diff --git a/.changeset/old-tools-smell.md b/.changeset/old-tools-smell.md
new file mode 100644
index 0000000000..4dbd65e779
--- /dev/null
+++ b/.changeset/old-tools-smell.md
@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-plugin-api': patch
+---
+
+Add support for accessing extensions definitions provided by a plugin via `plugin.getExtension(...)`. For this to work the extensions must be defined using the v2 format, typically using an extension blueprint.
diff --git a/packages/app-next-example-plugin/api-report.md b/packages/app-next-example-plugin/api-report.md
index c89a7b599b..962b1473a8 100644
--- a/packages/app-next-example-plugin/api-report.md
+++ b/packages/app-next-example-plugin/api-report.md
@@ -7,7 +7,7 @@ import { BackstagePlugin } from '@backstage/frontend-plugin-api';
 import { default as React_2 } from 'react';
 
 // @public (undocumented)
-const examplePlugin: BackstagePlugin<{}, {}>;
+const examplePlugin: BackstagePlugin<{}, {}, {}>;
 export default examplePlugin;
 
 // @public (undocumented)
diff --git a/packages/frontend-plugin-api/api-report.md b/packages/frontend-plugin-api/api-report.md
index 325dbd193e..a8f8ce591b 100644
--- a/packages/frontend-plugin-api/api-report.md
+++ b/packages/frontend-plugin-api/api-report.md
@@ -275,17 +275,22 @@ export { BackstageIdentityResponse };
 
 // @public (undocumented)
 export interface BackstagePlugin<
-  Routes extends AnyRoutes = AnyRoutes,
-  ExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes,
+  TRoutes extends AnyRoutes = AnyRoutes,
+  TExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes,
+  TExtensionMap extends {
+    [id in string]: ExtensionDefinition<any, any>;
+  } = {},
 > {
   // (undocumented)
   readonly $$type: '@backstage/BackstagePlugin';
   // (undocumented)
-  readonly externalRoutes: ExternalRoutes;
+  readonly externalRoutes: TExternalRoutes;
+  // (undocumented)
+  getExtension<TId extends keyof TExtensionMap>(id: TId): TExtensionMap[TId];
   // (undocumented)
   readonly id: string;
   // (undocumented)
-  readonly routes: Routes;
+  readonly routes: TRoutes;
 }
 
 export { BackstageUserIdentity };
@@ -396,7 +401,15 @@ export function createApiExtension<
     configSchema?: PortableSchema<TConfig>;
     inputs?: TInputs;
   },
-): ExtensionDefinition<TConfig, TConfig, never, never>;
+): ExtensionDefinition<
+  TConfig,
+  TConfig,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @public (undocumented)
 export namespace createApiExtension {
@@ -492,7 +505,15 @@ export function createComponentExtension<
           inputs: Expand<ResolvedExtensionInputs<TInputs>>;
         }) => ComponentType<TProps>;
       };
-}): ExtensionDefinition<TConfig, TConfig, never, never>;
+}): ExtensionDefinition<
+  TConfig,
+  TConfig,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @public (undocumented)
 export namespace createComponentExtension {
@@ -528,8 +549,14 @@ export function createExtension<
     [key: string]: (zImpl: typeof z) => z.ZodType;
   },
   UFactoryOutput extends ExtensionDataValue<any, any>,
+  const TKind extends string | undefined = undefined,
+  const TNamespace extends string | undefined = undefined,
+  const TName extends string | undefined = undefined,
 >(
   options: CreateExtensionOptions<
+    TKind,
+    TNamespace,
+    TName,
     UOutput,
     TInputs,
     TConfigSchema,
@@ -545,7 +572,10 @@ export function createExtension<
     }>
   >,
   UOutput,
-  TInputs
+  TInputs,
+  string | undefined extends TKind ? undefined : TKind,
+  string | undefined extends TNamespace ? undefined : TNamespace,
+  string | undefined extends TName ? undefined : TName
 >;
 
 // @public @deprecated (undocumented)
@@ -580,11 +610,17 @@ export function createExtensionBlueprint<
     [key in string]: (zImpl: typeof z) => z.ZodType;
   },
   UFactoryOutput extends ExtensionDataValue<any, any>,
+  TKind extends string,
+  TNamespace extends string | undefined = undefined,
+  TName extends string | undefined = undefined,
   TDataRefs extends {
     [name in string]: AnyExtensionDataRef;
   } = never,
 >(
   options: CreateExtensionBlueprintOptions<
+    TKind,
+    TNamespace,
+    TName,
     TParams,
     UOutput,
     TInputs,
@@ -593,6 +629,9 @@ export function createExtensionBlueprint<
     TDataRefs
   >,
 ): ExtensionBlueprint<
+  TKind,
+  TNamespace,
+  TName,
   TParams,
   UOutput,
   string extends keyof TInputs ? {} : TInputs,
@@ -613,6 +652,9 @@ export function createExtensionBlueprint<
 
 // @public (undocumented)
 export type CreateExtensionBlueprintOptions<
+  TKind extends string,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   TParams,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
@@ -632,8 +674,8 @@ export type CreateExtensionBlueprintOptions<
     [name in string]: AnyExtensionDataRef;
   },
 > = {
-  kind: string;
-  namespace?: string | ((params: TParams) => string);
+  kind: TKind;
+  namespace?: TNamespace | ((params: TParams) => TNamespace);
   attachTo: {
     id: string;
     input: string;
@@ -641,7 +683,7 @@ export type CreateExtensionBlueprintOptions<
   disabled?: boolean;
   inputs?: TInputs;
   output: Array<UOutput>;
-  name?: string | ((params: TParams) => string);
+  name?: TName | ((params: TParams) => TName);
   config?: {
     schema: TConfigSchema | ((params: TParams) => TConfigSchema);
   };
@@ -714,6 +756,9 @@ export function createExtensionInput<
 
 // @public (undocumented)
 export type CreateExtensionOptions<
+  TKind extends string | undefined,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
     [inputName in string]: ExtensionInput<
@@ -729,9 +774,9 @@ export type CreateExtensionOptions<
   },
   UFactoryOutput extends ExtensionDataValue<any, any>,
 > = {
-  kind?: string;
-  namespace?: string;
-  name?: string;
+  kind?: TKind;
+  namespace?: TNamespace;
+  name?: TName;
   attachTo: {
     id: string;
     input: string;
@@ -794,7 +839,10 @@ export function createNavItemExtension(options: {
     title?: string | undefined;
   },
   never,
-  never
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
 >;
 
 // @public (undocumented)
@@ -817,7 +865,15 @@ export function createNavLogoExtension(options: {
   namespace?: string;
   logoIcon: JSX.Element;
   logoFull: JSX.Element;
-}): ExtensionDefinition<unknown, unknown, never, never>;
+}): ExtensionDefinition<
+  unknown,
+  unknown,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @public (undocumented)
 export namespace createNavLogoExtension {
@@ -865,11 +921,22 @@ export function createPageExtension<
 
 // @public (undocumented)
 export function createPlugin<
-  Routes extends AnyRoutes = {},
-  ExternalRoutes extends AnyExternalRoutes = {},
+  TId extends string,
+  TRoutes extends AnyRoutes = {},
+  TExternalRoutes extends AnyExternalRoutes = {},
+  TExtensions extends readonly ExtensionDefinition<any, any>[] = [],
 >(
-  options: PluginOptions<Routes, ExternalRoutes>,
-): BackstagePlugin<Routes, ExternalRoutes>;
+  options: PluginOptions<TId, TRoutes, TExternalRoutes, TExtensions>,
+): BackstagePlugin<
+  TRoutes,
+  TExternalRoutes,
+  {
+    [KExtension in TExtensions[number] as ResolveExtensionId<
+      KExtension,
+      TId
+    >]: KExtension;
+  }
+>;
 
 // @public
 export function createRouteRef<
@@ -972,7 +1039,15 @@ export function createSubRouteRef<
 // @public (undocumented)
 export function createThemeExtension(
   theme: AppTheme,
-): ExtensionDefinition<unknown, unknown, never, never>;
+): ExtensionDefinition<
+  unknown,
+  unknown,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @public (undocumented)
 export namespace createThemeExtension {
@@ -988,7 +1063,15 @@ export namespace createThemeExtension {
 export function createTranslationExtension(options: {
   name?: string;
   resource: TranslationResource | TranslationMessages;
-}): ExtensionDefinition<unknown, unknown, never, never>;
+}): ExtensionDefinition<
+  unknown,
+  unknown,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @public (undocumented)
 export namespace createTranslationExtension {
@@ -1044,6 +1127,9 @@ export interface Extension<TConfig, TConfigInput = TConfig> {
 
 // @public (undocumented)
 export interface ExtensionBlueprint<
+  TKind extends string,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   TParams,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
@@ -1068,6 +1154,8 @@ export interface ExtensionBlueprint<
   // (undocumented)
   dataRefs: TDataRefs;
   make<
+    TNewNamespace extends string | undefined,
+    TNewName extends string | undefined,
     TExtensionConfigSchema extends {
       [key in string]: (zImpl: typeof z) => z.ZodType;
     },
@@ -1084,8 +1172,8 @@ export interface ExtensionBlueprint<
     },
   >(
     args: {
-      namespace?: string;
-      name?: string;
+      namespace?: TNewNamespace;
+      name?: TNewName;
       attachTo?: {
         id: string;
         input: string;
@@ -1143,7 +1231,12 @@ export interface ExtensionBlueprint<
         >;
       }>
     > &
-      TConfigInput
+      TConfigInput,
+    AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput,
+    TInputs & TExtraInputs,
+    TKind,
+    string | undefined extends TNewNamespace ? TNamespace : TNewNamespace,
+    string | undefined extends TNewName ? TName : TNewName
   >;
 }
 
@@ -1239,6 +1332,9 @@ export interface ExtensionDefinition<
       }
     >;
   } = {},
+  TKind extends string | undefined = string | undefined,
+  TNamespace extends string | undefined = string | undefined,
+  TName extends string | undefined = string | undefined,
 > {
   // (undocumented)
   $$type: '@backstage/ExtensionDefinition';
@@ -1252,11 +1348,11 @@ export interface ExtensionDefinition<
   // (undocumented)
   readonly disabled: boolean;
   // (undocumented)
-  readonly kind?: string;
+  readonly kind?: TKind;
   // (undocumented)
-  readonly name?: string;
+  readonly name?: TName;
   // (undocumented)
-  readonly namespace?: string;
+  readonly namespace?: TNamespace;
   // (undocumented)
   override<
     TExtensionConfigSchema extends {
@@ -1325,7 +1421,10 @@ export interface ExtensionDefinition<
     > &
       TConfigInput,
     AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput,
-    TInputs & TExtraInputs
+    TInputs & TExtraInputs,
+    TKind,
+    TNamespace,
+    TName
   >;
 }
 
@@ -1405,6 +1504,9 @@ export { googleAuthApiRef };
 
 // @public (undocumented)
 export const IconBundleBlueprint: ExtensionBlueprint<
+  'icon-bundle',
+  'app',
+  undefined,
   {
     icons: {
       [x: string]: IconComponent;
@@ -1536,19 +1638,21 @@ export { PendingOAuthRequest };
 
 // @public (undocumented)
 export interface PluginOptions<
-  Routes extends AnyRoutes,
-  ExternalRoutes extends AnyExternalRoutes,
+  TId extends string,
+  TRoutes extends AnyRoutes,
+  TExternalRoutes extends AnyExternalRoutes,
+  TExtensions extends readonly ExtensionDefinition<any, any>[],
 > {
   // (undocumented)
-  extensions?: ExtensionDefinition<any, any>[];
+  extensions?: TExtensions;
   // (undocumented)
-  externalRoutes?: ExternalRoutes;
+  externalRoutes?: TExternalRoutes;
   // (undocumented)
   featureFlags?: FeatureFlagConfig[];
   // (undocumented)
-  id: string;
+  id: TId;
   // (undocumented)
-  routes?: Routes;
+  routes?: TRoutes;
 }
 
 // @public (undocumented)
diff --git a/packages/frontend-plugin-api/src/wiring/createExtension.ts b/packages/frontend-plugin-api/src/wiring/createExtension.ts
index 600b96ebe0..f2d3d906ab 100644
--- a/packages/frontend-plugin-api/src/wiring/createExtension.ts
+++ b/packages/frontend-plugin-api/src/wiring/createExtension.ts
@@ -174,6 +174,9 @@ export type VerifyExtensionFactoryOutput<
 
 /** @public */
 export type CreateExtensionOptions<
+  TKind extends string | undefined,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
     [inputName in string]: ExtensionInput<
@@ -184,9 +187,9 @@ export type CreateExtensionOptions<
   TConfigSchema extends { [key: string]: (zImpl: typeof z) => z.ZodType },
   UFactoryOutput extends ExtensionDataValue<any, any>,
 > = {
-  kind?: string;
-  namespace?: string;
-  name?: string;
+  kind?: TKind;
+  namespace?: TNamespace;
+  name?: TName;
   attachTo: { id: string; input: string };
   disabled?: boolean;
   inputs?: TInputs;
@@ -214,11 +217,14 @@ export interface ExtensionDefinition<
       { optional: boolean; singleton: boolean }
     >;
   } = {},
+  TKind extends string | undefined = string | undefined,
+  TNamespace extends string | undefined = string | undefined,
+  TName extends string | undefined = string | undefined,
 > {
   $$type: '@backstage/ExtensionDefinition';
-  readonly kind?: string;
-  readonly namespace?: string;
-  readonly name?: string;
+  readonly kind?: TKind;
+  readonly namespace?: TNamespace;
+  readonly name?: TName;
   readonly attachTo: { id: string; input: string };
   readonly disabled: boolean;
   readonly configSchema?: PortableSchema<TConfig, TConfigInput>;
@@ -284,45 +290,68 @@ export interface ExtensionDefinition<
     > &
       TConfigInput,
     AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput,
-    TInputs & TExtraInputs
+    TInputs & TExtraInputs,
+    TKind,
+    TNamespace,
+    TName
   >;
 }
 
 /** @internal */
-export type InternalExtensionDefinition<TConfig, TConfigInput> =
-  ExtensionDefinition<TConfig, TConfigInput> &
-    (
-      | {
-          readonly version: 'v1';
-          readonly inputs: AnyExtensionInputMap;
-          readonly output: AnyExtensionDataMap;
-          factory(context: {
-            node: AppNode;
-            config: TConfig;
-            inputs: ResolvedExtensionInputs<AnyExtensionInputMap>;
-          }): ExtensionDataValues<any>;
-        }
-      | {
-          readonly version: 'v2';
-          readonly inputs: {
+export type InternalExtensionDefinition<
+  TConfig,
+  TConfigInput = TConfig,
+  UOutput extends AnyExtensionDataRef = AnyExtensionDataRef,
+  TInputs extends {
+    [inputName in string]: ExtensionInput<
+      AnyExtensionDataRef,
+      { optional: boolean; singleton: boolean }
+    >;
+  } = {},
+  TKind extends string | undefined = string | undefined,
+  TNamespace extends string | undefined = string | undefined,
+  TName extends string | undefined = string | undefined,
+> = ExtensionDefinition<
+  TConfig,
+  TConfigInput,
+  UOutput,
+  TInputs,
+  TKind,
+  TNamespace,
+  TName
+> &
+  (
+    | {
+        readonly version: 'v1';
+        readonly inputs: AnyExtensionInputMap;
+        readonly output: AnyExtensionDataMap;
+        factory(context: {
+          node: AppNode;
+          config: TConfig;
+          inputs: ResolvedExtensionInputs<AnyExtensionInputMap>;
+        }): ExtensionDataValues<any>;
+      }
+    | {
+        readonly version: 'v2';
+        readonly inputs: {
+          [inputName in string]: ExtensionInput<
+            AnyExtensionDataRef,
+            { optional: boolean; singleton: boolean }
+          >;
+        };
+        readonly output: Array<AnyExtensionDataRef>;
+        factory(context: {
+          node: AppNode;
+          config: TConfig;
+          inputs: ResolvedExtensionInputs<{
             [inputName in string]: ExtensionInput<
               AnyExtensionDataRef,
               { optional: boolean; singleton: boolean }
             >;
-          };
-          readonly output: Array<AnyExtensionDataRef>;
-          factory(context: {
-            node: AppNode;
-            config: TConfig;
-            inputs: ResolvedExtensionInputs<{
-              [inputName in string]: ExtensionInput<
-                AnyExtensionDataRef,
-                { optional: boolean; singleton: boolean }
-              >;
-            }>;
-          }): Iterable<ExtensionDataValue<any, any>>;
-        }
-    );
+          }>;
+        }): Iterable<ExtensionDataValue<any, any>>;
+      }
+  );
 
 /** @internal */
 export function toInternalExtensionDefinition<TConfig, TConfigInput>(
@@ -357,8 +386,14 @@ export function createExtension<
   },
   TConfigSchema extends { [key: string]: (zImpl: typeof z) => z.ZodType },
   UFactoryOutput extends ExtensionDataValue<any, any>,
+  const TKind extends string | undefined = undefined,
+  const TNamespace extends string | undefined = undefined,
+  const TName extends string | undefined = undefined,
 >(
   options: CreateExtensionOptions<
+    TKind,
+    TNamespace,
+    TName,
     UOutput,
     TInputs,
     TConfigSchema,
@@ -374,7 +409,10 @@ export function createExtension<
     }>
   >,
   UOutput,
-  TInputs
+  TInputs,
+  string | undefined extends TKind ? undefined : TKind,
+  string | undefined extends TNamespace ? undefined : TNamespace,
+  string | undefined extends TName ? undefined : TName
 >;
 /**
  * @public
@@ -394,6 +432,9 @@ export function createExtension<
   >,
 ): ExtensionDefinition<TConfig, TConfigInput, never, never>;
 export function createExtension<
+  const TKind extends string | undefined,
+  const TNamespace extends string | undefined,
+  const TName extends string | undefined,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
     [inputName in string]: ExtensionInput<
@@ -408,7 +449,15 @@ export function createExtension<
   UFactoryOutput extends ExtensionDataValue<any, any>,
 >(
   options:
-    | CreateExtensionOptions<UOutput, TInputs, TConfigSchema, UFactoryOutput>
+    | CreateExtensionOptions<
+        TKind,
+        TNamespace,
+        TName,
+        UOutput,
+        TInputs,
+        TConfigSchema,
+        UFactoryOutput
+      >
     | LegacyCreateExtensionOptions<
         AnyExtensionDataMap,
         TLegacyInputs,
@@ -431,7 +480,10 @@ export function createExtension<
           }>
         >),
   UOutput,
-  TInputs
+  TInputs,
+  TKind,
+  TNamespace,
+  TName
 > {
   if ('configSchema' in options && 'config' in options) {
     throw new Error(`Cannot provide both configSchema and config.schema`);
@@ -542,7 +594,10 @@ export function createExtension<
         >
       >,
       AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput,
-      TInputs & TExtraInputs
+      TInputs & TExtraInputs,
+      TKind,
+      TNamespace,
+      TName
     > => {
       if (!Array.isArray(options.output)) {
         throw new Error(
@@ -550,6 +605,9 @@ export function createExtension<
         );
       }
       const newOptions = options as CreateExtensionOptions<
+        TKind,
+        TNamespace,
+        TName,
         UOutput,
         TInputs,
         TConfigSchema,
@@ -612,7 +670,7 @@ export function createExtension<
 
           return deduplicatedResult.values() as Iterable<UOverrideFactoryOutput>;
         },
-      } as CreateExtensionOptions<AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput, TInputs & TExtraInputs, TConfigSchema & TExtensionConfigSchema, UOverrideFactoryOutput>);
+      } as CreateExtensionOptions<TKind, TNamespace, TName, AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput, TInputs & TExtraInputs, TConfigSchema & TExtensionConfigSchema, UOverrideFactoryOutput>);
     },
   } as InternalExtensionDefinition<
     TConfig &
@@ -630,6 +688,11 @@ export function createExtension<
             z.ZodObject<{
               [key in keyof TConfigSchema]: ReturnType<TConfigSchema[key]>;
             }>
-          >)
+          >),
+    UOutput,
+    TInputs,
+    TKind,
+    TNamespace,
+    TName
   >;
 }
diff --git a/packages/frontend-plugin-api/src/wiring/createExtensionBlueprint.ts b/packages/frontend-plugin-api/src/wiring/createExtensionBlueprint.ts
index a8bf42c7f8..81137f47e2 100644
--- a/packages/frontend-plugin-api/src/wiring/createExtensionBlueprint.ts
+++ b/packages/frontend-plugin-api/src/wiring/createExtensionBlueprint.ts
@@ -36,6 +36,9 @@ import {
  * @public
  */
 export type CreateExtensionBlueprintOptions<
+  TKind extends string,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   TParams,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
@@ -48,13 +51,13 @@ export type CreateExtensionBlueprintOptions<
   UFactoryOutput extends ExtensionDataValue<any, any>,
   TDataRefs extends { [name in string]: AnyExtensionDataRef },
 > = {
-  kind: string;
-  namespace?: string | ((params: TParams) => string);
+  kind: TKind;
+  namespace?: TNamespace | ((params: TParams) => TNamespace);
   attachTo: { id: string; input: string };
   disabled?: boolean;
   inputs?: TInputs;
   output: Array<UOutput>;
-  name?: string | ((params: TParams) => string);
+  name?: TName | ((params: TParams) => TName);
   config?: {
     schema: TConfigSchema | ((params: TParams) => TConfigSchema);
   };
@@ -76,6 +79,9 @@ export type CreateExtensionBlueprintOptions<
  * @public
  */
 export interface ExtensionBlueprint<
+  TKind extends string,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   TParams,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
@@ -97,6 +103,8 @@ export interface ExtensionBlueprint<
    * optionally call the original factory with the same params.
    */
   make<
+    TNewNamespace extends string | undefined,
+    TNewName extends string | undefined,
     TExtensionConfigSchema extends {
       [key in string]: (zImpl: typeof z) => z.ZodType;
     },
@@ -110,8 +118,8 @@ export interface ExtensionBlueprint<
     },
   >(
     args: {
-      namespace?: string;
-      name?: string;
+      namespace?: TNewNamespace;
+      name?: TNewName;
       attachTo?: { id: string; input: string };
       disabled?: boolean;
       inputs?: TExtraInputs & {
@@ -166,7 +174,12 @@ export interface ExtensionBlueprint<
         >;
       }>
     > &
-      TConfigInput
+      TConfigInput,
+    AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput,
+    TInputs & TExtraInputs,
+    TKind,
+    string | undefined extends TNewNamespace ? TNamespace : TNewNamespace,
+    string | undefined extends TNewName ? TName : TNewName
   >;
 }
 
@@ -198,6 +211,9 @@ export function createDataContainer<UData extends AnyExtensionDataRef>(
  * @internal
  */
 class ExtensionBlueprintImpl<
+  TKind extends string,
+  TNamespace extends string | undefined,
+  TName extends string | undefined,
   TParams,
   UOutput extends AnyExtensionDataRef,
   TInputs extends {
@@ -211,6 +227,9 @@ class ExtensionBlueprintImpl<
 > {
   constructor(
     private readonly options: CreateExtensionBlueprintOptions<
+      TKind,
+      TNamespace,
+      TName,
       TParams,
       UOutput,
       TInputs,
@@ -236,9 +255,11 @@ class ExtensionBlueprintImpl<
         { optional: boolean; singleton: boolean }
       >;
     },
+    TNewNamespace extends string | undefined = undefined,
+    TNewName extends string | undefined = undefined,
   >(args: {
-    namespace?: string;
-    name?: string;
+    namespace?: TNewNamespace;
+    name?: TNewName;
     attachTo?: { id: string; input: string };
     disabled?: boolean;
     inputs?: TExtraInputs;
@@ -360,26 +381,7 @@ class ExtensionBlueprintImpl<
         }
         throw new Error('Either params or factory must be provided');
       },
-    } as CreateExtensionOptions<UOutput, TInputs & TExtraInputs, TConfigSchema & TExtensionConfigSchema, UFactoryOutput>) as ExtensionDefinition<
-      {
-        [key in keyof TExtensionConfigSchema]: z.infer<
-          ReturnType<TExtensionConfigSchema[key]>
-        >;
-      } & {
-        [key in keyof TConfigSchema]: z.infer<ReturnType<TConfigSchema[key]>>;
-      },
-      z.input<
-        z.ZodObject<
-          {
-            [key in keyof TExtensionConfigSchema]: ReturnType<
-              TExtensionConfigSchema[key]
-            >;
-          } & {
-            [key in keyof TConfigSchema]: ReturnType<TConfigSchema[key]>;
-          }
-        >
-      >
-    >;
+    } as CreateExtensionOptions<TKind, string | undefined extends TNewNamespace ? TNamespace : TNewNamespace, string | undefined extends TNewName ? TName : TNewName, AnyExtensionDataRef extends UNewOutput ? UOutput : UNewOutput, TInputs & TExtraInputs, TConfigSchema & TExtensionConfigSchema, UFactoryOutput>);
   }
 }
 
@@ -400,9 +402,15 @@ export function createExtensionBlueprint<
   },
   TConfigSchema extends { [key in string]: (zImpl: typeof z) => z.ZodType },
   UFactoryOutput extends ExtensionDataValue<any, any>,
+  TKind extends string,
+  TNamespace extends string | undefined = undefined,
+  TName extends string | undefined = undefined,
   TDataRefs extends { [name in string]: AnyExtensionDataRef } = never,
 >(
   options: CreateExtensionBlueprintOptions<
+    TKind,
+    TNamespace,
+    TName,
     TParams,
     UOutput,
     TInputs,
@@ -411,6 +419,9 @@ export function createExtensionBlueprint<
     TDataRefs
   >,
 ): ExtensionBlueprint<
+  TKind,
+  TNamespace,
+  TName,
   TParams,
   UOutput,
   string extends keyof TInputs ? {} : TInputs,
@@ -427,6 +438,9 @@ export function createExtensionBlueprint<
   TDataRefs
 > {
   return new ExtensionBlueprintImpl(options) as ExtensionBlueprint<
+    TKind,
+    TNamespace,
+    TName,
     TParams,
     UOutput,
     string extends keyof TInputs ? {} : TInputs,
diff --git a/packages/frontend-plugin-api/src/wiring/createPlugin.test.ts b/packages/frontend-plugin-api/src/wiring/createPlugin.test.ts
index bb9bdc2107..0242e2961a 100644
--- a/packages/frontend-plugin-api/src/wiring/createPlugin.test.ts
+++ b/packages/frontend-plugin-api/src/wiring/createPlugin.test.ts
@@ -34,11 +34,9 @@ const nameExtensionDataRef = createExtensionDataRef<string>().with({
 const Extension1 = createExtension({
   name: '1',
   attachTo: { id: 'test/output', input: 'names' },
-  output: {
-    name: nameExtensionDataRef,
-  },
+  output: [nameExtensionDataRef],
   factory() {
-    return { name: 'extension-1' };
+    return [nameExtensionDataRef('extension-1')];
   },
 });
 
@@ -150,6 +148,8 @@ describe('createPlugin', () => {
     });
     expect(plugin).toBeDefined();
 
+    expect(plugin.getExtension('test/1')).toBe(Extension1);
+
     await renderWithEffects(
       createTestAppRoot({
         features: [plugin],
diff --git a/packages/frontend-plugin-api/src/wiring/createPlugin.ts b/packages/frontend-plugin-api/src/wiring/createPlugin.ts
index b671d95d2f..1d2a12ffe2 100644
--- a/packages/frontend-plugin-api/src/wiring/createPlugin.ts
+++ b/packages/frontend-plugin-api/src/wiring/createPlugin.ts
@@ -17,6 +17,7 @@
 import { ExtensionDefinition } from './createExtension';
 import {
   Extension,
+  ResolveExtensionId,
   resolveExtensionDefinition,
 } from './resolveExtensionDefinition';
 import {
@@ -28,21 +29,23 @@ import {
 
 /** @public */
 export interface PluginOptions<
-  Routes extends AnyRoutes,
-  ExternalRoutes extends AnyExternalRoutes,
+  TId extends string,
+  TRoutes extends AnyRoutes,
+  TExternalRoutes extends AnyExternalRoutes,
+  TExtensions extends readonly ExtensionDefinition<any, any>[],
 > {
-  id: string;
-  routes?: Routes;
-  externalRoutes?: ExternalRoutes;
-  extensions?: ExtensionDefinition<any, any>[];
+  id: TId;
+  routes?: TRoutes;
+  externalRoutes?: TExternalRoutes;
+  extensions?: TExtensions;
   featureFlags?: FeatureFlagConfig[];
 }
 
 /** @public */
 export interface InternalBackstagePlugin<
-  Routes extends AnyRoutes = AnyRoutes,
-  ExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes,
-> extends BackstagePlugin<Routes, ExternalRoutes> {
+  TRoutes extends AnyRoutes = AnyRoutes,
+  TExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes,
+> extends BackstagePlugin<TRoutes, TExternalRoutes> {
   readonly version: 'v1';
   readonly extensions: Extension<unknown>[];
   readonly featureFlags: FeatureFlagConfig[];
@@ -50,17 +53,36 @@ export interface InternalBackstagePlugin<
 
 /** @public */
 export function createPlugin<
-  Routes extends AnyRoutes = {},
-  ExternalRoutes extends AnyExternalRoutes = {},
+  TId extends string,
+  TRoutes extends AnyRoutes = {},
+  TExternalRoutes extends AnyExternalRoutes = {},
+  TExtensions extends readonly ExtensionDefinition<any, any>[] = [],
 >(
-  options: PluginOptions<Routes, ExternalRoutes>,
-): BackstagePlugin<Routes, ExternalRoutes> {
-  const extensions = (options.extensions ?? []).map(def =>
-    resolveExtensionDefinition(def, { namespace: options.id }),
-  );
+  options: PluginOptions<TId, TRoutes, TExternalRoutes, TExtensions>,
+): BackstagePlugin<
+  TRoutes,
+  TExternalRoutes,
+  {
+    [KExtension in TExtensions[number] as ResolveExtensionId<
+      KExtension,
+      TId
+    >]: KExtension;
+  }
+> {
+  const extensions = new Array<Extension<unknown>>();
+  const extensionDefinitionsById = new Map<
+    string,
+    ExtensionDefinition<unknown>
+  >();
 
-  const extensionIds = extensions.map(e => e.id);
-  if (extensionIds.length !== new Set(extensionIds).size) {
+  for (const def of options.extensions ?? []) {
+    const ext = resolveExtensionDefinition(def, { namespace: options.id });
+    extensions.push(ext);
+    extensionDefinitionsById.set(ext.id, def);
+  }
+
+  if (extensions.length !== extensionDefinitionsById.size) {
+    const extensionIds = extensions.map(e => e.id);
     const duplicates = Array.from(
       new Set(
         extensionIds.filter((id, index) => extensionIds.indexOf(id) !== index),
@@ -78,14 +100,17 @@ export function createPlugin<
     $$type: '@backstage/BackstagePlugin',
     version: 'v1',
     id: options.id,
-    routes: options.routes ?? ({} as Routes),
-    externalRoutes: options.externalRoutes ?? ({} as ExternalRoutes),
+    routes: options.routes ?? ({} as TRoutes),
+    externalRoutes: options.externalRoutes ?? ({} as TExternalRoutes),
     featureFlags: options.featureFlags ?? [],
     extensions,
+    getExtension(id) {
+      return extensionDefinitionsById.get(id);
+    },
     toString() {
       return `Plugin{id=${options.id}}`;
     },
-  } as InternalBackstagePlugin<Routes, ExternalRoutes>;
+  } as InternalBackstagePlugin<TRoutes, TExternalRoutes>;
 }
 
 /** @internal */
diff --git a/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.test.ts b/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.test.ts
index 74d081e95d..5a42e9100e 100644
--- a/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.test.ts
+++ b/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.test.ts
@@ -15,7 +15,10 @@
  */
 
 import { ExtensionDefinition } from './createExtension';
-import { resolveExtensionDefinition } from './resolveExtensionDefinition';
+import {
+  ResolveExtensionId,
+  resolveExtensionDefinition,
+} from './resolveExtensionDefinition';
 
 describe('resolveExtensionDefinition', () => {
   const baseDef = {
@@ -98,3 +101,103 @@ describe('old resolveExtensionDefinition', () => {
     );
   });
 });
+
+describe('ResolveExtensionId', () => {
+  it('should resolve extension IDs correctly', () => {
+    type NamedExtension<
+      TKind extends string | undefined,
+      TNamespace extends string | undefined,
+      TName extends string | undefined,
+    > = ExtensionDefinition<any, any, any, any, TKind, TNamespace, TName>;
+
+    const id1: 'k:ns' = {} as ResolveExtensionId<
+      NamedExtension<'k', 'ns', undefined>,
+      undefined
+    >;
+    const id2: 'k:n' = {} as ResolveExtensionId<
+      NamedExtension<'k', undefined, 'n'>,
+      undefined
+    >;
+    const id3: 'ns/n' = {} as ResolveExtensionId<
+      NamedExtension<undefined, 'ns', 'n'>,
+      undefined
+    >;
+    const id4: never = {} as ResolveExtensionId<
+      NamedExtension<'k', undefined, undefined>,
+      undefined
+    >;
+    const id5: 'ns' = {} as ResolveExtensionId<
+      NamedExtension<undefined, 'ns', undefined>,
+      undefined
+    >;
+    const id6: 'n' = {} as ResolveExtensionId<
+      NamedExtension<undefined, undefined, 'n'>,
+      undefined
+    >;
+    const id7: 'k:ns/n' = {} as ResolveExtensionId<
+      NamedExtension<'k', 'ns', 'n'>,
+      undefined
+    >;
+    const id8: 'k:ns2' = {} as ResolveExtensionId<
+      NamedExtension<'k', 'ns', undefined>,
+      'ns2'
+    >;
+    const id9: 'k:ns2/n' = {} as ResolveExtensionId<
+      NamedExtension<'k', undefined, 'n'>,
+      'ns2'
+    >;
+    const ida: 'ns2/n' = {} as ResolveExtensionId<
+      NamedExtension<undefined, 'ns', 'n'>,
+      'ns2'
+    >;
+    const idb: 'k:ns2' = {} as ResolveExtensionId<
+      NamedExtension<'k', undefined, undefined>,
+      'ns2'
+    >;
+    const idc: 'ns2' = {} as ResolveExtensionId<
+      NamedExtension<undefined, 'ns', undefined>,
+      'ns2'
+    >;
+    const idd: 'ns2/n' = {} as ResolveExtensionId<
+      NamedExtension<undefined, undefined, 'n'>,
+      'ns2'
+    >;
+    const ide: 'k:ns2/n' = {} as ResolveExtensionId<
+      NamedExtension<'k', 'ns', 'n'>,
+      'ns2'
+    >;
+
+    const invalid1: never = {} as ResolveExtensionId<
+      NamedExtension<string | undefined, 'ns', 'n'>,
+      undefined
+    >;
+    const invalid2: never = {} as ResolveExtensionId<
+      NamedExtension<'k', string | undefined, 'n'>,
+      undefined
+    >;
+    const invalid3: never = {} as ResolveExtensionId<
+      NamedExtension<'k', 'ns', string | undefined>,
+      undefined
+    >;
+
+    expect([
+      id1,
+      id2,
+      id3,
+      id4,
+      id5,
+      id6,
+      id7,
+      id8,
+      id9,
+      ida,
+      idb,
+      idc,
+      idd,
+      ide,
+      invalid1,
+      invalid2,
+      invalid3,
+    ]).toBeDefined();
+  });
+});
diff --git a/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.ts b/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.ts
index 0c8a7959f7..35bf9c6b05 100644
--- a/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.ts
+++ b/packages/frontend-plugin-api/src/wiring/resolveExtensionDefinition.ts
@@ -94,6 +94,36 @@ export function toInternalExtension<TConfig, TConfigInput>(
   return internal;
 }
 
+/** @ignore */
+export type ResolveExtensionId<
+  TExtension extends ExtensionDefinition<any>,
+  TDefaultNamespace extends string | undefined,
+> = TExtension extends ExtensionDefinition<
+  any,
+  any,
+  any,
+  any,
+  infer IKind,
+  infer INamespace,
+  infer IName
+>
+  ? [string | undefined] extends [IKind | INamespace | IName]
+    ? never
+    : (
+        (
+          undefined extends TDefaultNamespace ? INamespace : TDefaultNamespace
+        ) extends infer ISelectedNamespace extends string
+          ? undefined extends IName
+            ? ISelectedNamespace
+            : `${ISelectedNamespace}/${IName}`
+          : IName
+      ) extends infer INamePart extends string
+    ? IKind extends string
+      ? `${IKind}:${INamePart}`
+      : INamePart
+    : never
+  : never;
+
 /** @internal */
 export function resolveExtensionDefinition<TConfig, TConfigInput>(
   definition: ExtensionDefinition<TConfig, TConfigInput>,
diff --git a/packages/frontend-plugin-api/src/wiring/types.ts b/packages/frontend-plugin-api/src/wiring/types.ts
index 7e0650e06c..b1afd4e7ea 100644
--- a/packages/frontend-plugin-api/src/wiring/types.ts
+++ b/packages/frontend-plugin-api/src/wiring/types.ts
@@ -15,6 +15,7 @@
  */
 
 import { ExternalRouteRef, RouteRef, SubRouteRef } from '../routing';
+import { ExtensionDefinition } from './createExtension';
 
 /**
  * Feature flag configuration.
@@ -32,15 +33,24 @@ export type AnyRoutes = { [name in string]: RouteRef | SubRouteRef };
 /** @public */
 export type AnyExternalRoutes = { [name in string]: ExternalRouteRef };
 
+/** @public */
+export type ExtensionMap<
+  TExtensionMap extends { [id in string]: ExtensionDefinition<any, any> },
+> = {
+  get<TId extends keyof TExtensionMap>(id: TId): TExtensionMap[TId];
+};
+
 /** @public */
 export interface BackstagePlugin<
-  Routes extends AnyRoutes = AnyRoutes,
-  ExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes,
+  TRoutes extends AnyRoutes = AnyRoutes,
+  TExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes,
+  TExtensionMap extends { [id in string]: ExtensionDefinition<any, any> } = {},
 > {
   readonly $$type: '@backstage/BackstagePlugin';
   readonly id: string;
-  readonly routes: Routes;
-  readonly externalRoutes: ExternalRoutes;
+  readonly routes: TRoutes;
+  readonly externalRoutes: TExternalRoutes;
+  getExtension<TId extends keyof TExtensionMap>(id: TId): TExtensionMap[TId];
 }
 
 /** @public */
diff --git a/plugins/api-docs/api-report-alpha.md b/plugins/api-docs/api-report-alpha.md
index f17ba0fa3c..6003056cb3 100644
--- a/plugins/api-docs/api-report-alpha.md
+++ b/plugins/api-docs/api-report-alpha.md
@@ -14,7 +14,8 @@ const _default: BackstagePlugin<
   },
   {
     registerApi: ExternalRouteRef<undefined>;
-  }
+  },
+  {}
 >;
 export default _default;
 
diff --git a/plugins/app-visualizer/api-report.md b/plugins/app-visualizer/api-report.md
index 764caa7190..fd3749b159 100644
--- a/plugins/app-visualizer/api-report.md
+++ b/plugins/app-visualizer/api-report.md
@@ -6,7 +6,7 @@
 import { BackstagePlugin } from '@backstage/frontend-plugin-api';
 
 // @public (undocumented)
-const visualizerPlugin: BackstagePlugin<{}, {}>;
+const visualizerPlugin: BackstagePlugin<{}, {}, {}>;
 export default visualizerPlugin;
 
 // (No @packageDocumentation comment for this package)
diff --git a/plugins/catalog-graph/api-report-alpha.md b/plugins/catalog-graph/api-report-alpha.md
index 88b3a38b76..e651946463 100644
--- a/plugins/catalog-graph/api-report-alpha.md
+++ b/plugins/catalog-graph/api-report-alpha.md
@@ -18,7 +18,8 @@ const _default: BackstagePlugin<
       kind: string;
       namespace: string;
     }>;
-  }
+  },
+  {}
 >;
 export default _default;
 
diff --git a/plugins/catalog-import/api-report-alpha.md b/plugins/catalog-import/api-report-alpha.md
index 63e2cda339..51e3d99fd7 100644
--- a/plugins/catalog-import/api-report-alpha.md
+++ b/plugins/catalog-import/api-report-alpha.md
@@ -11,6 +11,7 @@ const _default: BackstagePlugin<
   {
     importPage: RouteRef<undefined>;
   },
+  {},
   {}
 >;
 export default _default;
diff --git a/plugins/catalog-react/api-report-alpha.md b/plugins/catalog-react/api-report-alpha.md
index 3ff0788b04..edfa183903 100644
--- a/plugins/catalog-react/api-report-alpha.md
+++ b/plugins/catalog-react/api-report-alpha.md
@@ -115,7 +115,15 @@ export function createEntityCardExtension<
     config: TConfig;
     inputs: Expand<ResolvedExtensionInputs<TInputs>>;
   }) => Promise<JSX.Element>;
-}): ExtensionDefinition<TConfig, TConfig, never, never>;
+}): ExtensionDefinition<
+  TConfig,
+  TConfig,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @alpha (undocumented)
 export function createEntityContentExtension<
@@ -150,7 +158,10 @@ export function createEntityContentExtension<
     path?: string | undefined;
   },
   never,
-  never
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
 >;
 
 // @alpha
diff --git a/plugins/catalog/api-report-alpha.md b/plugins/catalog/api-report-alpha.md
index 726ee80573..5019fc25ea 100644
--- a/plugins/catalog/api-report-alpha.md
+++ b/plugins/catalog/api-report-alpha.md
@@ -108,7 +108,15 @@ export function createCatalogFilterExtension<
   inputs?: TInputs;
   configSchema?: PortableSchema<TConfig>;
   loader: (options: { config: TConfig }) => Promise<JSX.Element>;
-}): ExtensionDefinition<TConfig, TConfig, never, never>;
+}): ExtensionDefinition<
+  TConfig,
+  TConfig,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @alpha (undocumented)
 const _default: BackstagePlugin<
@@ -132,7 +140,8 @@ const _default: BackstagePlugin<
       templateName: string;
     }>;
     unregisterRedirect: ExternalRouteRef<undefined>;
-  }
+  },
+  {}
 >;
 export default _default;
 
diff --git a/plugins/devtools/api-report-alpha.md b/plugins/devtools/api-report-alpha.md
index 59aefd3698..23ede8144c 100644
--- a/plugins/devtools/api-report-alpha.md
+++ b/plugins/devtools/api-report-alpha.md
@@ -11,6 +11,7 @@ const _default: BackstagePlugin<
   {
     root: RouteRef<undefined>;
   },
+  {},
   {}
 >;
 export default _default;
diff --git a/plugins/home/api-report-alpha.md b/plugins/home/api-report-alpha.md
index eb693a8e6f..0f9b980a78 100644
--- a/plugins/home/api-report-alpha.md
+++ b/plugins/home/api-report-alpha.md
@@ -7,7 +7,7 @@ import { BackstagePlugin } from '@backstage/frontend-plugin-api';
 import { ConfigurableExtensionDataRef } from '@backstage/frontend-plugin-api';
 
 // @alpha (undocumented)
-const _default: BackstagePlugin<{}, {}>;
+const _default: BackstagePlugin<{}, {}, {}>;
 export default _default;
 
 // @alpha (undocumented)
diff --git a/plugins/kubernetes/api-report-alpha.md b/plugins/kubernetes/api-report-alpha.md
index 8bd6e98baa..befbcf379a 100644
--- a/plugins/kubernetes/api-report-alpha.md
+++ b/plugins/kubernetes/api-report-alpha.md
@@ -11,6 +11,7 @@ const _default: BackstagePlugin<
   {
     kubernetes: RouteRef<undefined>;
   },
+  {},
   {}
 >;
 export default _default;
diff --git a/plugins/org/api-report-alpha.md b/plugins/org/api-report-alpha.md
index e7c4db2c6d..be74cde141 100644
--- a/plugins/org/api-report-alpha.md
+++ b/plugins/org/api-report-alpha.md
@@ -11,7 +11,8 @@ const _default: BackstagePlugin<
   {},
   {
     catalogIndex: ExternalRouteRef<undefined>;
-  }
+  },
+  {}
 >;
 export default _default;
 
diff --git a/plugins/scaffolder/api-report-alpha.md b/plugins/scaffolder/api-report-alpha.md
index 4628563be2..de0fc463a9 100644
--- a/plugins/scaffolder/api-report-alpha.md
+++ b/plugins/scaffolder/api-report-alpha.md
@@ -36,7 +36,8 @@ const _default: BackstagePlugin<
       kind: string;
       namespace: string;
     }>;
-  }
+  },
+  {}
 >;
 export default _default;
 
diff --git a/plugins/search-react/api-report-alpha.md b/plugins/search-react/api-report-alpha.md
index 56c0b6eab9..4bcdbb3f78 100644
--- a/plugins/search-react/api-report-alpha.md
+++ b/plugins/search-react/api-report-alpha.md
@@ -25,7 +25,15 @@ export function createSearchResultListItemExtension<
   },
 >(
   options: SearchResultItemExtensionOptions<TConfig>,
-): ExtensionDefinition<TConfig, TConfig, never, never>;
+): ExtensionDefinition<
+  TConfig,
+  TConfig,
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @alpha (undocumented)
 export namespace createSearchResultListItemExtension {
diff --git a/plugins/search/api-report-alpha.md b/plugins/search/api-report-alpha.md
index bb670522e4..e6f91d6d19 100644
--- a/plugins/search/api-report-alpha.md
+++ b/plugins/search/api-report-alpha.md
@@ -13,12 +13,21 @@ const _default: BackstagePlugin<
   {
     root: RouteRef<undefined>;
   },
+  {},
   {}
 >;
 export default _default;
 
 // @alpha (undocumented)
-export const searchApi: ExtensionDefinition<{}, {}, never, never>;
+export const searchApi: ExtensionDefinition<
+  {},
+  {},
+  never,
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
+>;
 
 // @alpha (undocumented)
 export const searchNavItem: ExtensionDefinition<
@@ -29,7 +38,10 @@ export const searchNavItem: ExtensionDefinition<
     title?: string | undefined;
   },
   never,
-  never
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
 >;
 
 // @alpha (undocumented)
@@ -43,7 +55,10 @@ export const searchPage: ExtensionDefinition<
     noTrack: boolean;
   },
   AnyExtensionDataRef,
-  {}
+  {},
+  string | undefined,
+  string | undefined,
+  string | undefined
 >;
 
 // (No @packageDocumentation comment for this package)
diff --git a/plugins/techdocs/api-report-alpha.md b/plugins/techdocs/api-report-alpha.md
index e3c48ba214..f7c6679139 100644
--- a/plugins/techdocs/api-report-alpha.md
+++ b/plugins/techdocs/api-report-alpha.md
@@ -18,6 +18,7 @@ const _default: BackstagePlugin<
     }>;
     entityContent: RouteRef<undefined>;
   },
+  {},
   {}
 >;
 export default _default;
@@ -39,7 +40,10 @@ export const techDocsSearchResultListItemExtension: ExtensionDefinition<
     title?: string | undefined;
   },
   never,
-  never
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
 >;
 
 // (No @packageDocumentation comment for this package)
diff --git a/plugins/user-settings/api-report-alpha.md b/plugins/user-settings/api-report-alpha.md
index d0fad90e08..700e06a7ad 100644
--- a/plugins/user-settings/api-report-alpha.md
+++ b/plugins/user-settings/api-report-alpha.md
@@ -13,6 +13,7 @@ const _default: BackstagePlugin<
   {
     root: RouteRef<undefined>;
   },
+  {},
   {}
 >;
 export default _default;
@@ -26,7 +27,10 @@ export const settingsNavItem: ExtensionDefinition<
     title?: string | undefined;
   },
   never,
-  never
+  never,
+  string | undefined,
+  string | undefined,
+  string | undefined
 >;
 
 // @alpha (undocumented)