chromium-arm64

Instructions

Implementation Reference

• index.js:876-904 (handler)

  The handler function that executes the performance audit tool. It ensures the Chromium browser is running, executes JavaScript via CDP to gather performance metrics like DOM content loaded time, load complete time, first paint, resource count, and memory usage, parses the results, and returns them formatted as text.
  async runPerformanceAudit() { await this.ensureChromium(); const result = await this.sendCDPCommand('Runtime.evaluate', { expression: ` const perfData = performance.getEntriesByType('navigation')[0]; const timing = performance.timing; JSON.stringify({ domContentLoaded: perfData ? Math.round(perfData.domContentLoadedEventEnd - perfData.domContentLoadedEventStart) : 0, loadComplete: perfData ? Math.round(perfData.loadEventEnd - perfData.loadEventStart) : 0, firstPaint: timing ? timing.loadEventEnd - timing.navigationStart : 0, resourceCount: performance.getEntriesByType('resource').length, memoryUsage: performance.memory ? { used: Math.round(performance.memory.usedJSHeapSize / 1024 / 1024), total: Math.round(performance.memory.totalJSHeapSize / 1024 / 1024), limit: Math.round(performance.memory.jsHeapSizeLimit / 1024 / 1024) } : 'Not available' }); `, returnByValue: true }); const performanceMetrics = JSON.parse(result.result?.value || '{}'); return { content: [{ type: 'text', text: `Performance Audit Results:\\n${JSON.stringify(performanceMetrics, null, 2)}` }], }; }
• index.js:381-382 (registration)

  Registration of the tool handler in the switch statement that dispatches tool calls to the appropriate method.
  case 'run_performance_audit': return await this.runPerformanceAudit();
• index.js:287-294 (schema)

  Tool schema definition including name, description, and empty input schema (no parameters required). This is part of the tools list returned by ListToolsRequestSchema.
  { name: 'run_performance_audit', description: 'Run a performance audit on the current page', inputSchema: { type: 'object', properties: {}, }, },
• index.js:104-343 (registration)

  The tool is registered in the ListToolsRequestSchema handler by including it in the tools array with its schema.
  tools: [ { name: 'navigate', description: 'Navigate to a URL', inputSchema: { type: 'object', properties: { url: { type: 'string', description: 'The URL to navigate to', }, }, required: ['url'], }, }, { name: 'screenshot', description: 'Take a screenshot of the current page', inputSchema: { type: 'object', properties: { name: { type: 'string', description: 'Name for the screenshot file', default: 'screenshot.png', }, fullPage: { type: 'boolean', description: 'Capture full page', default: false, }, }, }, }, { name: 'click', description: 'Click an element on the page', inputSchema: { type: 'object', properties: { selector: { type: 'string', description: 'CSS selector for the element to click', }, }, required: ['selector'], }, }, { name: 'fill', description: 'Fill an input field', inputSchema: { type: 'object', properties: { selector: { type: 'string', description: 'CSS selector for the input field', }, value: { type: 'string', description: 'Value to fill', }, }, required: ['selector', 'value'], }, }, { name: 'evaluate', description: 'Execute JavaScript in the browser', inputSchema: { type: 'object', properties: { script: { type: 'string', description: 'JavaScript code to execute', }, }, required: ['script'], }, }, { name: 'get_content', description: 'Get page content (HTML or text)', inputSchema: { type: 'object', properties: { type: { type: 'string', enum: ['html', 'text'], description: 'Type of content to get', default: 'text', }, }, }, }, { name: 'hover', description: 'Hover over an element on the page', inputSchema: { type: 'object', properties: { selector: { type: 'string', description: 'CSS selector for the element to hover', }, }, required: ['selector'], }, }, { name: 'select', description: 'Select an option from a dropdown', inputSchema: { type: 'object', properties: { selector: { type: 'string', description: 'CSS selector for the select element', }, value: { type: 'string', description: 'Value to select', }, }, required: ['selector', 'value'], }, }, { name: 'get_console_logs', description: 'Get browser console logs', inputSchema: { type: 'object', properties: {}, }, }, { name: 'get_console_errors', description: 'Get browser console errors', inputSchema: { type: 'object', properties: {}, }, }, { name: 'get_network_logs', description: 'Get network activity logs', inputSchema: { type: 'object', properties: {}, }, }, { name: 'get_network_errors', description: 'Get network error logs', inputSchema: { type: 'object', properties: {}, }, }, { name: 'wipe_logs', description: 'Clear all stored logs from memory', inputSchema: { type: 'object', properties: {}, }, }, { name: 'get_selected_element', description: 'Get information about the currently selected element', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_accessibility_audit', description: 'Run an accessibility audit on the current page', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_performance_audit', description: 'Run a performance audit on the current page', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_seo_audit', description: 'Run an SEO audit on the current page', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_best_practices_audit', description: 'Run a best practices audit on the current page', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_nextjs_audit', description: 'Run a Next.js specific audit on the current page', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_debugger_mode', description: 'Run debugger mode to debug issues in the application', inputSchema: { type: 'object', properties: {}, }, }, { name: 'run_audit_mode', description: 'Run comprehensive audit mode for optimization', inputSchema: { type: 'object', properties: {}, }, }, { name: 'close_browser', description: 'Close the browser instance', inputSchema: { type: 'object', properties: {}, }, }, ],