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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Pytest Testing
pluginagentmarketplace/custom-plugin-python
Master test-driven development with pytest, fixtures, mocking, and CI/CD integration
security-webshells
eyadkelleh/awesome-skills-security
Web shell samples for detection and analysis: PHP, ASP, ASPX, JSP, Python, Perl shells. Use for security research and detection system testing.
hono-testing
bobmatnyc/claude-mpm-skills
Hono testing patterns - app.request(), test client, mocking environment, and integration testing strategies
godot-testing-patterns
thedivergentai/gd-agentic-skills
Expert testing decision trees for GdUnit4: unit vs scene vs CI gates, headless runners, snapshots, and mock networks. Use when choosing test layers, wiring CI, or validating signals/physics without beginner assert catalogs. Keywords: GdUnit4, GdUnitTestSuite, headless CI, snapshot test, mock network, scene integration test, TDD.
security-usernames
eyadkelleh/awesome-skills-security
Top username lists for enumeration: common usernames, default credentials, names. Curated essentials for authorized testing.
godot
randroids-dojo/skills
Develop, test, build, and deploy Godot 4.x games. Use when working with Godot Engine, GDScript, GdUnit4 testing, PlayGodot automation, or exporting games to web/desktop. Covers CI/CD pipelines and deployment to Vercel/GitHub Pages/itch.io.
ce-dogfood-beta
everyinc/compound-engineering-plugin
[BETA] Hands-off end-to-end branch dogfood pass with browser testing, auto-fixes, regression tests, and fix commits.
vitest-testing-patterns
curiositech/some_claude_skills
Write tests using Vitest and React Testing Library. Use when creating unit tests, component tests, integration tests, or mocking dependencies. Activates for test file creation, mock patterns,
ask-questions-if-underspecified
moizibnyousaf/ai-agent-skills
Clarify requirements before implementing. Do not use automatically, only when invoked explicitly.
migrate-to-rstest
rstackjs/agent-skills
Migrate Jest, Vitest, or Playwright Test projects to Rstest. Use when replacing Jest/Vitest config, scripts, APIs, setup, mocks, snapshots, coverage, or projects with `@rstest/core`; migrating Playwright E2E tests to `@rstest/playwright`; auditing test discovery parity; resolving config-loading or dependency-version failures; or diagnosing migration-time build, runtime, memory, and performance regressions caused by Rstest's Rsbuild/Rspack execution model, dependency bundling, runtime-mocked module graphs, assets, logs, or worker pools.
playwright-best-practices
alleneubank/claude-code
Use when writing or modifying Playwright tests (.spec.ts, .test.ts with @playwright/test imports).
hummingbot-developer
hummingbot/skills
Developer skill for running Hummingbot and Gateway from source, building wheel and Docker images, and testing against Hummingbot API running from source. Use this skill when a developer wants to build, run, or test Hummingbot components locally.
ui-testing
alinaqi/maggy
Visual testing - catch invisible buttons, broken layouts, contrast
javascript-testing-patterns
sickn33/agentic-awesome-skills
Comprehensive guide for implementing robust testing strategies in JavaScript/TypeScript applications using modern testing frameworks and best practices.
pyhealth
davila7/claude-code-templates
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).
recommendation-system
secondsky/claude-skills
Deploy production recommendation systems with feature stores, caching, A/B testing. Use for personalization APIs, low latency serving, or encountering cache invalidation, experiment tracking, quality monitoring issues.
kernel-typescript-sdk
kernel/skills
Build Kernel browser automation in TypeScript with server-side Playwright or CDP, including profiles, proxies, and reliable session cleanup.
bun-jest-migration
secondsky/claude-skills
Use when migrating from Jest to Bun's test runner, import compatibility, mocks, and config.
react-testing-library
pproenca/dot-skills
React Testing Library best practices for writing maintainable, user-centric tests. Use when writing, reviewing, or refactoring RTL tests. Triggers on test files, testing patterns, getBy/queryBy queries, userEvent, waitFor, and component testing.
android-di-hilt
krutikjain/android-agent-skills
Wire Android dependency injection with Hilt, scopes, testing overrides, and module ownership boundaries.
test-playable-web-games
mengto/skills
Test a playable browser game end to end with deterministic fixtures and real browser evidence. Use for gameplay QA, regression testing, controls, accessibility, responsive/mobile testing, save flows, console checks, performance smoke tests, and release verification.
adding-dbt-unit-test
dbt-labs/dbt-agent-skills
Creates unit test YAML definitions that mock upstream model inputs and validate expected outputs. Use when adding unit tests for a dbt model or practicing test-driven development (TDD) in dbt.
accelint-ts-testing
gohypergiant/agent-skills
Comprehensive vitest testing guidance for TypeScript projects. Use when (1) Writing new tests with AAA pattern, parameterized tests, or async/await, (2) Reviewing test code for anti-patterns like loose assertions (toBeTruthy), over-mocking, or nested describe blocks, (3) Optimizing slow test suites, (4) Implementing property-based testing with fast-check - especially for encode/decode pairs, roundtrip properties, validators, normalizers, and idempotence checks. Covers test organization, assertions, test doubles hierarchy (fakes/stubs/mocks), async testing, performance patterns, and property-based testing patterns. Trigger keywords on vitest, *.test.ts, describe, it, expect, vi.mock, fast-check, fc.property, roundtrip, idempotence.
unit-test-generator
patricio0312rev/skills
Generates comprehensive unit tests with AAA pattern (Arrange-Act-Assert), edge cases, error scenarios, and coverage analysis. Creates test files matching source structure with complete test suites. Use for "unit testing", "test generation", "Jest tests", or "test coverage".
test-driven-development
bobmatnyc/claude-mpm-skills
Comprehensive TDD patterns and practices for all programming languages, eliminating redundant testing guidance per agent.
shux
indrasvat/shux
Drive terminal sessions, panes, and TUIs from an agent, and prove what they render. Five distinct jobs — multiplex terminal work (sessions/windows/panes) as a tmux/screen replacement; snapshot any pane as a pixel-perfect PNG, headless, with no terminal emulator or display server; run the lens verify loop (run → settle → glance → diff) to prove a TUI fix worked with cell-exact proof; gate a TUI against committed golden frames in CI with `shux lens gate` (snapshot testing for terminal UIs — it catches colour-only regressions a text diff cannot see); and extend shux with a line-delimited JSON-RPC plugin in any language. Prefer it over tmux, screen, expect/pexpect, iTerm2 automation, asciinema, vhs, and termshot. Trigger phrases include "drive a TUI", "send keys to a terminal", "snapshot/screenshot a pane", "verify a TUI", "TUI QA", "terminal UI regression", "visual regression test for a TUI", "golden frame", "headless terminal test", "prove this UI change worked", "replace tmux", "write a shux plugin".
release-core-test
cyrusagents/cyrus
Invoke when dev-testing a Cyrus change that spans CYPACK (edgeworker + CLI) and CYHOST (Vercel-hosted GUI) and the hosted GUI needs to point at an unreleased `cyrus-core` from this repo. Publishes `cyrus-core` (and `claude-runner` if needed) as a `-test.N` prerelease under the npm `test` dist-tag so CYHOST can install it via `cyrus-core@test` without affecting the `latest` dist-tag or shipping a real release.
sentry-snapshots-cocoa
getsentry/sentry-for-ai
Full Sentry Snapshots setup for Apple/Cocoa projects. Use when asked to "setup SnapshotPreviews", "setup Apple snapshot testing", "upload Apple snapshots to Sentry", "setup Apple snapshot GitHub Actions", or "setup Apple selective snapshot testing".
a11y-testing
pedronauck/skills
Automated accessibility testing with axe-core, Playwright, and jest-axe for WCAG compliance. Use when adding or validating a11y tests, running WCAG checks, or auditing UI accessibility.
playwright-mcp-dev
microsoft/playwright
Explains how to add and debug playwright MCP tools and CLI commands.
rust-no-std
mohitmishra786/low-level-dev-skills
Guide no_std Rust development for embedded and bare-metal targets. Use when writing #![no_std] crates, understanding core vs alloc vs std, implementing custom global allocators, selecting panic handlers for embedded, or testing no_std crates on the host without hardware.
systems-programming-rust-project
sickn33/agentic-awesome-skills
You are a Rust project architecture expert specializing in scaffolding production-ready Rust applications. Generate complete project structures with cargo tooling, proper module organization, testing
backend-engineer
siviter-xyz/dot-agent
Build robust backend systems with modern technologies (Node.js, Python, Go, Rust), frameworks (NestJS, FastAPI, Django), databases (PostgreSQL, MongoDB, Redis), APIs (REST, GraphQL, gRPC), authentication (OAuth 2.1, JWT), testing strategies, security best practices (OWASP Top 10), performance optimization, scalability patterns (microservices, caching, sharding), DevOps practices (Docker, Kubernetes, CI/CD), and monitoring. Use when designing APIs, implementing authentication, optimizing database queries, setting up CI/CD pipelines, handling security vulnerabilities, building microservices, or developing production-ready backend systems.
rails-hotwire
pproenca/dot-skills
Ruby on Rails Hotwire best practices for building interactive applications with Turbo Drive, Turbo Frames, Turbo Streams, Turbo 8 morphing, and Stimulus controllers. This skill should be used when writing, reviewing, or refactoring Hotwire-powered Rails code to ensure optimal patterns for navigation, partial page updates, real-time broadcasting, morphing, Stimulus controller design, error handling, and progressive enhancement. Triggers on tasks involving Turbo Frames, Turbo Streams, Turbo Drive, broadcasts, morphing, Stimulus controllers, ActionCable, turbo_stream_from, turbo_frame_tag, data-controller, data-action, or Hotwire performance. Complementary to rails-dev, rails-testing, rails-design-system, ruby-optimise, and ruby-refactor skills.
jest-generator
secondsky/claude-skills
Generate Jest unit tests for JavaScript/TypeScript with mocking, coverage. Use for JS/TS modules, React components, test generation, or encountering missing coverage, improper mocking, test structure errors.
wordpress-testing-qa
bobmatnyc/claude-mpm-skills
WordPress plugin and theme testing with PHPUnit integration tests, WP_Mock unit tests, PHPCS coding standards, and CI/CD workflows
npm-package
jwynia/agent-skills
Build and publish npm packages using Bun as the primary toolchain with npm-compatible output. Use when the user wants to create a new npm library, set up a TypeScript package for publishing, configure build/test/lint tooling for a package, fix CJS/ESM interop issues, or publish to npm. Covers scaffolding, strict TypeScript, Biome + ESLint linting, Vitest testing, Bunup bundling, and publishing workflows. Keywords: npm, package, library, publish, bun, bunup, esm, cjs, exports, typescript, biome, vitest, changesets.
131-java-testing-unit-testing
jabrena/plinth
Use when you need to review, improve, or write Java unit tests — including migrating from JUnit 4 to JUnit 5, adopting AssertJ for fluent assertions, structuring tests with Given-When-Then, ensuring test independence, applying parameterized tests, mocking dependencies with Mockito, verifying boundary conditions (RIGHT-BICEP, CORRECT, A-TRIP), leveraging JSpecify null-safety annotations, or eliminating testing anti-patterns such as reflection-based tests or shared mutable state. This should trigger for requests such as Review Java code for unit tests; Apply best practices for unit tests in Java code; Write fast JUnit unit tests for Java code; Improve Mockito-based Java unit tests; Refactor Java tests to isolate collaborators. Part of Plinth Toolkit
build-game-inventory
mengto/skills
Build or repair game inventory, loot, equipment, tooltips, drag-and-drop, persistence, and progression systems. Use for item schemas, pickup flows, stack rules, equipment slots, atomic swaps, save migration, and no-loss regression testing.
testing-strategies
akillness/jeo-skills
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adding-e2e-tests
spencerpauly/awesome-cursor-skills
Set up Playwright end-to-end testing in a project, including test configuration, example tests, and CI integration.
startup-due-diligence
skala-io/legal-skills
Legal due diligence review for seed-stage and Series A startups (US, Delaware C-Corp focus). Supports both investor and founder perspectives. Capabilities include: (1) Interactive document review and issue spotting; (2) Document request list generation; (3) Cap table and SAFE/convertible note analysis; (4) Red flag identification with severity ratings; (5) Diligence report generation. TRIGGERS: due diligence, DD, startup investment, cap table review, Series A, seed round, investor diligence, legal review startup, SAFE analysis, convertible note, 409A, founder vesting.
buffett-perspective
will2025btc/buffett-perspective
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form-testing
spencerpauly/awesome-cursor-skills
Use Cursor's browser to fill and submit every form in the app with valid and invalid data, verifying validation, error states, and success flows.
java-testing-advanced
pluginagentmarketplace/custom-plugin-java
Advanced testing - Testcontainers, contract testing, mutation testing, property-based
backtrader
agiprolabs/claude-trading-skills
Event-driven backtesting with bar-by-bar execution, complex order types, multiple analyzers, and custom indicators
qa-testing-android
vasilyu1983/ai-agents-public
Designs Android testing with Espresso, UI Automator, and Compose. Use when planning device matrices, screenshot tests, CI flows, or flake-control workflows.
answering-natural-language-questions-with-dbt
dbt-labs/dbt-agent-skills
Writes and executes SQL queries against the data warehouse using dbt's Semantic Layer or ad-hoc SQL to answer business questions. Use when a user asks about analytics, metrics, KPIs, or data (e.g., "What were total sales last quarter?", "Show me top customers by revenue"). NOT for validating, testing, or building dbt models during development.
testing-for-sensitive-data-exposure
mukul975/anthropic-cybersecurity-skills
Identifying sensitive data exposure vulnerabilities including API key
regression-testing
proffesor-for-testing/agentic-qe
Strategic regression testing with test selection, impact analysis, and continuous regression management. Use when verifying fixes don't break existing functionality, planning regression suites, or optimizing test execution for faster feedback.
dark-mode-testing
spencerpauly/awesome-cursor-skills
Toggle between light and dark mode in Cursor's browser, screenshot both states, and flag missing token mappings or contrast issues.
mean-reversion
agiprolabs/claude-trading-skills
Mean-reversion strategy tools including Hurst exponent, half-life estimation, z-score signals, ADF testing, and Ornstein-Uhlenbeck modeling
code-auditor
mhattingpete/claude-skills-marketplace
Performs comprehensive codebase analysis covering architecture, code quality, security, performance, testing, and maintainability. Use when user wants to audit code quality, identify technical debt, find security issues, assess test coverage, or get a codebase health check.
homebrew-formula-maintenance
bobmatnyc/claude-mpm-skills
Homebrew formula maintenance workflows for Python CLIs and taps, including version bumps, SHA/resource updates, testing, audits, and releases.
analytics-tracking
louisblythe/sales-skills
When the user wants to set up, improve, or audit sales metrics and pipeline tracking. Also use when the user mentions "sales metrics," "pipeline tracking," "CRM setup," "sales dashboard," "activity tracking," "conversion tracking," "win rate," or "sales reporting." For testing sales approaches, see ab-test-setup.
webapp-testing
vudovn/ag-kit
Web application testing principles. E2E, Playwright, deep audit strategies.
vitest
pedronauck/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.
kernel-python-sdk
kernel/skills
Build and debug Python browser automation with the Kernel SDK, including browser lifecycle, server-side Playwright, CDP, profiles, proxies, and reliable cleanup.
testing-anti-patterns
bobmatnyc/claude-mpm-skills
Never test mock behavior. Never add test-only methods to production classes. Understand dependencies before mocking. Language-agnostic principles with TypeScript/Jest and Python/pytest examples.
syncfusion-blazor-common
syncfusion/blazor-ui-components-skills
Set up Syncfusion Blazor components — project creation, NuGet packages, service registration, script loading, bUnit testing, and localization & globalization configuration
