[Lighthouse] Add agentic browsing category

The category checkbox is disabled by default. The custom agentic browsing config is included in front_end/panels/lighthouse/LighthouseProtocolService.ts for now, but will be removed once the agentic browsing category is in the default config.

Bug:  501056067
Change-Id: I199a87fd59cf6cdaaacd5205259aa29d4b6ff99b
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7806870
Reviewed-by: Paul Irish <paulirish@chromium.org>
Commit-Queue: Lusa Zhan <lusazhan@chromium.org>

Author: Lusa Zhan

front_end/core/host/UserMetrics.ts

@@ -1146,7 +1146,8 @@ export const enum LighthouseCategoryUsed {
   SEO = 3,
   PWA = 4,
   PUB_ADS = 5,
-  MAX_VALUE = 6,
+  AGENTIC_BROWSING = 6,
+  MAX_VALUE = 7,
 }
 
 export const enum SwatchType {

front_end/models/lighthouse/RunTypes.ts

@@ -5,7 +5,7 @@ import type * as Common from '../../core/common/common.js';
 import type * as Host from '../../core/host/host.js';
 import type * as Platform from '../../core/platform/platform.js';
 
-export type CategoryId = 'performance'|'accessibility'|'best-practices'|'seo';
+export type CategoryId = 'performance'|'accessibility'|'best-practices'|'seo'|'agentic-browsing';
 export type RunMode = 'navigation'|'timespan'|'snapshot';
 
 export interface Preset {

front_end/panels/lighthouse/LighthouseController.ts

@@ -84,6 +84,15 @@ const UIStrings = {
    * @description Tooltip text of checkbox to include running the Search Engine Optimization audits in Lighthouse
    */
   isThisPageOptimizedForSearch: 'Is this page optimized for search engine results ranking',
+  /**
+   * @description Text of checkbox to include running the Agentic Browsing audits in Lighthouse
+   */
+  agenticBrowsing: 'Agentic browsing',
+  /**
+   * @description Tooltip text of checkbox to include running the Agentic Browsing audits in Lighthouse
+   */
+  agenticBrowsingDescription:
+      'These checks ensure high-quality, browsable websites for AI agents and validate the correctness of WebMCP integrations. This category is still under development and subject to change.',
   /**
    * @description ARIA label for a radio button input to emulate mobile device behavior when running audits in Lighthouse.
    */
@@ -749,6 +758,15 @@ export function getPresets(): LighthouseModel.RunTypes.Preset[] {
         supportedModes: ['navigation', 'snapshot'],
         userMetric: Host.UserMetrics.LighthouseCategoryUsed.SEO,
       },
+      {
+        setting: Common.Settings.Settings.instance().createSetting(
+            'lighthouse.cat-agentic-browsing', false, Common.Settings.SettingStorageType.SYNCED),
+        configID: 'agentic-browsing',
+        title: i18nLazyString(UIStrings.agenticBrowsing),
+        description: i18nLazyString(UIStrings.agenticBrowsingDescription),
+        supportedModes: ['navigation', 'snapshot'],
+        userMetric: Host.UserMetrics.LighthouseCategoryUsed.AGENTIC_BROWSING,
+      },
     ];
   }
   return presets;

front_end/ui/visual_logging/KnownContextValues.ts

@@ -2504,6 +2504,7 @@ export const knownContextValues = new Set([
   'lighthouse.audit.work-during-interaction',
   'lighthouse.cancel',
   'lighthouse.cat-a11y',
+  'lighthouse.cat-agentic-browsing',
   'lighthouse.cat-best-practices',
   'lighthouse.cat-perf',
   'lighthouse.cat-seo',