[Discover sessions as Code] Default-on discover.embeddableTransforms

src/platform/plugins/shared/discover/common/constants.ts

@@ -55,3 +55,6 @@ export const METRICS_EXPERIENCE_PRODUCT_FEATURE_ID = 'discover:metrics-experienc
  * When disabled, panel state is stored and loaded as-is (pre-transform behavior).
  */
 export const EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY = 'discover.embeddableTransforms';
+
+/** Default when the flag is unset (e.g. fresh install). Explicit `false` still disables. */
+export const EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT = true;

src/platform/plugins/shared/discover/common/index.ts

@@ -10,7 +10,11 @@
 export const PLUGIN_ID = 'discover';
 export const APP_ICON = 'discoverApp';
 
-export { APP_STATE_URL_KEY, EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY } from './constants';
+export {
+  APP_STATE_URL_KEY,
+  EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT,
+  EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY,
+} from './constants';
 export { DISCOVER_APP_LOCATOR } from './app_locator';
 export type {
   DiscoverAppLocator,

src/platform/plugins/shared/discover/public/__mocks__/services.ts

@@ -330,7 +330,7 @@ export function createDiscoverServicesMock(): DiscoverServices {
     discoverFeatureFlags: {
       getCascadeLayoutEnabled: jest.fn(() => false),
       getIsEsqlDefault: jest.fn(() => false),
-      getEmbeddableTransformsEnabled: jest.fn(() => false),
+      getEmbeddableTransformsEnabled: jest.fn(() => true),
     },
     embeddableEditor: {
       isByValueEditor: jest.fn(() => false),

src/platform/plugins/shared/discover/public/build_services.ts

@@ -73,6 +73,7 @@ import type { ProfilesManager } from './context_awareness';
 import type { DiscoverEBTManager } from './ebt_manager';
 import {
   CASCADE_LAYOUT_ENABLED_FEATURE_FLAG_KEY,
+  EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT,
   EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY,
   IS_ESQL_DEFAULT_FEATURE_FLAG_KEY,
 } from './constants';
@@ -212,7 +213,10 @@ export const buildServices = ({
       getIsEsqlDefault: () =>
         core.featureFlags.getBooleanValue(IS_ESQL_DEFAULT_FEATURE_FLAG_KEY, false),
       getEmbeddableTransformsEnabled: () =>
-        core.featureFlags.getBooleanValue(EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY, false),
+        core.featureFlags.getBooleanValue(
+          EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY,
+          EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT
+        ),
     },
     docLinks: core.docLinks,
     embeddable: plugins.embeddable,

src/platform/plugins/shared/discover/public/constants.ts

@@ -13,6 +13,9 @@ export const SEARCH_SESSION_ID_QUERY_PARAM = 'searchSessionId';
 
 export const CASCADE_LAYOUT_ENABLED_FEATURE_FLAG_KEY = 'discover.cascadeLayoutEnabled';
 
-export { EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY } from '../common';
+export {
+  EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT,
+  EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY,
+} from '../common';
 
 export { IS_ESQL_DEFAULT_FEATURE_FLAG_KEY } from '@kbn/discover-utils';

src/platform/plugins/shared/discover/server/plugin.ts

@@ -27,6 +27,7 @@ import { getUiSettings } from './ui_settings';
 import type { ConfigSchema } from './config';
 import { appLocatorGetLocationCommon } from '../common/app_locator_get_location';
 import {
+  EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT,
   EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_KEY,
   METRICS_EXPERIENCE_PRODUCT_FEATURE_ID,
   TRACES_PRODUCT_FEATURE_ID,
@@ -38,7 +39,7 @@ export class DiscoverServerPlugin
 {
   private readonly config: ConfigSchema;
   private subscriptions: Subscription[] = [];
-  private embeddableTransformsEnabled = false;
+  private embeddableTransformsEnabled = EMBEDDABLE_TRANSFORMS_FEATURE_FLAG_DEFAULT;
 
   constructor(initializerContext: PluginInitializerContext<ConfigSchema>) {
     this.config = initializerContext.config.get();