diff --git a/packages/frontend-app-api/src/apis/implementations/ComponentsApi/DefaultComponentsApi.test.tsx b/packages/frontend-app-api/src/apis/implementations/ComponentsApi/DefaultComponentsApi.test.tsx
index 7d62103727..e2c7581e63 100644
--- a/packages/frontend-app-api/src/apis/implementations/ComponentsApi/DefaultComponentsApi.test.tsx
+++ b/packages/frontend-app-api/src/apis/implementations/ComponentsApi/DefaultComponentsApi.test.tsx
@@ -40,14 +40,8 @@ const baseOverrides = createExtensionOverrides({
       namespace: 'app',
       name: 'root',
       attachTo: { id: 'app', input: 'root' },
-      output: {
-        element: coreExtensionData.reactElement,
-      },
-      factory() {
-        return {
-          element: <div>root</div>,
-        };
-      },
+      output: [coreExtensionData.reactElement],
+      factory: () => [coreExtensionData.reactElement(<div>root</div>)],
     }),
   ],
 });
diff --git a/packages/frontend-app-api/src/extensions/App.tsx b/packages/frontend-app-api/src/extensions/App.tsx
index 7794aceb79..ba6c5f65f1 100644
--- a/packages/frontend-app-api/src/extensions/App.tsx
+++ b/packages/frontend-app-api/src/extensions/App.tsx
@@ -18,51 +18,38 @@ import React from 'react';
 import {
   ExtensionBoundary,
   coreExtensionData,
-  createApiExtension,
   createComponentExtension,
   createExtension,
   createExtensionInput,
-  createThemeExtension,
-  createTranslationExtension,
   IconBundleBlueprint,
+  ThemeBlueprint,
+  ApiBlueprint,
+  TranslationBlueprint,
 } from '@backstage/frontend-plugin-api';
 
 export const App = createExtension({
   namespace: 'app',
   attachTo: { id: 'root', input: 'default' }, // ignored
   inputs: {
-    apis: createExtensionInput({
-      api: createApiExtension.factoryDataRef,
+    apis: createExtensionInput([ApiBlueprint.dataRefs.factory]),
+    themes: createExtensionInput([ThemeBlueprint.dataRefs.theme]),
+    components: createExtensionInput([
+      createComponentExtension.componentDataRef,
+    ]),
+    translations: createExtensionInput([
+      TranslationBlueprint.dataRefs.translation,
+    ]),
+    icons: createExtensionInput([IconBundleBlueprint.dataRefs.icons]),
+    root: createExtensionInput([coreExtensionData.reactElement], {
+      singleton: true,
     }),
-    themes: createExtensionInput({
-      theme: createThemeExtension.themeDataRef,
-    }),
-    components: createExtensionInput({
-      component: createComponentExtension.componentDataRef,
-    }),
-    translations: createExtensionInput({
-      translation: createTranslationExtension.translationDataRef,
-    }),
-    icons: createExtensionInput({
-      icon: IconBundleBlueprint.dataRefs.icons,
-    }),
-    root: createExtensionInput(
-      {
-        element: coreExtensionData.reactElement,
-      },
-      { singleton: true },
+  },
+  output: [coreExtensionData.reactElement],
+  factory: ({ node, inputs }) => [
+    coreExtensionData.reactElement(
+      <ExtensionBoundary node={node}>
+        {inputs.root.get(coreExtensionData.reactElement)}
+      </ExtensionBoundary>,
     ),
-  },
-  output: {
-    root: coreExtensionData.reactElement,
-  },
-  factory({ node, inputs }) {
-    return {
-      root: (
-        <ExtensionBoundary node={node}>
-          {inputs.root.output.element}
-        </ExtensionBoundary>
-      ),
-    };
-  },
+  ],
 });
diff --git a/packages/frontend-app-api/src/extensions/AppLayout.tsx b/packages/frontend-app-api/src/extensions/AppLayout.tsx
index 7be0029c25..9fadba8a93 100644
--- a/packages/frontend-app-api/src/extensions/AppLayout.tsx
+++ b/packages/frontend-app-api/src/extensions/AppLayout.tsx
@@ -27,30 +27,20 @@ export const AppLayout = createExtension({
   name: 'layout',
   attachTo: { id: 'app/root', input: 'children' },
   inputs: {
-    nav: createExtensionInput(
-      {
-        element: coreExtensionData.reactElement,
-      },
-      { singleton: true },
+    nav: createExtensionInput([coreExtensionData.reactElement], {
+      singleton: true,
+    }),
+    content: createExtensionInput([coreExtensionData.reactElement], {
+      singleton: true,
+    }),
+  },
+  output: [coreExtensionData.reactElement],
+  factory: ({ inputs }) => [
+    coreExtensionData.reactElement(
+      <SidebarPage>
+        {inputs.nav.get(coreExtensionData.reactElement)}
+        {inputs.content.get(coreExtensionData.reactElement)}
+      </SidebarPage>,
     ),
-    content: createExtensionInput(
-      {
-        element: coreExtensionData.reactElement,
-      },
-      { singleton: true },
-    ),
-  },
-  output: {
-    element: coreExtensionData.reactElement,
-  },
-  factory({ inputs }) {
-    return {
-      element: (
-        <SidebarPage>
-          {inputs.nav.output.element}
-          {inputs.content.output.element}
-        </SidebarPage>
-      ),
-    };
-  },
+  ],
 });
diff --git a/packages/frontend-app-api/src/extensions/AppNav.tsx b/packages/frontend-app-api/src/extensions/AppNav.tsx
index ffef1c7c61..49c95e84f2 100644
--- a/packages/frontend-app-api/src/extensions/AppNav.tsx
+++ b/packages/frontend-app-api/src/extensions/AppNav.tsx
@@ -86,33 +86,27 @@ export const AppNav = createExtension({
   name: 'nav',
   attachTo: { id: 'app/layout', input: 'nav' },
   inputs: {
-    items: createExtensionInput({
-      target: createNavItemExtension.targetDataRef,
+    items: createExtensionInput([createNavItemExtension.targetDataRef]),
+    logos: createExtensionInput([createNavLogoExtension.logoElementsDataRef], {
+      singleton: true,
+      optional: true,
     }),
-    logos: createExtensionInput(
-      {
-        elements: createNavLogoExtension.logoElementsDataRef,
-      },
-      {
-        singleton: true,
-        optional: true,
-      },
+  },
+  output: [coreExtensionData.reactElement],
+  factory: ({ inputs }) => [
+    coreExtensionData.reactElement(
+      <Sidebar>
+        <SidebarLogo
+          {...inputs.logos?.get(createNavLogoExtension.logoElementsDataRef)}
+        />
+        <SidebarDivider />
+        {inputs.items.map((item, index) => (
+          <SidebarNavItem
+            {...item.get(createNavItemExtension.targetDataRef)}
+            key={index}
+          />
+        ))}
+      </Sidebar>,
     ),
-  },
-  output: {
-    element: coreExtensionData.reactElement,
-  },
-  factory({ inputs }) {
-    return {
-      element: (
-        <Sidebar>
-          <SidebarLogo {...inputs.logos?.output.elements} />
-          <SidebarDivider />
-          {inputs.items.map((item, index) => (
-            <SidebarNavItem {...item.output.target} key={index} />
-          ))}
-        </Sidebar>
-      ),
-    };
-  },
+  ],
 });
diff --git a/packages/frontend-app-api/src/extensions/AppRoot.tsx b/packages/frontend-app-api/src/extensions/AppRoot.tsx
index f3a962dd10..a158386d04 100644
--- a/packages/frontend-app-api/src/extensions/AppRoot.tsx
+++ b/packages/frontend-app-api/src/extensions/AppRoot.tsx
@@ -23,12 +23,12 @@ import React, {
   useState,
 } from 'react';
 import {
+  AppRootWrapperBlueprint,
+  RouterBlueprint,
+  SignInPageBlueprint,
   coreExtensionData,
-  createAppRootWrapperExtension,
   createExtension,
   createExtensionInput,
-  createRouterExtension,
-  createSignInPageExtension,
 } from '@backstage/frontend-plugin-api';
 import {
   IdentityApi,
@@ -48,52 +48,54 @@ export const AppRoot = createExtension({
   name: 'root',
   attachTo: { id: 'app', input: 'root' },
   inputs: {
-    router: createExtensionInput(
-      { component: createRouterExtension.componentDataRef },
-      { singleton: true, optional: true },
-    ),
-    signInPage: createExtensionInput(
-      { component: createSignInPageExtension.componentDataRef },
-      { singleton: true, optional: true },
-    ),
-    children: createExtensionInput(
-      { element: coreExtensionData.reactElement },
-      { singleton: true },
-    ),
-    elements: createExtensionInput({
-      element: coreExtensionData.reactElement,
+    router: createExtensionInput([RouterBlueprint.dataRefs.component], {
+      singleton: true,
+      optional: true,
     }),
-    wrappers: createExtensionInput({
-      component: createAppRootWrapperExtension.componentDataRef,
+    signInPage: createExtensionInput([SignInPageBlueprint.dataRefs.component], {
+      singleton: true,
+      optional: true,
     }),
+    children: createExtensionInput([coreExtensionData.reactElement], {
+      singleton: true,
+    }),
+    elements: createExtensionInput([coreExtensionData.reactElement]),
+    wrappers: createExtensionInput([
+      AppRootWrapperBlueprint.dataRefs.component,
+    ]),
   },
-  output: {
-    element: coreExtensionData.reactElement,
-  },
+  output: [coreExtensionData.reactElement],
   factory({ inputs }) {
     let content: React.ReactNode = (
       <>
         {inputs.elements.map(el => (
-          <Fragment key={el.node.spec.id}>{el.output.element}</Fragment>
+          <Fragment key={el.node.spec.id}>
+            {el.get(coreExtensionData.reactElement)}
+          </Fragment>
         ))}
-        {inputs.children.output.element}
+        {inputs.children.get(coreExtensionData.reactElement)}
       </>
     );
 
     for (const wrapper of inputs.wrappers) {
-      content = <wrapper.output.component>{content}</wrapper.output.component>;
+      const Component = wrapper.get(AppRootWrapperBlueprint.dataRefs.component);
+      content = <Component>{content}</Component>;
     }
 
-    return {
-      element: (
+    return [
+      coreExtensionData.reactElement(
         <AppRouter
-          SignInPageComponent={inputs.signInPage?.output.component}
-          RouterComponent={inputs.router?.output.component}
+          SignInPageComponent={inputs.signInPage?.get(
+            SignInPageBlueprint.dataRefs.component,
+          )}
+          RouterComponent={inputs.router?.get(
+            RouterBlueprint.dataRefs.component,
+          )}
         >
           {content}
-        </AppRouter>
+        </AppRouter>,
       ),
-    };
+    ];
   },
 });
 
diff --git a/packages/frontend-app-api/src/extensions/AppRoutes.tsx b/packages/frontend-app-api/src/extensions/AppRoutes.tsx
index 38a9291755..6ef7e2a271 100644
--- a/packages/frontend-app-api/src/extensions/AppRoutes.tsx
+++ b/packages/frontend-app-api/src/extensions/AppRoutes.tsx
@@ -29,15 +29,13 @@ export const AppRoutes = createExtension({
   name: 'routes',
   attachTo: { id: 'app/layout', input: 'content' },
   inputs: {
-    routes: createExtensionInput({
-      path: coreExtensionData.routePath,
-      ref: coreExtensionData.routeRef.optional(),
-      element: coreExtensionData.reactElement,
-    }),
-  },
-  output: {
-    element: coreExtensionData.reactElement,
+    routes: createExtensionInput([
+      coreExtensionData.routePath,
+      coreExtensionData.routeRef.optional(),
+      coreExtensionData.reactElement,
+    ]),
   },
+  output: [coreExtensionData.reactElement],
   factory({ inputs }) {
     const Routes = () => {
       const NotFoundErrorPage = useComponentRef(
@@ -46,8 +44,8 @@ export const AppRoutes = createExtension({
 
       const element = useRoutes([
         ...inputs.routes.map(route => ({
-          path: `${route.output.path}/*`,
-          element: route.output.element,
+          path: `${route.get(coreExtensionData.routePath)}/*`,
+          element: route.get(coreExtensionData.reactElement),
         })),
         {
           path: '*',
@@ -58,8 +56,6 @@ export const AppRoutes = createExtension({
       return element;
     };
 
-    return {
-      element: <Routes />,
-    };
+    return [coreExtensionData.reactElement(<Routes />)];
   },
 });
diff --git a/packages/frontend-app-api/src/extensions/elements.tsx b/packages/frontend-app-api/src/extensions/elements.tsx
index 0a764583bb..1ab7f97ba2 100644
--- a/packages/frontend-app-api/src/extensions/elements.tsx
+++ b/packages/frontend-app-api/src/extensions/elements.tsx
@@ -15,31 +15,36 @@
  */
 
 import { AlertDisplay, OAuthRequestDialog } from '@backstage/core-components';
-import {
-  createAppRootElementExtension,
-  createSchemaFromZod,
-} from '@backstage/frontend-plugin-api';
+import { AppRootElementBlueprint } from '@backstage/frontend-plugin-api';
 import React from 'react';
 
-export const oauthRequestDialogAppRootElement = createAppRootElementExtension({
+export const oauthRequestDialogAppRootElement = AppRootElementBlueprint.make({
   namespace: 'app',
   name: 'oauth-request-dialog',
-  element: <OAuthRequestDialog />,
+  params: {
+    element: <OAuthRequestDialog />,
+  },
 });
 
-export const alertDisplayAppRootElement = createAppRootElementExtension({
-  namespace: 'app',
-  name: 'alert-display',
-  configSchema: createSchemaFromZod(z =>
-    z.object({
-      transientTimeoutMs: z.number().default(5000),
-      anchorOrigin: z
-        .object({
-          vertical: z.enum(['top', 'bottom']).default('top'),
-          horizontal: z.enum(['left', 'center', 'right']).default('center'),
-        })
-        .default({}),
-    }),
-  ),
-  element: ({ config }) => <AlertDisplay {...config} />,
-});
+export const alertDisplayAppRootElement =
+  AppRootElementBlueprint.makeWithOverrides({
+    namespace: 'app',
+    name: 'alert-display',
+    config: {
+      schema: {
+        transientTimeoutMs: z => z.number().default(5000),
+        anchorOrigin: z =>
+          z
+            .object({
+              vertical: z.enum(['top', 'bottom']).default('top'),
+              horizontal: z.enum(['left', 'center', 'right']).default('center'),
+            })
+            .default({}),
+      },
+    },
+    factory: (originalFactory, { config }) => {
+      return originalFactory({
+        element: () => <AlertDisplay {...config} />,
+      });
+    },
+  });
diff --git a/packages/frontend-app-api/src/extensions/themes.tsx b/packages/frontend-app-api/src/extensions/themes.tsx
index ea11b6a638..a4fd0b253e 100644
--- a/packages/frontend-app-api/src/extensions/themes.tsx
+++ b/packages/frontend-app-api/src/extensions/themes.tsx
@@ -21,24 +21,34 @@ import {
 } from '@backstage/theme';
 import DarkIcon from '@material-ui/icons/Brightness2';
 import LightIcon from '@material-ui/icons/WbSunny';
-import { createThemeExtension } from '@backstage/frontend-plugin-api';
+import { ThemeBlueprint } from '@backstage/frontend-plugin-api';
 
-export const LightTheme = createThemeExtension({
-  id: 'light',
-  title: 'Light Theme',
-  variant: 'light',
-  icon: <LightIcon />,
-  Provider: ({ children }) => (
-    <UnifiedThemeProvider theme={builtinThemes.light} children={children} />
-  ),
+export const LightTheme = ThemeBlueprint.make({
+  name: 'light',
+  params: {
+    theme: {
+      id: 'light',
+      title: 'Light Theme',
+      variant: 'light',
+      icon: <LightIcon />,
+      Provider: ({ children }) => (
+        <UnifiedThemeProvider theme={builtinThemes.light} children={children} />
+      ),
+    },
+  },
 });
 
-export const DarkTheme = createThemeExtension({
-  id: 'dark',
-  title: 'Dark Theme',
-  variant: 'dark',
-  icon: <DarkIcon />,
-  Provider: ({ children }) => (
-    <UnifiedThemeProvider theme={builtinThemes.dark} children={children} />
-  ),
+export const DarkTheme = ThemeBlueprint.make({
+  name: 'dark',
+  params: {
+    theme: {
+      id: 'dark',
+      title: 'Dark Theme',
+      variant: 'dark',
+      icon: <DarkIcon />,
+      Provider: ({ children }) => (
+        <UnifiedThemeProvider theme={builtinThemes.dark} children={children} />
+      ),
+    },
+  },
 });
diff --git a/packages/frontend-app-api/src/routing/extractRouteInfoFromAppNode.test.ts b/packages/frontend-app-api/src/routing/extractRouteInfoFromAppNode.test.ts
index c22cb6ff1d..8a54f3e73e 100644
--- a/packages/frontend-app-api/src/routing/extractRouteInfoFromAppNode.test.ts
+++ b/packages/frontend-app-api/src/routing/extractRouteInfoFromAppNode.test.ts
@@ -50,22 +50,23 @@ function createTestExtension(options: {
     attachTo: options.parent
       ? { id: `test/${options.parent}`, input: 'children' }
       : { id: 'app/routes', input: 'routes' },
-    output: {
-      element: coreExtensionData.reactElement,
-      path: coreExtensionData.routePath.optional(),
-      routeRef: coreExtensionData.routeRef.optional(),
-    },
+    output: [
+      coreExtensionData.reactElement,
+      coreExtensionData.routePath.optional(),
+      coreExtensionData.routeRef.optional(),
+    ],
     inputs: {
-      children: createExtensionInput({
-        element: coreExtensionData.reactElement,
-      }),
+      children: createExtensionInput([coreExtensionData.reactElement]),
     },
-    factory() {
-      return {
-        path: options.path,
-        routeRef: options.routeRef,
-        element: React.createElement('div'),
-      };
+    *factory() {
+      if (options.path) {
+        yield coreExtensionData.routePath(options.path);
+      }
+      if (options.routeRef) {
+        yield coreExtensionData.routeRef(options.routeRef);
+      }
+
+      yield coreExtensionData.reactElement(React.createElement('div'));
     },
   });
 }
diff --git a/packages/frontend-app-api/src/tree/createAppTree.test.ts b/packages/frontend-app-api/src/tree/createAppTree.test.ts
index f24f199d5d..f5df5270cd 100644
--- a/packages/frontend-app-api/src/tree/createAppTree.test.ts
+++ b/packages/frontend-app-api/src/tree/createAppTree.test.ts
@@ -25,8 +25,8 @@ import { createAppTree } from './createAppTree';
 const extBase = {
   id: 'test',
   attachTo: { id: 'app', input: 'root' },
-  output: {},
-  factory: () => ({}),
+  output: [],
+  factory: () => [],
 };
 
 describe('createAppTree', () => {
@@ -60,8 +60,8 @@ describe('createAppTree', () => {
             name: 'app',
             attachTo: { id: 'app/routes', input: 'route' },
             inputs: {},
-            output: {},
-            factory: () => ({}),
+            output: [],
+            factory: () => [],
           }),
         ],
       }),
diff --git a/packages/frontend-app-api/src/tree/resolveAppTree.test.ts b/packages/frontend-app-api/src/tree/resolveAppTree.test.ts
index d9b65555fe..740f05d5f7 100644
--- a/packages/frontend-app-api/src/tree/resolveAppTree.test.ts
+++ b/packages/frontend-app-api/src/tree/resolveAppTree.test.ts
@@ -23,8 +23,8 @@ const extension = resolveExtensionDefinition(
   createExtension({
     name: 'test',
     attachTo: { id: 'nonexistent', input: 'nonexistent' },
-    output: {},
-    factory: () => ({}),
+    output: [],
+    factory: () => [],
   }),
 ) as Extension<unknown, unknown>;
 
diff --git a/packages/frontend-app-api/src/wiring/createApp.test.tsx b/packages/frontend-app-api/src/wiring/createApp.test.tsx
index ead9422a13..c79d8eed76 100644
--- a/packages/frontend-app-api/src/wiring/createApp.test.tsx
+++ b/packages/frontend-app-api/src/wiring/createApp.test.tsx
@@ -20,9 +20,9 @@ import {
   coreExtensionData,
   createExtension,
   createExtensionOverrides,
-  createPageExtension,
+  PageBlueprint,
   createFrontendPlugin,
-  createThemeExtension,
+  ThemeBlueprint,
 } from '@backstage/frontend-plugin-api';
 import { screen, waitFor } from '@testing-library/react';
 import { CreateAppFeatureLoader, createApp } from './createApp';
@@ -47,11 +47,16 @@ describe('createApp', () => {
         createFrontendPlugin({
           id: 'test',
           extensions: [
-            createThemeExtension({
-              id: 'derp',
-              title: 'Derp',
-              variant: 'dark',
-              Provider: () => <div>Derp</div>,
+            ThemeBlueprint.make({
+              name: 'derp',
+              params: {
+                theme: {
+                  id: 'derp',
+                  title: 'Derp',
+                  variant: 'dark',
+                  Provider: () => <div>Derp</div>,
+                },
+              },
             }),
           ],
         }),
@@ -71,18 +76,22 @@ describe('createApp', () => {
         createFrontendPlugin({
           id: duplicatedFeatureId,
           extensions: [
-            createPageExtension({
-              defaultPath: '/',
-              loader: async () => <div>First Page</div>,
+            PageBlueprint.make({
+              params: {
+                defaultPath: '/',
+                loader: async () => <div>First Page</div>,
+              },
             }),
           ],
         }),
         createFrontendPlugin({
           id: duplicatedFeatureId,
           extensions: [
-            createPageExtension({
-              defaultPath: '/',
-              loader: async () => <div>Last Page</div>,
+            PageBlueprint.make({
+              params: {
+                defaultPath: '/',
+                loader: async () => <div>Last Page</div>,
+              },
             }),
           ],
         }),
@@ -110,9 +119,11 @@ describe('createApp', () => {
             createFrontendPlugin({
               id: 'test',
               extensions: [
-                createPageExtension({
-                  defaultPath: '/',
-                  loader: async () => <div>{config.getString('key')}</div>,
+                PageBlueprint.make({
+                  params: {
+                    defaultPath: '/',
+                    loader: async () => <div>{config.getString('key')}</div>,
+                  },
                 }),
               ],
             }),
@@ -170,7 +181,7 @@ describe('createApp', () => {
             createExtension({
               name: 'first',
               attachTo: { id: 'app', input: 'root' },
-              output: { element: coreExtensionData.reactElement },
+              output: [coreExtensionData.reactElement],
               factory() {
                 const Component = () => {
                   const flagsApi = useApi(featureFlagsApiRef);
@@ -184,7 +195,7 @@ describe('createApp', () => {
                     </div>
                   );
                 };
-                return { element: <Component /> };
+                return [coreExtensionData.reactElement(<Component />)];
               },
             }),
           ],
@@ -197,8 +208,8 @@ describe('createApp', () => {
               name: 'root',
               attachTo: { id: 'app', input: 'root' },
               disabled: true,
-              output: {},
-              factory: () => ({}),
+              output: [],
+              factory: () => [],
             }),
           ],
         }),
@@ -221,14 +232,16 @@ describe('createApp', () => {
         createFrontendPlugin({
           id: 'my-plugin',
           extensions: [
-            createPageExtension({
-              defaultPath: '/',
-              loader: async () => {
-                const Component = () => {
-                  appTreeApi = useApi(appTreeApiRef);
-                  return <div>My Plugin Page</div>;
-                };
-                return <Component />;
+            PageBlueprint.make({
+              params: {
+                defaultPath: '/',
+                loader: async () => {
+                  const Component = () => {
+                    appTreeApi = useApi(appTreeApiRef);
+                    return <div>My Plugin Page</div>;
+                  };
+                  return <Component />;
+                },
               },
             }),
           ],
@@ -250,7 +263,7 @@ describe('createApp', () => {
                 content [
                   <app/routes out=[core.reactElement]>
                     routes [
-                      <page:my-plugin out=[core.routing.path, core.routing.ref, core.reactElement] />
+                      <page:my-plugin out=[core.routing.path, core.reactElement] />
                     ]
                   </app/routes>
                 ]
diff --git a/packages/frontend-app-api/src/wiring/createApp.tsx b/packages/frontend-app-api/src/wiring/createApp.tsx
index 6f23f4cf2c..ca42dce3e4 100644
--- a/packages/frontend-app-api/src/wiring/createApp.tsx
+++ b/packages/frontend-app-api/src/wiring/createApp.tsx
@@ -17,18 +17,18 @@
 import React, { JSX, ReactNode } from 'react';
 import { ConfigReader } from '@backstage/config';
 import {
+  ApiBlueprint,
   AppTree,
   appTreeApiRef,
   componentsApiRef,
   coreExtensionData,
-  createApiExtension,
-  createThemeExtension,
-  createTranslationExtension,
   FrontendFeature,
   IconBundleBlueprint,
   iconsApiRef,
   RouteResolutionApi,
   routeResolutionApiRef,
+  ThemeBlueprint,
+  TranslationBlueprint,
 } from '@backstage/frontend-plugin-api';
 import { App } from '../extensions/App';
 import { AppRoutes } from '../extensions/AppRoutes';
@@ -110,7 +110,9 @@ import { stringifyError } from '@backstage/errors';
 import { icons as defaultIcons } from '../../../app-defaults/src/defaults';
 import { getBasePath } from '../routing/getBasePath';
 
-const DefaultApis = defaultApis.map(factory => createApiExtension({ factory }));
+const DefaultApis = defaultApis.map(factory =>
+  ApiBlueprint.make({ namespace: factory.api.id, params: { factory } }),
+);
 
 export const builtinExtensions = [
   App,
@@ -357,23 +359,21 @@ function createApiHolder(
   const pluginApis =
     tree.root.edges.attachments
       .get('apis')
-      ?.map(e => e.instance?.getData(createApiExtension.factoryDataRef))
+      ?.map(e => e.instance?.getData(ApiBlueprint.dataRefs.factory))
       .filter((x): x is AnyApiFactory => !!x) ?? [];
 
   const themeExtensions =
     tree.root.edges.attachments
       .get('themes')
-      ?.map(e => e.instance?.getData(createThemeExtension.themeDataRef))
+      ?.map(e => e.instance?.getData(ThemeBlueprint.dataRefs.theme))
       .filter((x): x is AppTheme => !!x) ?? [];
 
   const translationResources =
     tree.root.edges.attachments
       .get('translations')
-      ?.map(e =>
-        e.instance?.getData(createTranslationExtension.translationDataRef),
-      )
+      ?.map(e => e.instance?.getData(TranslationBlueprint.dataRefs.translation))
       .filter(
-        (x): x is typeof createTranslationExtension.translationDataRef.T => !!x,
+        (x): x is typeof TranslationBlueprint.dataRefs.translation.T => !!x,
       ) ?? [];
 
   const extensionIcons = tree.root.edges.attachments