability and strict step tracking — run folder (PLAN/HANDOFF/NOTIFY), one lean commit per Step, checkpoint verification every ~5 Steps with integration tests and UI screenshots, full gate at completion, ready labeled PR. Resumable via om-auto-continue-pr-loop. Use plain om-auto-create-pr for small fixes.
go-interfaces
cxuu/golang-skills
Use when defining or implementing Go interfaces, designing abstractions, creating mockable boundaries for testing, or composing types through embedding. Also use when deciding whether to accept an interface or return a concrete type, or using type assertions or type switches, even if the user doesn't explicitly mention interfaces. Does not cover generics-based polymorphism (see go-generics).
safe-action-testing
next-safe-action/skills
Use when writing tests for next-safe-action actions or hooks -- Vitest patterns for testing server actions directly, middleware behavior, hooks with React Testing Library, validation errors, and server errors
paid-ads-strategy
kostja94/marketing-skills
When the user wants to plan paid ads strategy, allocate ad budget, or choose paid channels. Also use when the user mentions "paid ads," "paid media," "PPC," "SEM," "web ads," "app ads," "TV ads," "CTV," "OOH," "banner ads," "ad network," "ad alliance," "Taaft ads," "Shopify App Store ads," "Google Ads," "Meta Ads," "PMF testing," "PMF validation," "test product-market fit with ads," "ad spend," "ad budget," "ROAS," "paid acquisition," "Quality Score," or "ad-to-page alignment." For Google Ads execution, use google-ads. For Meta Ads execution, use meta-ads. For landing page alignment, use landing-page-generator.
flutter-riverpod-expert
juparave/dotfiles
Expert knowledge in Flutter Riverpod state management (2025 best practices). Use when working with Riverpod, Flutter state management, AsyncNotifier, provider types, code generation with riverpod_generator, state synchronization, or when the user mentions data fetching, mutations, reactive state, performance optimization, or testing in Flutter apps. Covers AsyncNotifierProvider patterns, repository architecture, autoDispose, family providers, and common anti-patterns to avoid.
create-skill
neolabhq/context-engineering-kit
Guide for creating effective skills. This command should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations. Use when creating new skills, editing existing skills, or verifying skills work before deployment - applies TDD to process documentation by testing with subagents before writing, iterating until bulletproof against rationalization
test-prompt
neolabhq/context-engineering-kit
Use when creating or editing any prompt (commands, hooks, skills, subagent instructions) to verify it produces desired behavior - applies RED-GREEN-REFACTOR cycle to prompt engineering using subagents for isolated testing
roadmap
jezweb/claude-skills
Plan and execute entire application builds. Generates phased delivery roadmaps, then executes them autonomously — phase by phase, committing at milestones, deploying, testing, and continuing until done or stuck. Modes: plan (generate roadmap), start (begin executing), resume (continue from where you left off), status (show progress). Triggers: 'roadmap', 'start building', 'resume the build', 'keep going', 'build the whole thing', 'execute the roadmap', 'what phase are we on'.
go-style-core
cxuu/golang-skills
Use when working with Go formatting, line length, nesting, naked returns, semicolons, or core style principles. Also use when a style question isn't covered by a more specific skill, even if the user doesn't reference a specific style rule. Does not cover domain-specific patterns like error handling, naming, or testing (see specialized skills). Acts as fallback when no more specific style skill applies.
experience-lwc-design-generate
forcedotcom/sf-skills
Use when you need to create a brand new Lightning Web Component from a Figma design, a Product Requirements Document, or another design artifact — orchestrating the five-phase workflow (gather requirements → generate code → optimize → lint/format/compile → test) and stitching together the specialized skills for SLDS, LDS, base components, optimization, and testing. Use this skill whenever the user mentions building a new LWC from Figma, building an LWC from a PRD, generating an LWC from a design or screenshot, or migrating an Aura component as a fresh LWC build. DO NOT TRIGGER when refactoring an existing LWC (use experience-lwc-generate), for Aura → LWC in-place migration (out of scope for this skill), for standalone SLDS token or styling work (use design-systems-slds-apply), or for standalone data-layer work (use experience-lds-best-practices-apply or experience-lds-data-requirements-generate).
filament-pro
marcelorodrigo/agent-skills
Build Laravel admin panels with Filament v5. Use for creating resources, forms, tables, widgets, and testing admin interfaces with Livewire v4.
tdd-guide
alirezarezvani/claude-skills
Test-driven development skill for writing unit tests, generating test fixtures and mocks, analyzing coverage gaps, and guiding red-green-refactor workflows across Jest, Pytest, JUnit, Vitest, and Mocha. Use when the user asks to write tests, improve test coverage, practice TDD, generate mocks or stubs, or mentions testing frameworks like Jest, pytest, or JUnit.
playwright
mindrally/skills
Playwright end-to-end testing best practices for web applications, covering test design, locator strategies, and assertion patterns.
web-debug
sentimony/skills
You MUST use this when interacting with or testing local web applications with Playwright - verifying frontend functionality, debugging UI behavior, capturing browser screenshots, or viewing browser console logs.
git-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.
capacitor-testing
cap-go/capgo-skills
Complete testing guide for Capacitor apps covering unit tests, integration tests, E2E tests, and native testing. Includes Jest, Vitest, Playwright, Appium, and native testing frameworks. Use this skill when users need to test their mobile apps.
automation-workflows
jk-0001/skills
Design and implement automation workflows to save time and scale operations as a solopreneur. Use when identifying repetitive tasks to automate, building workflows across tools, setting up triggers and actions, or optimizing existing automations. Covers automation opportunity identification, workflow design, tool selection (Zapier, Make, n8n), testing, and maintenance. Trigger on "automate", "automation", "workflow automation", "save time", "reduce manual work", "automate my business", "no-code automation".
create-hook
neolabhq/context-engineering-kit
Create and configure git hooks with intelligent project analysis, suggestions, and automated testing
agent-evaluation
sickn33/agentic-awesome-skills
Testing and benchmarking LLM agents including behavioral testing,
pentesting-with-aws-security-agent
aws/agent-toolkit-for-aws
Run an AWS Security Agent penetration test against a live web application — registers and verifies the target domain, exercises the supplied endpoints with the managed Security Agent service, and returns verified runtime findings. Use when the user asks to pentest, run a penetration test, test their app's attack surface, find runtime vulnerabilities, register or verify a target domain, or check pentest status / findings.
experience-aura-lwc-migrate
forcedotcom/sf-skills
Use this skill to analyze a Salesforce Aura component bundle (.cmp, .app, .evt, .intf, Controller.js, Helper.js, Renderer.js) and produce a framework-agnostic migration blueprint (PRD.yaml / PRD.md / PRD.json) capturing public API, data requirements, slots, events, states, accessibility, styling, localization, and security posture. This is Phase 1 (analysis + PRD) only — it does NOT author or edit component code, wire adapters, or Jest tests, and does not write .html/.js/.css/.js-meta.xml. TRIGGER when the user says \"analyze this Aura component\", \"migrate Aura\", \"convert .cmp\", \"produce a migration blueprint\", \"generate a PRD for this Aura component\", or mentions aura:attribute, aura:handler, force:recordData, $Label, $Resource, component.get, cmp.find, or an input directory containing .cmp files. DO NOT TRIGGER when there is no Aura source (delegate downstream LWC authoring to experience-lwc-generate), for post-migration scoring, or for refactoring an existing modern component.
hyva-playwright-test
hyva-themes/hyva-ai-tools
Write Playwright tests for Hyvä themes with Alpine.js components. This skill should be used when writing e2e tests, creating page objects, or debugging selector issues in Playwright tests for Hyvä Magento storefronts. Trigger phrases include "write playwright test", "playwright alpine", "test hyva page", "e2e test", "playwright selector".
vitest
sentimony/skills
You MUST use this when configuring, writing, debugging, running, migrating, or auditing Vitest tests in JavaScript/TypeScript projects - Vite, Vue, Nuxt, React, Next.js, Node libraries, workspaces, coverage, mocks, snapshots, flaky tests, CI parity, or Jest migration.
python-pypi-package-builder
github/awesome-copilot
End-to-end skill for building, testing, linting, versioning, and publishing a production-grade Python library to PyPI. Covers all four build backends (setuptools+setuptools_scm, hatchling, flit, poetry), PEP 440 versioning, semantic versioning, dynamic git-tag versioning, OOP/SOLID design, type hints (PEP 484/526/544/561), Trusted Publishing (OIDC), and the full PyPA packaging flow. Use for: creating Python packages, pip-installable SDKs, CLI tools, framework plugins, pyproject.toml setup, py.typed, setuptools_scm, semver, mypy, pre-commit, GitHub Actions CI/CD, or PyPI publishing.
senior-security
davila7/claude-code-templates
Comprehensive security engineering skill for application security, penetration testing, security architecture, and compliance auditing. Includes security assessment tools, threat modeling, crypto implementation, and security automation. Use when designing security architecture, conducting penetration tests, implementing cryptography, or performing security audits.
qiaomu-opencli-explorer
joeseesun/qiaomu-opencli-skills
Use when creating a new OpenCLI adapter from scratch, adding support for a new website or platform, exploring a site's API endpoints via browser DevTools, or when a user asks to automatically generate a CLI for a website (e.g. "帮我生成 xxx.com 的 cli"). Covers automated generation, API discovery workflow, authentication strategy selection, TS adapter writing, and testing.
docker
bobmatnyc/claude-mpm-skills
Docker containerization for packaging applications with dependencies into isolated, portable units ensuring consistency across development, testing, and production environments.
playwright-recording
digitalsamba/claude-code-video-toolkit
Record browser interactions as video using Playwright. Use for capturing demo videos, app walkthroughs, and UI flows for Remotion videos. Triggers include recording a demo, capturing browser video, screen recording a website, or creating walkthrough footage.
cicd-pipeline-generator
ailabs-393/ai-labs-claude-skills
This skill should be used when creating or configuring CI/CD pipeline files for automated testing, building, and deployment. Use this for generating GitHub Actions workflows, GitLab CI configs, CircleCI configs, or other CI/CD platform configurations. Ideal for setting up automated pipelines for Node.js/Next.js applications, including linting, testing, building, and deploying to platforms like Vercel, Netlify, or AWS.
axiom-testing
charleswiltgen/axiom
Use when writing ANY test, debugging flaky tests, making tests faster, or choosing Swift Testing vs XCTest. Covers unit tests, UI tests, async testing, test architecture.
maestro-mobile-testing
tovimx/maestro-mobile-testing-skill
Maestro mobile E2E testing patterns for React Native/Expo apps: YAML test flows, testID selectors, adaptive auth state, optimistic update verification, GraalJS scripting, cross-platform stability, CI/CD integration, Maestro Cloud, and MCP server integration
senior-data-scientist
alirezarezvani/claude-skills
World-class senior data scientist skill specialising in statistical modeling, experiment design, causal inference, and predictive analytics. Covers A/B testing (sample sizing, two-proportion z-tests, Bonferroni correction), difference-in-differences, feature engineering pipelines (Scikit-learn, XGBoost), cross-validated model evaluation (AUC-ROC, AUC-PR, SHAP), and MLflow experiment tracking — using Python (NumPy, Pandas, Scikit-learn), R, and SQL. Use when designing or analysing controlled experiments, building and evaluating classification or regression models, performing causal analysis on observational data, engineering features for structured tabular datasets, or translating statistical findings into data-driven business decisions.
playwright
secondsky/claude-skills
Browser automation and E2E testing with Playwright. Auto-detects dev servers, writes clean test scripts. Test pages, fill forms, take screenshots, check responsive design, validate UX, test login flows, check links, automate any browser task. Use for cross-browser testing, visual regression, API testing, component testing in TypeScript/JavaScript and Python projects.
create-call
vapiai/skills
Create outbound phone calls, web calls, and batch calls using the Vapi API. Use when making automated calls, testing voice assistants, scheduling call campaigns, or initiating conversations programmatically.
survey-design
owl-listener/designer-skills
Design unbiased survey instruments — question wording, scales, and sampling — to measure attitudes at scale. Use when you need quantitative breadth. For behavioural experiments, use `a-b-test-design` (prototyping-testing).
