Playwright Browser Automation

What this skill does

**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: `~/.claude/plugins/marketplaces/playwright-skill/skills/playwright-skill`
- Manual global: `~/.claude/skills/playwright-skill`
- Project-specific: `<project>/.claude/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:
   ```bash
   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)

```bash
cd $SKILL_DIR
npm run setup
```

This installs Playwright and Chromium browser. Only needed once.

## Browser Modes

### Default: Connect to User's Chrome (Recommended)

Uses `connectToChrome()` to connect to Chrome with your existing profile (cookies, sessions, login state). This is the preferred method when testing authenticated apps.

```javascript
const helpers = require('./lib/helpers');

const { browser, page } = await helpers.connectToChrome();
// Your cookies and sessions are available!
await page.goto('http://localhost:3000/dashboard');
```

**How it works:**
- Launches Chrome with a dedicated `~/playwright-agent` profile via CDP (port 9222)
- If Chrome debug instance isn't running, it launches automatically
- Runs alongside your normal Chrome (separate instance)
- First time: log into your app in this Chrome window; sessions persist for future runs

**Manual launch (if needed):**
```bash
open -na "Google Chrome" --args --remote-debugging-port=9222 --user-data-dir="$HOME/playwright-agent"
```

### Alternative: Clean Browser Instance

For tests that need a fresh browser without any state:

```javascript
const { chromium } = require('playwright');
const browser = await chromium.launch({ headless: false });
const page = await browser.newPage();
```

## Execution Pattern

**Step 1: Detect dev servers (for localhost testing)**

```bash
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**

```javascript
// /tmp/playwright-test-page.js
const helpers = require('./lib/helpers');

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

(async () => {
  const { browser, page } = await helpers.connectToChrome();

  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');

  // Note: Don't close browser - keeps Chrome running for next automation
})();
```

**Step 3: Execute from skill directory**

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

## Common Patterns

### Test a Page (Multiple Viewports)

```javascript
// /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

```javascript
// /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

```javascript
// /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"]', '[email protected]');
  await page.fill('textarea[name="message"]', 'Test message');
  await page.click('button[type="submit"]');

  // Verify submission
  await page.waitForSelector('.success-message');
  console.log('✅ Form submitted successfully');

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

### Check for Broken Links

```javascript
const { chromium } = require('playwright');

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

  await page.goto('http://localhost:3000');

  const links = await page.locator('a[href^="http"]').all();
  const results = { working: 0, broken: [] };

  for (const link of links) {
    const href = await link.getAttribute('href');
    try {
      const response = await page.request.head(href);
      if (response.ok()) {
        results.working++;
      } else {
        results.broken.push({ url: href, status: response.status() });
      }
    } catch (e) {
      results.broken.push({ url: href, error: e.message });
    }
  }

  console.log(`✅ Working links: ${results.working}`);
  console.log(`❌ Broken links:`, results.broken);

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

### Take Screenshot with Error Handling

```javascript
const { chromium } = require('playwright');

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

  try {
    await page.goto('http://localhost:3000', {
      waitUntil: 'networkidle',
      timeout: 10000
    });

    await page.screenshot({
      path: '/tmp/screenshot.png',
      fullPage: true
    });

    console.log('📸 Screenshot saved to /tmp/screenshot.png');
  } catch (error) {
    console.error('❌ Error:', error.message);
  } finally {
    await browser.close();
  }
})();
```

###