lambdatest/smartui-skill
smartui-skill/SKILL.md
Generates SmartUI visual regression test configurations for screenshot comparison on TestMu AI cloud. Framework-agnostic — works with Playwright, Selenium, Cypress, Puppeteer. Use when user mentions "SmartUI", "visual regression", "screenshot comparison", "visual testing". Triggers on: "SmartUI", "visual regression", "screenshot comparison", "pixel diff", "visual testing LambdaTest".
$ install --global
skillsauthnpx skillsauth add lambdatest/agent-skills smartui-skillInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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TrivyContainer and dependency vulnerability scanner
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Last scanned: Apr 15, 2026, 1:08 PM18.3s2 files scanned
SKILL.md
- name:
- smartui-skill
- description:
- >
- category:
- visual-testing
- license:
- MIT
- author:
- TestMu AI
- version:
- 1.0
SmartUI Visual Regression Skill
Core Patterns
Playwright + SmartUI SDK
const { chromium } = require('playwright');
const { smartuiSnapshot } = require('@lambdatest/smartui-cli');
(async () => {
const browser = await chromium.launch();
const page = await browser.newPage();
await page.goto('https://example.com');
await smartuiSnapshot(page, 'Homepage');
await page.goto('https://example.com/login');
await smartuiSnapshot(page, 'Login Page');
await browser.close();
})();
Selenium + SmartUI
// Take SmartUI screenshot
((JavascriptExecutor) driver).executeScript(
"smartui.takeScreenshot=Login Page"
);
CLI Execution
# Install
npm install @lambdatest/smartui-cli --save-dev
# Configure
npx smartui config:create smartui.config.json
# Execute
npx smartui exec -- node test.js
# or with Playwright
npx smartui exec -- npx playwright test
smartui.config.json
{
"web": {
"browsers": ["chrome", "firefox", "safari"],
"viewports": [[1920, 1080], [1366, 768], [375, 812]]
},
"waitForPageRender": 5000,
"waitForTimeout": 1000
}
SmartUI with Storybook
npx smartui storybook http://localhost:6006 --config smartui.config.json
Approval Workflow
- First run creates baseline screenshots
- Subsequent runs compare against baseline
- Differences highlighted in dashboard
- Approve/reject changes in LambdaTest SmartUI dashboard
- Approved screenshots become new baseline
Anti-Patterns
| Bad | Good | Why |
|-----|------|-----|
| No viewport config | Multiple viewports | Responsive issues |
| No wait for render | waitForPageRender | Incomplete screenshots |
| Screenshot everything | Key pages/components | Noise reduction |
| No approval process | Review diffs in dashboard | Catch regressions |
Cloud Authentication
Set environment variables:
export PROJECT_TOKEN="your-smartui-project-token" # From SmartUI dashboard
export LT_USERNAME="your-username" # For Selenium/Playwright cloud
export LT_ACCESS_KEY="your-access-key" # For Selenium/Playwright cloud
CLI approach (uses PROJECT_TOKEN):
npx smartui exec -- npx playwright test
Selenium Cloud approach (uses LT_USERNAME/LT_ACCESS_KEY):
// Capabilities include SmartUI options
HashMap<String, Object> ltOptions = new HashMap<>();
ltOptions.put("user", System.getenv("LT_USERNAME"));
ltOptions.put("accessKey", System.getenv("LT_ACCESS_KEY"));
ltOptions.put("build", "SmartUI Build");
ltOptions.put("smartUI.project", "My SmartUI Project");
ChromeOptions options = new ChromeOptions();
options.setCapability("LT:Options", ltOptions);
WebDriver driver = new RemoteWebDriver(
new URL("https://hub.lambdatest.com/wd/hub"), options);
Quick Reference
| Task | Command |
|------|---------|
| Install | npm install @lambdatest/smartui-cli |
| Init config | npx smartui config:create smartui.config.json |
| Run | npx smartui exec -- <test command> |
| Storybook | npx smartui storybook <url> |
| Dashboard | https://smartui.lambdatest.com |
Deep Patterns
For advanced patterns, debugging guides, CI/CD integration, and best practices,
see reference/playbook.md.
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