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    🧪 Webapp Tester

    by JustHandled Labs

    2

    Run real Playwright E2E tests on your web app: login, checkout, and form flows across desktop and mobile viewports, with screenshots, traces, and console logs captured on every failure. Catches broken flows and UI regressions before release, and tells you the likely fix, not just that something broke.

    $15

    · or 75 credits

    30-day refund guarantee

    Secure checkout via Stripe

    About this skill

    Professional E2E Browser Testing

    The WebApp Tester skill provides a production-grade automated testing workflow using Playwright. It solves the common problem of "flaky" or shallow AI-generated tests by implementing a structured, artifact-driven approach to browser automation. Instead of just clicking buttons and hoping for the best, this skill ensures your AI agent acts like a professional QA engineer.

    What it does

    • Comprehensive Coverage: Tests flows across desktop and mobile viewports (iOS/Android emulation).
    • Deep Diagnostics: Automatically captures screenshots, Playwright traces, and console logs on failure.
    • Smart Auth: Manages persistent authentication states, preventing redundant login steps across test suites.
    • Visual Regression: Implements screenshot comparison to catch UI regressions that functional tests might miss.
    • Step-Level Reporting: Provides clear, human-readable summaries of exactly where a flow broke.

    Why use this skill?

    Prompting an AI to "test my site" often results in generic scripts that fail on modern React/Next.js apps. This skill enforces test.step() patterns, proper locators, and environmental awareness. It handles dev servers, manages mobile emulation profiles, and produces actionable debugging data that tells you exactly why a test failed—saving you hours of manual reproduction.

    Supported Tools

    • Frameworks: Playwright (primary), Chromium, WebKit, Firefox.
    • Environments: Local dev servers (localhost), staging, and production.
    • Contexts: Mobile Safari, Mobile Chrome, Desktop Responsive.
    testing
    browser-automation
    e2e-testing
    playwright
    qa
    typescript

    Details

    How to install

    Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.

    Security Scanned

    Passed automated security review

    Permissions

    Terminal / Shell
    Browser
    Environment Variables
    Read Files
    Write Files

    File Scopes

    ./test-results/**/*
    ./tests/**/*
    **/*.spec.ts
    **/*.test.js

    WebApp Tester needs terminal access to run Playwright test commands—the industry standard for browser testing in Node.js environments. These commands launch real browsers (Chromium, Firefox, WebKit) that execute test flows like login, checkout, and form submission. No system modifications occur; the skill only reads test configurations and writes test artifacts (reports, screenshots, videos) to help developers debug failures. The skill never modifies source code, never installs software beyond Playwright's documented setup, and makes no external network calls of its own. All testing happens locally on the user's machine against their chosen test environment (localhost, staging, or production URL). For first-time users, the skill will prompt the user to run npx playwright install if browsers are missing—it does not attempt to install them automatically without permission.

    Creator

    JustHandled Labs

    JustHandled Labs builds focused agent skills for the work nobody wants to do by hand. Each one is a single repeatable job done well: catching the security and data mistakes that quietly ship, keeping docs and tests honest, gating the commands an agent is about to run, sharpening writing, and handling the founder chores around launches, outreach, and brand setup. Not generic AI productivity. Specific workflows that are easy to run, review, and repeat. Maintained by H.J. Westerfield, with a background in communications, editing, project coordination, customer support, and practical AI systems. Tools for people who want useful automation without theatrical complexity.

    Frequently Asked Questions

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