Playwright Browser Automation

IMPORTANT - Path Resolution: This skill can be installed in different locations (plugin system, manual installation, global, or project-specific). Before executing any commands, determine the skill directory based on where you loaded this SKILL.md file, and use that path in all commands below. Replace $SKILL_DIR with the actual discovered path.

Common installation paths:

• Plugin system: <plugin-root>/​skills/​playwright-skill
• Manual global: <agent-home>/​skills/​playwright-skill
• Project-specific: <project>/​.agent/​skills/​playwright-skill

Playwright Browser Automation

General-purpose browser automation skill. I'll write custom Playwright code for any automation task you request and execute it via the universal executor.

CRITICAL WORKFLOW - Follow these steps in order:

1. Auto-detect dev servers - For localhost testing, ALWAYS run server detection FIRST:

   cd $SKILL_DIR && node -e "require('./​lib/​helpers').detectDevServers().then(servers => console.log(JSON.stringify(servers)))"
   

   • If 1 server found: Use it automatically, inform user
   • If multiple servers found: Ask user which one to test
   • If no servers found: Ask for URL or offer to help start dev server

2. Write scripts to /​tmp - NEVER write test files to skill directory; always use /​tmp/​playwright-test-*.js

3. Use visible browser by default - Always use headless: false unless user specifically requests headless mode

4. Parameterize URLs - Always make URLs configurable via environment variable or constant at top of script

How It Works

1. You describe what you want to test/​automate
2. I auto-detect running dev servers (or ask for URL if testing external site)
3. I write custom Playwright code in /​tmp/​playwright-test-*.js (won't clutter your project)
4. I execute it via: cd $SKILL_DIR && node run.js /​tmp/​playwright-test-*.js
5. Results displayed in real-time, browser window visible for debugging
6. Test files auto-cleaned from /​tmp by your OS

Setup (First Time)

cd $SKILL_DIR
npm run setup

This installs Playwright and Chromium browser. Only needed once.

Execution Pattern

Step 1: Detect dev servers (for localhost testing)

cd $SKILL_DIR && node -e "require('./​lib/​helpers').detectDevServers().then(s => console.log(JSON.stringify(s)))"

Step 2: Write test script to /​tmp with URL parameter

// /​tmp/​playwright-test-page.js
const { chromium } = require('playwright');

// Parameterized URL (detected or user-provided)
const TARGET_URL = 'http://localhost:3001'; // <-- Auto-detected or from user

(async () => {
  const browser = await chromium.launch({ headless: false });
  const page = await browser.newPage();

  await page.goto(TARGET_URL);
  console.log('Page loaded:', await page.title());

  await page.screenshot({ path: '/​tmp/​screenshot.png', fullPage: true });
  console.log('📸 Screenshot saved to /​tmp/​screenshot.png');

  await browser.close();
})();

Step 3: Execute from skill directory

cd $SKILL_DIR && node run.js /​tmp/​playwright-test-page.js

Common Patterns

Test a Page (Multiple Viewports)

// /​tmp/​playwright-test-responsive.js
const { chromium } = require('playwright');

const TARGET_URL = 'http://localhost:3001'; // Auto-detected

(async () => {
  const browser = await chromium.launch({ headless: false, slowMo: 100 });
  const page = await browser.newPage();

  // Desktop test
  await page.setViewportSize({ width: 1920, height: 1080 });
  await page.goto(TARGET_URL);
  console.log('Desktop - Title:', await page.title());
  await page.screenshot({ path: '/​tmp/​desktop.png', fullPage: true });

  // Mobile test
  await page.setViewportSize({ width: 375, height: 667 });
  await page.screenshot({ path: '/​tmp/​mobile.png', fullPage: true });

  await browser.close();
})();

Test Login Flow

// /​tmp/​playwright-test-login.js
const { chromium } = require('playwright');

const TARGET_URL = 'http://localhost:3001'; // Auto-detected

(async () => {
  const browser = await chromium.launch({ headless: false });
  const page = await browser.newPage();

  await page.goto(`${TARGET_URL}/​login`);

  await page.fill('input[name="email"]', '[email protected]');
  await page.fill('input[name="password"]', 'password123');
  await page.click('button[type="submit"]');

  // Wait for redirect
  await page.waitForURL('**/​dashboard');
  console.log('✅ Login successful, redirected to dashboard');

  await browser.close();
})();

Fill and Submit Form

// /​tmp/​playwright-test-form.js
const { chromium } = require('playwright');

const TARGET_URL = 'http://localhost:3001'; // Auto-detected

(async () => {
  const browser = await chromium.launch({ headless: false, slowMo: 50 });
  const page = await browser.newPage();

  await page.goto(`${TARGET_URL}/​contact`);

  await page.fill('input[name="name"]', 'John Doe');
  await page.fill('input[name="email"