Claude skills and agent skills

Skills real projects publish on GitHub, most starred first. Each one says what it will make an agent do before you copy it.

Best matchesWorked for most · soon

“testing” Anthropic 1k+ stars

lobehubSkill

testing

lobehub/lobehub/.agents/skills/testing/SKILL.md

Use for Vitest tests, mocks, coverage and failing-test diagnosis.

83k3d agoDiscuss

iOfficeAISkill

testing

iOfficeAI/AionUi/.claude/skills/testing/SKILL.md

Testing workflow and quality standards for writing and running tests. Use when: (1) Writing new tests, (2) Adding a new feature that needs tests, (3) Modifying logic that has existing tests, (4) Before claiming a task is complete.

33k6mo agoDiscuss

JetBrainsSkill

testing

JetBrains/intellij-community/.agents/skills/testing/SKILL.md

Run or troubleshoot IntelliJ `tests.cmd` tests and discovery.

21k8d agoDiscuss

JetBrainsSkill

testing

JetBrains/intellij-community/.claude/skills/testing/SKILL.md

Run or troubleshoot IntelliJ `tests.cmd` tests and discovery.

21k8d agoDiscuss

kortix-aiSkill

testing

kortix-ai/suna/.agents/skills/testing/SKILL.md

Use for every Kortix test task, behavior change, bug fix, refactor, API route change, CLI change, SDK change, browser journey, test failure, coverage question, local benchmark, or testing infrastructure change. Enforce the single local-first runner, black-box flow contracts, package-local SDK tests, browser-only Playwright tests, and real input/output verification.

20k3d agoDiscuss

Model Context ProtocolSkill

testing

modelcontextprotocol/inspector/.claude/skills/testing/SKILL.md

Run, place and fix tests in this repo. Use when choosing which npm command runs a given suite (web unit, web integration, Storybook, cli, tui, launcher, scripts); when deciding where a new test file belongs — beside its source, under src/test/, or in a client's __tests__/; when a per-file coverage check fails or a v8 ignore is in question; when asking which test tier spawns the built binary rather than importing it; or when rendering, mounting or asserting on Mantine components and their transitions in a test.

11k8d agoDiscuss

MicrosoftSkill

testing

microsoft/fast/.github/skills/testing/SKILL.md

Use this skill when running or writing tests in the FAST monorepo — local test execution, CI workflows, Playwright fixtures, and WebUI integration testing.

9.7k4mo agoDiscuss

bytebaseSkill

testing

bytebase/dbhub/.claude/skills/testing/SKILL.md

Run and troubleshoot tests for DBHub, including unit tests, integration tests with Testcontainers, and database-specific tests. Use when asked to run tests, fix test failures, debug integration tests, troubleshoot Docker/database container issues, or add new tests. Also use when verifying code changes work correctly or when CI test failures need investigation.

3.6k11d agoDiscuss

BankrBotSkill

Testing

BankrBot/skills/ethskills-testing/SKILL.md

Smart contract testing with Foundry — unit tests, fuzz testing, fork testing against live state, and invariant testing. What to test, what to skip, and what LLMs commonly get wrong.

1.2k5mo agoDiscuss

vm0-aiSkill

testing

vm0-ai/vm0/.claude/skills/testing/SKILL.md

Comprehensive testing patterns and anti-patterns for writing and reviewing tests

1.2k6mo agoDiscuss

CloudflareSkill

testing

cloudflare/sandbox-sdk/.agents/skills/testing/SKILL.md

Use when writing or running tests for this project. Covers unit vs E2E test decisions, test file locations, mock patterns, and project-specific testing conventions. (project)

1.1k4mo agoDiscuss

affaan-mSkill

e2e-testing

affaan-m/ECC/.agents/skills/e2e-testing/SKILL.md

Playwright E2E testing patterns, Page Object Model, configuration, CI/CD integration, artifact management, and flaky test strategies. Use when writing Playwright tests, structuring page objects, or fixing flaky E2E runs in CI.

246k30d agoReads credentialsDiscuss

MicrosoftSkill

pr-testing

microsoft/aspire/.agents/skills/pr-testing/SKILL.md

Use when asked to test a microsoft/aspire pull request, including CLI, hosting, dashboard, component, template, and VS Code extension changes. Also covers testing PRs that change CI infrastructure — GitHub Actions (workflows, actions, gh-aw agentic workflows, CI scripts under .github/ and eng/) and Azure DevOps pipelines (eng/pipelines, eng/common).

6.3k4mo agoPipes a download into a shellDiscuss

AnthropicSkill

sox-testing

anthropics/knowledge-work-plugins/finance/skills/sox-testing/SKILL.md

Generate SOX sample selections, testing workpapers, and control assessments. Use when planning quarterly or annual SOX 404 testing, pulling a sample for a control (revenue, P2P, ITGC, close), building a testing workpaper template, or evaluating and classifying a control deficiency.

26k8mo agoDiscuss

ElasticSkill

ftr-testing

elastic/kibana/.agents/skills/ftr-testing/SKILL.md

Deep reference for the Kibana Functional Test Runner (FTR). Use when reading, analyzing, debugging, or reviewing FTR tests, including config anatomy, services, page objects, loadTestFile patterns, data loading, tags, CI wiring, and common FTR idioms.

21k3mo agoDiscuss

SentrySkill

hybrid-cloud-test-gen

getsentry/sentry/.agents/skills/hybrid-cloud-test-gen/SKILL.md

Generate hybrid cloud tests for the Sentry codebase. Use when asked to "generate HC test", "create hybrid cloud test", "write HC test", "add HC test", "write RPC test", "test RPC service", "silo test", "cross-silo test", "outbox test", "API gateway test", or "endpoint silo test". Covers RPC service tests, API gateway tests, outbox pattern tests, and API endpoint tests with silo decorators.

45k3mo agoDiscuss

manaflow-aiSkill

cmux-testing

manaflow-ai/cmux/skills/cmux-testing/SKILL.md

Choose scoped cmux verification, add behavioral tests, and validate Swift test targets and wiring. Use when adding tests or deciding what local/CI evidence a change needs.

27k3d agoDiscuss

mrgoonieSkill

web-testing

mrgoonie/claudekit-skills/.claude/skills/web-testing/SKILL.md

Web testing with Playwright, Vitest, k6. E2E/unit/integration/load/security/visual/a11y testing. Use for test automation, flakiness, Core Web Vitals, mobile gestures, cross-browser.

2.2k11mo agoDiscuss

SentrySkill

write-tests

getsentry/sentry-javascript/.agents/skills/write-tests/SKILL.md

Write high-quality unit tests (Vitest) and E2E tests (Playwright) following senior test-engineering practices. Use this skill whenever asked to write tests, add test coverage, create test cases, fix failing tests, add missing assertions, test a new feature, write specs, or cover edge cases. Also trigger when the user says "write tests for", "add tests", "test this", "cover this", "needs tests", "add E2E test", "add unit test", "test coverage", or when reviewing code and noticing missing test coverage.

8.7k3d agoDiscuss

xu-xiangSkill

e2e-testing

xu-xiang/everything-claude-code-zh/.agents/skills/e2e-testing/SKILL.md

Playwright E2E 测试模式、页面对象模型（POM）、配置、CI/CD 集成、产物管理以及不稳定测试（flaky test）策略。

1.9k7mo agoReads credentialsDiscuss

CLAUDE.md vs AGENTS.md

About skills

What is a Claude skill?

A folder with a SKILL.md file: a name, a description of when to use it, and instructions. Claude loads a skill only when the task matches its description.

How do I use one I find here?

Copy the folder into your project's .claude/skills/ directory, or into your own skills folder to use it everywhere.

What do the warnings mean?

We read each file for commands that read secrets, delete things or pipe downloads into a shell, and say so before you copy it. No warning is not a promise that a file is safe.

Which skills worked for people?

Open a skill to see its discussion. Reports from people and their agents are coming.