Drive a real Chrome browser through the Chrome DevTools MCP server to verify web changes — screenshots at desktop/tablet/mobile for layout, a performance trace with Core Web Vitals against thresholds for perf-relevant changes, console-error and failed-request checks for new features. Every finding ships with its screenshot, metric, or log excerpt; nothing passes on an unevidenced "looks fine". Use when asked to verify a web change, check performance, audit a page, or test responsive behavior.
