Jest agent skills for Claude Code, Codex and other agents.

Enforce Sentry React Native SDK test conventions for naming, structure, mocking, and fixtures with Jest.

getsentry/sentry-react-native

Find and safely remove unused ("dead") npm dependencies in RedisInsight using a grep + leaf-check + build-gate recipe.

redis/RedisInsight

Write Jest integration and unit tests for the Grafana Synthetic Monitoring app using React Testing Library, MSW, and src/test helpers.

grafana/synthetic-monitoring-app

Write tests for datadog-ci commands and helpers using established repository patterns.

DataDog/datadog-ci

Run unit tests for the Cosmos Explorer project. An agent skill from Azure/cosmos-explorer.

Azure/cosmos-explorer

Write tests using React Native Testing Library (RNTL) v13 and v14 (@testing-library/react-native).

callstackincubator/agent-skills

Write and review React/TypeScript tests for Sentry's frontend using Jest and React Testing Library.

getsentry/sentry

Unit/integration testing standards for RedisInsight using Jest and Testing Library: test structure, the renderComponent helper, faker for test data, mocking patterns, and waitFor instead of fixed…

redis/RedisInsight

Analyze assertion quality, depth, variety, and false confidence in existing tests.

dotnet/skills

ALWAYS USE whenever asked to write, add, or generate unit tests for existing code in xUnit, MSTest, NUnit, pytest, Vitest/Jest, Go, or another framework, including "tests only for" one helper…

dotnet/skills

Vitest fast unit testing framework powered by Vite with Jest-compatible API.

JetBrains/skills

Quality standards for Salesforce Lightning Web Components (LWC), Aura components, and Visualforce pages.

github/awesome-copilot

React 18.3.1 and React 19 dependency compatibility matrix. An agent skill from github/awesome-copilot.

github/awesome-copilot

Analyzes the variety and depth of assertions across test suites in any language.

microsoft/testfx

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…

microsoft/testfx

Performs pseudo-mutation analysis on production code in any language to find gaps in existing test suites.

microsoft/testfx

Deep-dive audit using the full testsmells.org 19-smell academic catalog for tests in any language.

microsoft/testfx

Analyzes test suites in any language and tags each test with a standardized set of traits (positive, negative, critical-path, boundary, smoke, regression, integration, performance, security).

microsoft/testfx

Best practices for writing JavaScript/TypeScript tests using Jest, including mocking strategies, test structure, and common patterns.

github/awesome-copilot

Audits existing test code in any language for anti-patterns and quality issues — produces a severity-ranked report (Critical / Warning / Info) with concrete code-level fixes.

microsoft/testfx

A skill your agent uses when writing a Storybook story for a component gated on a feature flag — boolean flags or multivariate/experiment-arm variants.

PostHog/posthog-foss

Guides an agent through reproducing, root-causing, fixing, and validating flaky tests in the PostHog monorepo.

PostHog/posthog-foss

A skill your agent uses when authoring NEW manual test cases in Gherkin format from a feature description, Jira ticket, acceptance criteria, PR, or design doc — the kind a QA engineer imports into…

bitwarden/ai-plugins

Gates whether a new test should exist and forces it to be efficient, protecting CI from low-value test bloat.

PostHog/posthog-foss

Jest patterns for React Native style tests: TDD discipline, mock factory functions, module and GraphQL hook mocking, custom render helpers and anti-patterns to avoid.

ChrisWiles/claude-code-showcase

Reviews newly written or edited tests against nine rules that cut test bloat, such as mock-heavy checks and near-duplicate cases, before they are committed.

amElnagdy/guard-skills

Generate React Native Reanimated animation code for React Native apps.

gluestack/gluestack-ui

Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest).

pixel-point/animate-text

Reference guide for writing and running Langflow frontend accessibility tests with axe (Jest) and IBM Equal Access (Playwright page.runA11yScan).

langflow-ai/langflow

Designs and implements testing strategies for any codebase. An agent skill from CloudAI-X/claude-workflow-v2.

CloudAI-X/claude-workflow-v2

Guides an agent through probing an unfamiliar project's test setup, then choosing a red-light-first testing strategy matched to the task type.

huiliyi37/Tianshu-harness

Guide a new contributor through the rundeck OSS repo. An agent skill from rundeck/rundeck.

rundeck/rundeck

Plan, implement, and debug frontend tests: unit/integration/E2E/visual/a11y.

chongdashu/vibejam-starter-pack

Test @data-client/react with renderDataHook and mountDataClient - jest unit tests, fixtures, interceptors, MockResolver, mock responses, nock HTTP mocking, fake timers for polling/subscription…

reactive/data-client

A skill your agent uses when building, running, testing, or bundling JavaScript/TypeScript applications.

galfrevn/apollo

Write Vue component unit tests. An agent skill from rundeck/rundeck.

rundeck/rundeck

Plan, implement, and debug frontend tests: unit/integration/E2E/visual/a11y.

chongdashu/vibejam-starter-pack

Verify Google Sheets Argento locally: launch the Node build/Jest stack and the static docs site, then prove formula behavior (DOLAR, CEDEAR, caución) and the public CEDEAR JSON.

ferminrp/google-sheets-argento

Write or extend Jest tests for OpenPlayerJS to this repo's exact conventions — makeCore factories, typed internals handles instead of as any, media property mocking, fake timers, ads/vast mocks, and…

openplayerjs/openplayerjs

Drives test-first development through the RED, GREEN, REFACTOR cycle, with a config switch that selects between TDD and a DDD workflow for existing code.

modu-ai/moai-adk

Configure Bun's built-in test runner with Jest-compatible APIs.

involvex/youtube-music-cli

Jest + React Testing Library best practices for Wonder Blocks unit tests.

Khan/wonder-blocks

Migrates an application to Ts.ED v8 from v7, with pointers for v6 and plain Express apps.

tsedio/tsed

Test Radix NG primitives across every layer and pick the RIGHT one for a change: Vitest unit (zoneless), jest-axe a11y, Playwright browser regression (apps/visual-regression), SSR…

radix-ng/primitives

Enforces strict red-green-refactor, with a failing test first, the minimum code to pass it, then cleanup, and a quick reference for common test runners.

zereight/gitlab-mcp

Migrate a TypeScript/JavaScript codebase from @cashu/cashu-ts v2 to v4.

shopstr-eng/shopstr

Test @data-client/vue composables and components - renderDataCompose, mountDataClient, fixtures, jest, nock HTTP mocking, polling/subscription tests with fake timers, useSuspense, useLive…

reactive/data-client

AutoAnimate (@formkit/auto-animate) zero-config animations for React.

secondsky/claude-skills