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playwright-testing

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Writes and reviews end-to-end Playwright tests that survive UI refactors and never fail on timing - resilient locators, web-first assertions, isolated state, and a flake policy with quarantine rules. Use when someone asks "write a Playwright test for this flow", "why is this e2e test flaky", "how do I wait for this element", "what selector should I use", or is setting up a Playwright suite and CI config. Do NOT use for consumer/provider contract tests of API boundaries - use contract-test-writer instead; for turning product requirements into an e2e scenario inventory before any code - use e2e-scenario-author instead; for systematically diagnosing an already-flaky suite - use flaky-test-detangler instead; for designing reusable test fixtures and factories - use test-data-builder instead.

skills/playwright-testing/SKILL.md

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Oct 13, 2026
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# Playwright Testing

A test should fail only when the app is broken - never because of timing, test order, or a CSS refactor. The costly failure mode this skill prevents is the suite the team stops trusting: once engineers rerun red builds by reflex, the suite catches nothing and its entire cost is waste.

## Operating procedure

### Step 1: gather inputs

Before writing a test, collect (label guesses as guesses):

1. The user behavior under test, phrased as intent ("user can reset password"), not implementation.
2. What is in scope: the backend too, or frontend only (decides whether to mock the network).
3. How test state is created and destroyed (API seeding, DB reset, per-test user).
4. Whether the app renders accessible roles/labels (decides locator strategy).
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