Skills real projects publish on GitHub, most starred first. Each one says what it will make an agent do before you copy it.
baturSkillbatur/ts-baseline-docs/.agents/skills/ts-testing/SKILL.md
Defines the TypeScript testing standard for AI coding and review. Use when adding, changing, or reviewing tests, test structure, Vitest, Playwright e2e, validation/error/PATCH/auth/security/tenant tests, fixtures, mocks/fakes, coverage, CI test commands, or any behavior that needs test protection.
ngocsangyemSkillngocsangyem/MeowKit/.claude/skills/testing/SKILL.md
Use when writing tests, running validation scripts, or (in TDD mode) enforcing red-green-refactor cycle. Activates during Phase 2 (Test) and Phase 3 (Build). NOT for coverage gap mapping (see mk:nyquist); NOT for sprint contract negotiation (see mk:sprint-contract).
amElnagdySkillamElnagdy/guard-skills/skills/test-guard/SKILL.md
Review generated or changed test code against universal testing rules before it ships. Best used reactively after an agent writes, edits, generates, or refactors tests, before presenting, committing, or merging them. Use for pytest (test_*.py, *_test.py), PHPUnit/Pest (*Test.php), Jest/Vitest (*.test.ts, *.spec.js), Go (*_test.go), files under tests/, __tests__/, or spec/, and review requests like 'write tests for X', 'add tests', 'test this', 'review these tests', or PR diffs containing tests. Can also guide test writing when explicitly invoked before the work. This skill is the quality gate that prevents AI-generated test bloat. DO NOT USE for production or implementation code review (use clean-code-guard), CI or test-runner configuration, running or debugging tests, or general architecture discussion.
cohen-lielSkillcohen-liel/hivemind/.claude/skills/e2e-testing/SKILL.md
End-to-end testing patterns with Playwright. Use when writing browser automation tests, integration tests, testing user flows, or setting up E2E test suites.
mturacSkillmturac/everything-openai-codex/.agents/skills/e2e-testing/SKILL.md
Playwright E2E testing patterns, Page Object Model, configuration, CI/CD integration, artifact management, and flaky test strategies.
PostHogSkillPostHog/posthog/.agents/skills/writing-tests/SKILL.md
Gates whether a new test should exist and forces it to be efficient, protecting CI from low-value test bloat. Use before any change to what a pytest, Jest, or Playwright test asserts or sets up, down to one fixture or one assertion added to an existing block. Front-loads the value bar (every test must catch a realistic regression no existing test already catches; extend the nearest existing test before writing a new standalone one; test behavior through the public interface, not implementation details; collapse near-duplicates into parameterized cases) and the efficiency bar (deterministic, isolated, fast; pick the cheapest test level; Django TestCase over TransactionTestCase; no sleeps, no real network; no time bombs from absolute dates left to age against the real clock; no database a test never uses). Includes a "don't write it" decision tree. For fixing an existing flaky test use `/fixing-flaky-tests`; after this gate says a Playwright test is warranted, use `/playwright-test` for mechanics.
GitHubSkillgithub/awesome-copilot/skills/webapp-testing/SKILL.md
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
MicrosoftSkillmicrosoft/testfx/.agents/skills/code-testing-agent/SKILL.md
Generates and writes new unit tests for any programming language — scaffolds .NET test projects, pytest suites, Vitest/Jest suites, Go test files, and JUnit suites, and configures coverage tooling (coverlet, pytest-cov, @vitest/coverage-v8) as part of test generation. Use when asked to generate tests, generate pytest tests, generate Vitest tests, write unit tests, add tests, improve coverage, comprehensive tests, or scaffold a new test project or suite for an app, service, library, REST API, blueprint, or package — including project-wide, multi-file test generation across services, repositories, routes, and modules. Supports C#/.NET, Python (pytest, Flask/Django), TypeScript/JavaScript (Vitest, Jest, Mocha), Go, Rust, Java (JUnit). Runs a research, planning, and implementation pipeline so tests compile and pass. DO NOT USE FOR: running existing tests (use run-tests); analyzing existing coverage reports (use coverage-analysis or crap-score); MSTest modernization (use writing-mstest-tests).
GoogleSkillgoogle/capsem/skills/dev-testing/SKILL.md
Capsem testing policy and workflow. Use whenever running or writing tests. For VM, hypervisor, frontend, or Python specifics see the dev-testing-* skills.
hyhmrrightSkillhyhmrright/brooks-lint/skills/brooks-test/SKILL.md
Test quality review drawing on twelve classic engineering books — with primary focus on xUnit Test Patterns, The Art of Unit Testing, How Google Tests Software, and Working Effectively with Legacy Code — that diagnoses structural problems in an existing test suite: brittleness, mock abuse, coverage illusions, slow execution, poor readability. Triggers when: user asks about test quality, shares test files for review, or expresses frustration: "tests keep breaking whenever I change anything", "our tests take forever", "tests pass but bugs still reach production", or "we have too many mocks". Do NOT trigger for: writing new tests from scratch (use the regular test-writing workflow) or testing framework/syntax questions — this skill reviews an existing suite for structural quality problems, not individual test authoring.
ComposioHQSkillComposioHQ/composio/.agents/skills/python-testing/SKILL.md
Select and run Python SDK verification with nox, Makefile targets, Ruff, mypy, pytest markers, sanity tests, type inference checks, and build checks. Use when adding Python tests, diagnosing Python CI, or validating Python SDK/provider changes. Do not use for TypeScript-only checks.
AWSSkillawslabs/awsome-distributed-ai/architectures/sagemaker-hyperpod-eks/slinky-slurm/.opencode/skills/bash-testing/SKILL.md
Patterns for unit testing bash scripts using bats-core, including AWS CLI mocking, jq/sed/awk testing, and cross-platform portability
NVIDIASkillNVIDIA/skills/skills/mcore-testing/SKILL.md
Test system for Megatron-LM. Covers test layout, recipe YAML structure, adding and running unit and functional tests, golden values, marker filters, and CI parity.
astronomerSkillastronomer/agents/skills/testing-dags/SKILL.md
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.
BejeweledMeSkillBejeweledMe/codex-pro-agent-skills/skills/qa-testing/SKILL.md
Use when designing, reviewing, validating, debugging, or improving classic software QA strategy and automated test suites. Trigger for autotests, unit tests, integration tests, contract tests, end-to-end tests, test pyramid decisions, flaky tests, test doubles, mocks, fakes, stubs, test coverage, test maintainability, CI/CD quality gates, release validation, exploratory testing, and production feedback for non-LLM software systems.
samberSkillsamber/cc-skills-golang/skills/golang-testing/SKILL.md
Production-ready Golang tests — table-driven tests, testify suites and mocks, parallel tests, fuzzing, fixtures, goroutine leak detection with goleak, snapshot testing, code coverage, integration tests, idiomatic test naming. Use when writing or reviewing Go tests, choosing a testing approach, setting up Go test CI, or debugging flaky/slow tests. For testify-specific APIs see `samber/cc-skills-golang@golang-stretchr-testify`; for measurement methodology see `samber/cc-skills-golang@golang-benchmark`.
mathaixSkillmathaix/OpenClawMachines/.agents/skills/ocm-testing/SKILL.md
Choose and run the smallest safe OpenClaw Machines verification path for backend, frontend, Worker, host enrollment, Firecracker, rootfs, and self-hosted changes.
MicrosoftSkillmicrosoft/voxelpic/.github/skills/c-testing/SKILL.md
Write, build, and run C tests for the VoxelPic library. USE FOR: adding new C test cases, understanding the test data format, debugging test failures, or running the existing C test suite.
FmarzochiSkillFmarzochi/EGC/.agents/skills/e2e-testing/SKILL.md
Playwright E2E testing patterns, Page Object Model, configuration, CI/CD integration, artifact management, and flaky test strategies.
nahid-sparktalesSkillnahid-sparktales/agent-dispatcher/skills/quality/e2e-testing/SKILL.md
Build and keep end-to-end suites that are worth their runtime — which journeys belong at this level, selectors that survive refactors, waiting on state instead of sleeping, per-spec data isolation, and flake triage that finds the cause. Use when adding or repairing an e2e suite, when specs are slow or intermittently red, or when deciding whether a case belongs here at all. Not for one-off checking that a change renders, not for unit or integration tests, and not for load testing.
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.
Copy the folder into your project's .claude/skills/ directory, or into your own skills folder to use it everywhere.
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