From 87b5e6e34a09e32c1b1910614b485851042e1573 Mon Sep 17 00:00:00 2001
From: James Brooks <jamesbrooks@spotify.com>
Date: Fri, 19 Sep 2025 12:52:31 +0100
Subject: [PATCH 1/2] Fix API error in catalog graph plugin

Signed-off-by: James Brooks <jamesbrooks@spotify.com>
---
 .changeset/cool-baboons-count.md    |  5 +++++
 plugins/catalog-graph/src/alpha.tsx | 18 ++++++++++++++++--
 2 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/cool-baboons-count.md

diff --git a/.changeset/cool-baboons-count.md b/.changeset/cool-baboons-count.md
new file mode 100644
index 0000000000..c5dac494d9
--- /dev/null
+++ b/.changeset/cool-baboons-count.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-graph': patch
+---
+
+Add missing API implementation for catalog graph plugin in NFS apps.
diff --git a/plugins/catalog-graph/src/alpha.tsx b/plugins/catalog-graph/src/alpha.tsx
index 5fc43f1b4a..9a7f15e553 100644
--- a/plugins/catalog-graph/src/alpha.tsx
+++ b/plugins/catalog-graph/src/alpha.tsx
@@ -15,6 +15,7 @@
  */
 
 import {
+  ApiBlueprint,
   createFrontendPlugin,
   PageBlueprint,
 } from '@backstage/frontend-plugin-api';
@@ -24,7 +25,11 @@ import {
 } from '@backstage/core-compat-api';
 import { EntityCardBlueprint } from '@backstage/plugin-catalog-react/alpha';
 import { catalogGraphRouteRef, catalogEntityRouteRef } from './routes';
-import { Direction } from '@backstage/plugin-catalog-graph';
+import {
+  catalogGraphApiRef,
+  DefaultCatalogGraphApi,
+  Direction,
+} from '@backstage/plugin-catalog-graph';
 
 const CatalogGraphEntityCard = EntityCardBlueprint.makeWithOverrides({
   name: 'relations',
@@ -85,6 +90,15 @@ const CatalogGraphPage = PageBlueprint.makeWithOverrides({
   },
 });
 
+const CatalogGraphApi = ApiBlueprint.make({
+  params: defineParams =>
+    defineParams({
+      api: catalogGraphApiRef,
+      deps: {},
+      factory: () => new DefaultCatalogGraphApi(),
+    }),
+});
+
 export default createFrontendPlugin({
   pluginId: 'catalog-graph',
   info: { packageJson: () => import('../package.json') },
@@ -94,7 +108,7 @@ export default createFrontendPlugin({
   externalRoutes: {
     catalogEntity: convertLegacyRouteRef(catalogEntityRouteRef),
   },
-  extensions: [CatalogGraphPage, CatalogGraphEntityCard],
+  extensions: [CatalogGraphPage, CatalogGraphEntityCard, CatalogGraphApi],
 });
 
 export { catalogGraphTranslationRef } from './translation';

From 7abd78afb2e4f00e28fd6e7dfc47714e1c252a4c Mon Sep 17 00:00:00 2001
From: James Brooks <jamesbrooks@spotify.com>
Date: Fri, 19 Sep 2025 13:16:54 +0100
Subject: [PATCH 2/2] Update API report

Signed-off-by: James Brooks <jamesbrooks@spotify.com>
---
 plugins/catalog-graph/report-alpha.api.md | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/plugins/catalog-graph/report-alpha.api.md b/plugins/catalog-graph/report-alpha.api.md
index fe852d8cf6..edf84e936a 100644
--- a/plugins/catalog-graph/report-alpha.api.md
+++ b/plugins/catalog-graph/report-alpha.api.md
@@ -3,11 +3,14 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { AnyApiFactory } from '@backstage/frontend-plugin-api';
 import { AnyRouteRefParams } from '@backstage/frontend-plugin-api';
+import { ApiFactory } from '@backstage/frontend-plugin-api';
 import { Direction } from '@backstage/plugin-catalog-graph';
 import { Entity } from '@backstage/catalog-model';
 import { EntityCardType } from '@backstage/plugin-catalog-react/alpha';
 import { EntityPredicate } from '@backstage/plugin-catalog-react/alpha';
+import { ExtensionBlueprintParams } from '@backstage/frontend-plugin-api';
 import { ExtensionDataRef } from '@backstage/frontend-plugin-api';
 import { ExtensionDefinition } from '@backstage/frontend-plugin-api';
 import { ExtensionInput } from '@backstage/frontend-plugin-api';
@@ -58,6 +61,21 @@ const _default: OverridableFrontendPlugin<
     }>;
   },
   {
+    'api:catalog-graph': ExtensionDefinition<{
+      kind: 'api';
+      name: undefined;
+      config: {};
+      configInput: {};
+      output: ExtensionDataRef<AnyApiFactory, 'core.api.factory', {}>;
+      inputs: {};
+      params: <
+        TApi,
+        TImpl extends TApi,
+        TDeps extends { [name in string]: unknown },
+      >(
+        params: ApiFactory<TApi, TImpl, TDeps>,
+      ) => ExtensionBlueprintParams<AnyApiFactory>;
+    }>;
     'entity-card:catalog-graph/relations': ExtensionDefinition<{
       config: {
         kinds: string[] | undefined;