What problem does it solve? End-to-end tests are often flaky, slow, and hard to maintain, causing teams to lose trust in their test suites and ship bugs to production. This Skill provides proven patterns for building deterministic, fast E2E tests that catch regressions on critical user journeys. ## Core Features & Use Cases - Playwright Patterns: Page Object Model, custom fixtures for test data, proper waiting strategies, network mocking and interception, visual regression testing, and parallel sharding. - Cypress Patterns: Custom commands, cy.intercept for API mocking, and configuration best practices. - Quality & Debugging: Accessibility testing with axe-core, trace viewer debugging, test.step reporting, and guidance on avoiding flaky selectors and fixed timeouts. - Use Case: When setting up CI/CD test pipelines, use this Skill to configure Playwright with retries, sharding across workers, and failure screenshots so your team gets reliable signal on every pull request. ## Quick Start Write a Playwright end-to-end test for the login flow using the Page Object Model pattern with proper waiting strategies.