qaskills

Make Claude Code write and maintain end-to-end tests like a senior SDET — Playwright and Cypress flows with stable locators, the Page Object Model, fixtures, reused auth state, network mocking, and flake-free CI. Claude Code E2E testing, done right.

Turn Claude Code into an autonomous QA agent — an explore, generate, run, heal, report loop that maps the app, writes tests for real user journeys, executes them, self-heals broken locators, and reports coverage. Build a QA agent skill for Claude Code.

BrowserBash is a vendor-independent, natural-language browser automation CLI. Drive a real browser from plain-English objectives or committable Markdown tests, run on local Chrome, CDP/Playwright MCP, Browserbase, LambdaTest, or BrowserStack, and stream NDJSON results with CI exit codes — using free local Ollama models or any cloud LLM.

The complete QA skill for Claude Code — turn Claude into an expert QA engineer that picks the right test type, writes reliable Playwright, Cypress, and pytest tests, eliminates flaky tests, enforces coverage, and wires up CI. Claude Code QA testing done right.

Write and run Artillery load tests with YAML phases and scenarios, CSV data payloads, the expect plugin for functional checks, and ensure thresholds that fail CI when latency or error budgets are breached.

Measure and enforce test coverage with Istanbul/nyc, c8, Jest, and Vitest. Covers branch versus line coverage, per-directory thresholds, CI gates, and correctly excluding generated code from reports.

Gray-box end-to-end testing for React Native apps with Detox. Covers .detoxrc.js configuration, build and test commands, matchers, device.launchApp control, automatic synchronization, and macOS CI pipelines.

Integration testing with real dependencies in throwaway Docker containers using the Testcontainers Node.js API - GenericContainer, exposed ports, wait strategies, module containers, Docker Compose environments, and reliable cleanup.

Enforce test quality with ESLint - eslint-plugin-jest, eslint-plugin-playwright, and eslint-plugin-testing-library rules in flat config, blocking focused tests, missing assertions, and flaky waits via a CI lint gate.

Black-box mobile UI testing with Maestro YAML flows - launchApp, tapOn, inputText, assertVisible, reusable runFlow subflows, environment parameters, JUnit reporting, and emulator-based CI pipelines.

Mock Service Worker v2 patterns - http and graphql request handlers, setupServer for Node test runs, setupWorker for the browser, per-test handler overrides, and strict unhandled-request policies.

Run mutation testing with StrykerJS for TypeScript/JavaScript and mutmut for Python to measure whether your test suite actually catches bugs, enforce mutation score thresholds, and keep runs fast with incremental mode in CI.

Automate Chrome with Puppeteer for scraping, screenshots, PDF generation, and E2E checks — correct launch options, reliable waiting with locators and waitForSelector, request interception, and headless CI execution.

SOAP web service testing including WSDL validation, XML schema testing, WS-Security, and SOAP fault handling verification.

Test Node.js HTTP APIs in-process with SuperTest — request(app) without binding a port, chained .expect assertions, auth headers, JSON body validation, and Jest integration with proper async/await patterns.

Practice strict red-green-refactor test-driven development — write one failing test first, make it pass with the minimum code, then refactor under green, with worked cycles in Jest and pytest, AAA structure, and behavior-based test naming.

Write fast unit and integration tests with Vitest — vitest.config.ts setup, vi.fn and vi.mock module mocking, fake timers, snapshots, V8 coverage with thresholds, workspaces for monorepos, and in-source testing.

Vue.js component testing using Vue Test Utils with mount/shallow mount, event simulation, Vuex/Pinia store testing, and composition API testing.

Test Vue 3 components with Vue Test Utils and Vitest — mount vs shallowMount, finding and triggering DOM, asserting props and emitted events, awaiting async updates, and mocking Pinia stores and Vue Router.

Build WebdriverIO E2E suites — wdio.conf.ts setup, $ and $$ selectors, auto-wait and waitUntil, Mocha framework structure, page objects, parallel capabilities, and services for visual testing and Appium mobile.

Author effective Cursor rules in .cursor/rules/*.mdc - YAML frontmatter (description, globs, alwaysApply), the four rule types, scoped QA rules, subagents, and structure that actually steers the model.

Teaches the agent the right way to mock in Jest — jest.fn, mockImplementation, mockResolvedValue, jest.mock factories, spyOn with restore, and isolating modules like axios.

Grade LLM and agent traces with OpenAI Evals - build datasets, configure string/python/model graders, run eval suites, and gate agent behavior changes in CI.

Teaches the agent to build resilient Playwright locators with .filter (hasText/has/hasNot), narrow lists, and reason correctly about visibility, waitFor states, and timeouts.

Teaches the agent to handle popups, new tabs, and multiple browser windows in Playwright using waitForEvent('page'), context pages, and reliable tab switching for OAuth and target=_blank links.

Teaches the agent when and how to use page.evaluate, evaluateHandle, and exposeFunction in Playwright — passing arguments safely, reading DOM/JS state, and why locators should be preferred for actions.

Teaches the agent to structure tests with test.step, attach evidence and annotations via test.info, use soft assertions, and produce readable, debuggable Playwright HTML reports.

Opinionated pytest patterns for AI agents - conftest fixture scoping, parametrize, markers, pyproject config, coverage, xdist parallelism, mocking, and AAA-structured test naming.

Measure RAG pipeline quality with context precision/recall, faithfulness, answer relevancy, and groundedness using Ragas and DeepEval, with golden datasets and pass/fail thresholds.

Gate RAG pipelines in CI with versioned golden eval sets, per-metric thresholds, baseline drift detection, and a build that fails when retrieval or answer quality regresses.

Port a Java Selenium suite to Playwright TypeScript - locator mapping, WebDriverWait to auto-wait, Grid to workers, Page Object port, with before/after code and a phased checklist.

Teaches the agent to speed up Node integration tests with Testcontainers reuse — withReuse(true), TESTCONTAINERS_REUSE_ENABLE, the .testcontainers.properties opt-in, stable hashing for Postgres/MySQL/Kafka, and Ryuk/CI caveats.

Teaches the agent to migrate a Jest suite to Vitest — vi.mock and the globals shim, vitest.config workspaces/projects, coverage, browser mode, and Vitest v4 breaking changes.

Pull weekly/monthly performance metrics for qaskills.sh from Google Analytics 4 (GA4) and Google Search Console (GSC) via Claude in Chrome. Returns traffic, channels, top queries, top pages, growth deltas in a single report.

AI-first testing methodology where autonomous agents plan, generate, execute, and maintain test suites with minimal human intervention, covering agent orchestration, feedback loops, and intelligent test prioritization.

Comprehensive evaluation patterns for AI agents including multi-turn conversation testing, LLM-as-judge frameworks, benchmark suites, regression detection, and systematic eval pipelines for measuring agent quality and safety.

Systematic patterns for prompting AI coding agents to generate high-quality tests including prompt engineering for test creation, coverage-driven generation, mutation-aware testing, and review checklists for AI-generated test code.

Comprehensive API security testing based on OWASP API Security Top 10 including broken authentication, injection attacks, rate limiting, BOLA/BFLA vulnerabilities, and automated security scanning with ZAP and custom scripts.

Cloud-based cross-browser and cross-device testing with BrowserStack including Automate, App Automate, Percy visual testing, Observability, and integration with Playwright, Selenium, and CI/CD pipelines.

Fast test execution with Bun's built-in test runner including snapshot testing, mocking, code coverage, lifecycle hooks, DOM testing with happy-dom, and migration from Jest and Vitest to Bun test.