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

remotion-devSkill

writing-tests

remotion-dev/remotion/.agents/skills/writing-tests/SKILL.md

Guidance for explicitly requested new tests and for updating or reviewing existing tests in the Remotion repository.

amplifthqSkill

writing-tests

amplifthq/openmeld/.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.

rundeckSkill

write-jest-tests

rundeck/rundeck/.claude/skills/write-jest-tests/SKILL.md

Write Vue component unit tests. Use when the user asks to write unit tests, write Jest tests, write Vue tests, add tests to a component, or test a Vue component.

No other project uses it yet

techniqSkill

svelte-testing

techniq/layerchart/.claude/skills/svelte-testing/SKILL.md

Fix and create Svelte 5 tests with vitest-browser-svelte and Playwright. Use when fixing broken tests, debugging failures, writing unit/SSR/e2e tests, or working with vitest/Playwright.

No other project uses it yet

GoogleSkill

crosvm-testing

google/crosvm/.agents/skills/crosvm_testing/SKILL.md

Skill to assist with running tests and managing test VMs in the crosvm repository.

metabaseReads credentialsSkill

mutation-testing

metabase/metabase/.claude/skills/mutation-testing/SKILL.md

Run mutation testing on a Clojure namespace, generate tests to kill surviving mutations, and open draft PRs with Linear issue tracking.

carbon-languageSkill

Toolchain tests

carbon-language/carbon-lang/.agents/skills/toolchain_tests/SKILL.md

name: Toolchain tests description: Instructions for authoring, structuring, and running toolchain tests using the file_test infrastructure. --- # Toolchain tests ## Introduction This skill provides guidelines and patterns for creating and updating

wesmSkill

testing-without-tautologies

wesm/agentsview/.agents/skills/testing-without-tautologies/SKILL.md

Use when creating, editing, fixing, or reviewing tests; when adding mocks, fakes, assertions, unit tests, PG integration tests, frontend component tests, or Playwright e2e tests; or when changing tests after failures.

daskSkill

shakedown-flaky-test

dask/distributed/.agents/skills/shakedown-flaky-test/SKILL.md

Shake down a flaky test (or subset of flaky tests) in dask/distributed. Reproduce locally with pytest-repeat, then either fix-and-verify locally or drive the `torture-test` GitHub Action via `gh` until CI is green. Use when the user says things like "debug flaky test <test name>", "fix intermittent failures in test <test name>", "torture test <test name>", "track down a flaky test", "reproduce a flaky failure", "fix intermittent test failures", or otherwise asks to shake out / harden a test that fails only sometimes.

PostHogSkill

fixing-flaky-tests

PostHog/posthog/.agents/skills/fixing-flaky-tests/SKILL.md

Guides an agent through reproducing, root-causing, fixing, and validating flaky tests in the PostHog monorepo. Use when a test fails intermittently in CI but passes on rerun or locally, when `hogli ci:insights` or the debugging-ci-failures skill classifies a failure as a flaky test, when given a GitHub Actions URL for a flaky job, when asked to check Trunk Flaky Tests for a test, PR, or master, or when asked to deflake, stabilize, or fix a flaky Jest, pytest, or Playwright test. Core discipline: reproduce locally before changing anything, fix the root cause (never mask it with sleeps, retries, or bigger timeouts), and prove the fix with an N-run validation loop sized to the observed failure rate. Stabilizing is not the only valid outcome — the skill also gates whether the test should exist, so deleting a test that catches nothing real, or re-leveling one that flakes because of the level it runs at, are first-class endings.

reactSkill

test

react/react/.claude/skills/test/SKILL.md

Use when you need to run tests for React core. Supports source, www, stable, and experimental channels.

paperclipaiSkill

test-audit

paperclipai/paperclip/.agents/skills/test-audit/SKILL.md

Garden the test suite by finding and removing redundant, vacuous, or implementation-coupled tests while preserving useful regression coverage. Use for test audits, test pruning, duplicate coverage, or reducing CI test cost. Supports focused cleanups and coordinated audit campaigns.

withkynamSkill

vc-web-testing

withkynam/vibecode-pro-max-kit/.claude/skills/vc-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.

SonarSourceSkill

test-quality-standards

SonarSource/SonarJS/.claude/skills/test-quality-standards/SKILL.md

Provides test quality standards and best practices. Use when writing test cases, creating unit tests, implementing tests, or refining/reviewing test code. Essential for test generation and test refinement phases.

NVIDIA-NeMoSkill

parity-testing

NVIDIA-NeMo/Automodel/.agents/contributor-skills/parity-testing/SKILL.md

Verify NeMo AutoModel models against HuggingFace references (state dicts, forward pass). Use for loss divergence, output mismatches, or checking state-dict mappings.

tldrawReads credentialsSkill

write-unit-tests

tldraw/tldraw/skills/write-unit-tests/SKILL.md

Writing unit and integration tests for the tldraw SDK. Use when creating new tests, adding test coverage, or fixing failing tests in packages/editor or packages/tldraw. Covers Vitest patterns, TestEditor usage, and test file organization.

NVIDIASkill

trtllm-test-specialist

NVIDIA/TensorRT-LLM/.claude/skills/trtllm-test-specialist/SKILL.md

Runs model-level and module-level tests for TensorRT-LLM. First classifies the test scope (module test or model test), then dispatches to the appropriate workflow. Model tests are further classified by type (functionality/smoke test, benchmark, or evaluation). Prompts the user for parallelism parameters (tp, ep, dp), dataset paths, device type, or a config file as needed. All test execution is delegated to trtllm-case-executor.

MicrosoftDeletes or force-pushesSkill

cli-e2e-testing

microsoft/aspire/.agents/skills/cli-e2e-testing/SKILL.md

Use when creating, modifying, debugging, or reviewing Aspire CLI end-to-end tests that use Hex1b terminal automation under tests/Aspire.Cli.EndToEnd.Tests/.

MaxMiksaReads credentialsSkill

senior-qa

MaxMiksa/Auto-Company/.claude/skills/senior-qa/SKILL.md

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.

Often used withcommunity-led-growth·micro-saas-launcher·ux-audit-rethink

ryokun6Reads credentialsSkill

write-tests

ryokun6/ryos/.cursor/skills/write-tests/SKILL.md

Write and run ryOS tests with Bun's native test runner (bun:test). Covers unit/wiring tests (no server) vs API integration tests (require the standalone API server), shared HTTP helpers, and the package.json suite commands. Use when adding tests, writing test coverage for a change, or running/triaging the test suite.

Often used withclose-spec·compare-screenshots·audit-agents