What problem does it solve? Manually verifying that a deployed feature actually works across pages, viewports, and user journeys is slow and error-prone. This Skill drives a real browser through smoke tests, interaction checks, visual regression, and accessibility audits so broken layouts, dead links, and console errors are caught before shipping. ## Core Features & Use Cases - Four-phase QA workflow: smoke test (console errors, network failures, Core Web Vitals), interaction test (nav links, forms, auth flows), visual regression (screenshots at 375px/768px/1440px against baselines), and accessibility audit (axe-core, WCAG 2.2 AA, keyboard navigation). - Safety-first defaults: read-only by default, mutating journeys (checkout, payment, delete) require explicit opt-in and a staging URL, with test credentials only and PII redaction in screenshots. - Structured verdict report: outputs a Markdown QA report ending in SHIP, SHIP WITH FIXES, DO NOT SHIP, or INCONCLUSIVE when no visual baseline exists. - Use Case: After deploying a PR to a preview URL, ask the agent to run browser QA and receive a report flagging a hero section overflow on mobile and two WCAG contrast violations before merge. ## Quick Start Run browser QA on the staging deployment at https://staging.example.com and give me the full report with screenshots at mobile and desktop widths.