Find the best CLAUDE.md, AGENTS.md and Claude skills

GoogleSkill

dev-testing

google/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.

ncklrsSkill

ab-testing

ncklrs/claude-chrome-user-testing/skills/ab-testing/SKILL.md

Testing Skill Compare two URL variants with the same persona to determine which provides a better user experience. This skill guides the comparison logic and report generation. ## When

Often used withfree-tools·marketing-council·emails

Strategic-AutomationSkill

api-testing

Strategic-Automation/violin/skills/api-testing/SKILL.md

Test REST, GraphQL, SOAP, and WebSocket API surfaces.

TypeCellOSSkill

testing-skill

TypeCellOS/BlockNote/.claude/skills/testing-skill/SKILL.md

Instructions for writing, running, and updating unit/end-to-end tests. Should be used when prompted specifically to add tests for a given feature, bug, or regression.

theexperiencecompanySkill

accurate-testing

theexperiencecompany/gaia/.agents/skills/accurate-testing/SKILL.md

Write adversarial test cases that break production code instead of producing false confidence. Use when writing, reviewing, or planning tests for any codebase. Triggers on: "write tests", "add test coverage", "test this function", "create unit tests", "integration tests", "fix flaky tests", "improve test coverage", "review test quality", "are these tests good", "test plan", "break this code", "find edge cases", or any task involving pytest, vitest, jest, or other test frameworks. Enforces the prime directive — a test that cannot fail is not a test — and prevents common AI testing pitfalls: over-mocking, testing frameworks instead of production code, fake implementations that bypass real logic, and assertion-free tests.

lichtblick-suiteSkill

unit-testing

lichtblick-suite/lichtblick/.github/skills/unit-testing/SKILL.md

Unit testing patterns, mock builder usage, and test data construction strategies for the Lichtblick monorepo.

The-OpenROAD-ProjectSkill

add-test

The-OpenROAD-Project/OpenROAD/.agents/skills/add-test/SKILL.md

Add integration or unit tests to an OpenROAD module. Handles the complete workflow: writing the Tcl/C++ test, generating golden files, and registering the test in Bazel. Use when asked to add tests, improve test coverage, create regression tests, or write unit tests for any OpenROAD module (ant, cts, dpl, drt, gpl, grt, mpl, odb, pad, pdn, psm, rcx, rsz, sta, stt, tap, upf, utl, etc.). Also triggers on: "add test", "write test", "test coverage", "missing tests", "create regression test", "add unit test".

MicrosoftSkill

code-testing

microsoft/testfx/.agents/skills/code-testing/SKILL.md

ALWAYS USE for test work that requires changes: write, add, generate, repair, or strengthen tests for existing code in xUnit, MSTest, NUnit, pytest, Vitest/Jest, Go, or another framework. Includes regression cases, failing or flaky tests, coverage-driven additions, and audit-then-fix requests. Focused work stays direct; broad or multi-stage work invokes test-engineer. DO NOT USE for only running tests, analysis-only audits, framework/platform migrations, a test blocked on a missing production seam (testability-obstacle), or MSTest API/configuration corrections that do not design new cases (writing-mstest-tests). Within an active test-engineer pipeline, reuse supplied guidance and do not re-enter this skill.

javierbreaSkill

unit-testing

javierbrea/eslint-plugin-boundaries/.agents/skills/unit-testing/SKILL.md

Complete or maximize unit test coverage for a specific TypeScript file in this repo. Use when: a test run is short of the 100% coverage threshold and you need to find and close the gap, or when deciding whether an uncovered branch is genuinely unreachable. For everyday test-writing conventions (AAA, mocking, placement, type safety), see .agents/rules/unit-testing.md instead — it loads automatically for any *.spec.ts file.

AllThingsSmittySkill

ts-testing

AllThingsSmitty/proven-skills/skills/ts-testing/SKILL.md

TypeScript testing advisor. Always use this skill when writing tests in TypeScript, setting up Jest or Vitest with TypeScript, creating type-safe mocks, or writing type-level tests. Use when the user asks "how do I mock this in TypeScript", "my mock has the wrong type", "how do I test that a type is correct", "jest.fn doesn't match my interface", "how do I set up Jest with TypeScript", "how do I avoid as any in tests", or "how do I write a type-level test". Read this skill before writing any TypeScript tests or mocks.

baturSkill

ts-testing

batur/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.

feast-devSkill

feast-testing

feast-dev/feast/skills/feast-testing/SKILL.md

How to test and debug Feast — running targeted tests, writing unit tests for new components, debugging registry and online store issues, and inspecting live feature store state. Use when writing tests for a new feature, debugging a failing test, investigating a runtime error, or verifying that a change works correctly end-to-end.

No other project uses it yet

ngocsangyemSkill

mk:testing

ngocsangyem/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).

jabrenaSkill

321-frameworks-spring-boot-testing-unit-tests

jabrena/cursor-rules-java/skills/321-frameworks-spring-boot-testing-unit-tests/SKILL.md

Use when you need to write unit tests for Spring Boot applications — including pure unit tests with @ExtendWith(MockitoExtension.class) for @Service/@Component, slice tests with @WebMvcTest and @MockitoBean for controllers, @JsonTest for JSON serialization, parameterized tests with @CsvSource/@MethodSource, test profiles, and @TestConfiguration. For framework-agnostic Java use @131-java-testing-unit-testing. For integration tests use @322-frameworks-spring-boot-testing-integration-tests. This should trigger for requests such as Review Java code for Spring Boot unit tests; Apply best practices for Spring Boot unit tests in Java code; Write Mockito-first unit tests for Spring Boot services; Avoid unnecessary @SpringBootTest in Spring unit tests; Review Spring Boot slice-free unit test design. Part of Plinth Toolkit

starkware-libsSkill

writing-tests

starkware-libs/cairo/.claude/skills/writing-tests/SKILL.md

Use when writing or changing tests in this repo, deciding what to test or where a test belongs, adding a regression test for a bug fix, reviewing the test portion of a PR, deciding which golden outputs to bless and reviewing the blessed diff, or adding a benchmark. Trigger phrases include "add a test", "write tests for", "is this covered", "does this need a test", "review the tests here", "which layer should this test go in". Also use for the mechanics of the golden framework itself — the //! > file format, creating test_file_test! runners, or how CAIRO_FIX_TESTS works (covered in references/golden-framework.md).

fullstackheroSkill

testing-guide

fullstackhero/dotnet-starter-kit/.agents/skills/testing-guide/SKILL.md

Write tests for an FSH feature — xUnit + Shouldly + NSubstitute + AutoFixture, with naming and AAA conventions. Use when adding unit/handler/validator/entity tests. Full rules in .agents/rules/testing.md + integration-testing.md.

amElnagdySkill

test-guard

amElnagdy/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-lielReads credentialsSkill

e2e-testing

cohen-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.

Often used witheverything-claude-code·everything-claude-code-conventions·bun-runtime

MRCalderon3DSkill

web-testing

MRCalderon3D/everything-game-dev-code/skills/web/web-testing/SKILL.md

Test browser games with fast unit tests for pure logic, headless smoke tests, and a deliberate browser matrix.

TangleMLSkill

e2e-testing

TangleML/tangle-ui/.claude/skills/e2e-testing/SKILL.md

Playwright E2E testing best practices for this project. Use when writing, modifying, or reviewing E2E tests.

Often used witheverything-claude-code·everything-claude-code-conventions·bun-runtime