What problem does it solve? Manual QA testing and site verification are slow and hard to reproduce. This Skill gives an AI agent a persistent headless Chromium browser that can navigate URLs, interact with page elements, verify page state, and capture visual evidence at roughly 100ms per command after startup. ## Core Features & Use Cases - Page Interaction & State Assertions: Navigate, click, fill forms, upload files, handle dialogs, and assert element states (visible, enabled, checked, focused) using accessibility-tree snapshots with @e refs. - Visual Evidence & Diffing: Take annotated screenshots, capture responsive layouts at mobile/tablet/desktop viewports, diff snapshots before and after actions, and compare staging versus production pages. - Session Persistence & Handoff: Cookies, tabs, and login sessions persist between commands, with a handoff mode that opens a visible Chrome window so a human can solve CAPTCHAs or MFA before the AI resumes. - Use Case: After deploying a new checkout flow, ask the agent to open the staging site, fill the form, submit it, verify the success message appears, and attach an annotated screenshot as bug-report evidence. ## Quick Start Ask the agent to open your staging site in the browser, walk through the login flow, and take a screenshot of the result.