Lighthouse MCP

// Chrome configuration constants export const CHROME_FLAGS = ["--headless", "--no-sandbox", "--disable-dev-shm-usage"]; // Default screen dimensions export const SCREEN_DIMENSIONS = { desktop: { width: 1350, height: 940 }, mobile: { width: 360, height: 640 }, } as const; // Throttling configuration export const THROTTLING_CONFIG = { enabled: { rttMs: 150, throughputKbps: 1638.4, cpuSlowdownMultiplier: 4, }, disabled: { rttMs: 0, throughputKbps: 10 * 1024, cpuSlowdownMultiplier: 1, }, } as const; // Key performance metrics export const KEY_METRICS = [ "first-contentful-paint", "largest-contentful-paint", "total-blocking-time", "cumulative-layout-shift", "speed-index", "interactive", ] as const; // LCP optimization opportunities export const LCP_OPPORTUNITIES = [ "render-blocking-resources", "unused-css-rules", "unused-javascript", "modern-image-formats", "uses-optimized-images", "efficient-animated-content", "preload-lcp-image", "uses-text-compression", ] as const; // Security audit IDs export const SECURITY_AUDITS = [ "is-on-https", "uses-http2", "no-vulnerable-libraries", "csp-xss", "external-anchors-use-rel-noopener", ] as const; // Performance budget metric mappings export const BUDGET_METRIC_MAPPINGS = [ { key: "firstContentfulPaint", metric: "first-contentful-paint", unit: "ms" }, { key: "largestContentfulPaint", metric: "largest-contentful-paint", unit: "ms" }, { key: "totalBlockingTime", metric: "total-blocking-time", unit: "ms" }, { key: "cumulativeLayoutShift", metric: "cumulative-layout-shift", unit: "score" }, { key: "speedIndex", metric: "speed-index", unit: "ms" }, ] as const; // Default values export const DEFAULTS = { LCP_THRESHOLD: 2.5 as number, MIN_UNUSED_JS_BYTES: 2048 as number, MIN_RESOURCE_SIZE_KB: 0 as number, };