Langwright

Langwright is a LangChain-powered Playwright testing library that makes end-to-end tests feel more LLM-native. It preserves the familiar Playwright workflow while allowing browser interactions and assertions to be written in natural language.

Playwright

import { test, expect } from '@playwright/test';

test('has title', async ({ page }) => {
  await page.goto('https://playwright.dev/');
  await expect(page).toHaveTitle(/Playwright/);
});

test('get started link', async ({ page }) => {
  await page.goto('https://playwright.dev/');
  await page.getByRole('link', { name: 'Get started' }).click();
  await expect(
    page.getByRole('heading', { name: 'Installation' }),
  ).toBeVisible();
});

Langwright

import { test, scenario } from '@hakjuoh/langwright/test';

test('has title', async () => {
  await scenario(
    `Go to https://playwright.dev/.`,
    `The page title should contain Playwright.`,
  );
});

test('get started link', async () => {
  await scenario(
    `Go to https://playwright.dev/. Click the Get started link.`,
    `The Installation heading should be visible.`,
  );
});

Each scenario(steps, expect?) runs a four-stage pipeline — generate → execute → heal → report. A Generator agent converts the natural-language scenario into Playwright code (inspecting the live page for robust locators), Playwright executes that code directly (no LLM in the loop), and on failure a Healer agent diagnoses the cause and proposes a fix. This mirrors Playwright's test agents: the test plan is authored inline as natural language, so Langwright fuses the Generator and Healer roles into a single run.