diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index f592073a..16cd6869 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -9,6 +9,7 @@ export type SourceType =
   | 'salesforce';
 
 export interface Source {
+  id: string;
   type: SourceType;
   data?: {
     url?: string;
diff --git a/packages/react/src/chat/ChatView.test.tsx b/packages/react/src/chat/ChatView.test.tsx
index 1ca958ca..53879a85 100644
--- a/packages/react/src/chat/ChatView.test.tsx
+++ b/packages/react/src/chat/ChatView.test.tsx
@@ -520,7 +520,10 @@ describe('ChatView', () => {
     response = [{ content: 'answer' }];
     const references = [
       {
-        file: { path: '/page1', source: { type: 'file-upload' as const } },
+        file: {
+          path: '/page1',
+          source: { id: '0', type: 'file-upload' as const },
+        },
         meta: { leadHeading: { value: 'Page 1' } },
       },
     ];
@@ -542,7 +545,10 @@ describe('ChatView', () => {
     response = [{ content: 'answer' }];
     const references = [
       {
-        file: { path: '/page1', source: { type: 'file-upload' as const } },
+        file: {
+          path: '/page1',
+          source: { id: '0', type: 'file-upload' as const },
+        },
         meta: { leadHeading: { value: 'Page 1' } },
       },
     ];
@@ -569,7 +575,10 @@ describe('ChatView', () => {
     response = [{ content: 'answer' }];
     const references = [
       {
-        file: { path: '/page1', source: { type: 'file-upload' as const } },
+        file: {
+          path: '/page1',
+          source: { id: '0', type: 'file-upload' as const },
+        },
         meta: { leadHeading: { value: 'Page 1' } },
       },
     ];
diff --git a/packages/react/src/constants.test.ts b/packages/react/src/constants.test.ts
index d029c7b3..0b58b658 100644
--- a/packages/react/src/constants.test.ts
+++ b/packages/react/src/constants.test.ts
@@ -14,8 +14,8 @@ const heading = 'Heading 1';
 const headingSlug = 'heading-1';
 const headingId = 'generated-id';
 const noTitleFileName = 'no-title';
-const githubSource: Source = { type: 'github' };
-const websiteSource: Source = { type: 'website' };
+const githubSource: Source = { id: '0', type: 'github' };
+const websiteSource: Source = { id: '0', type: 'website' };
 const shortContent = 'Some content';
 
 const loremIpsum =
diff --git a/packages/react/src/primitives/headless.test.tsx b/packages/react/src/primitives/headless.test.tsx
index 66a78ee8..f9eb1dcc 100644
--- a/packages/react/src/primitives/headless.test.tsx
+++ b/packages/react/src/primitives/headless.test.tsx
@@ -240,7 +240,9 @@ test('References renders the passed ReferenceComponent', () => {
   render(
     <Markprompt.References
       references={[
-        { file: { path: '/path/to/file', source: { type: 'github' } } },
+        {
+          file: { path: '/path/to/file', source: { id: '0', type: 'github' } },
+        },
       ]}
       ReferenceComponent={ReferenceComponent}
     />,
diff --git a/packages/react/src/search/SearchView.test.tsx b/packages/react/src/search/SearchView.test.tsx
index 646ff42f..f70b2685 100644
--- a/packages/react/src/search/SearchView.test.tsx
+++ b/packages/react/src/search/SearchView.test.tsx
@@ -81,14 +81,17 @@ describe('SearchView', () => {
 
     results = [
       {
-        file: { path: 'path/to/file', source: { type: 'github' } },
+        file: {
+          path: 'path/to/file',
+          source: { id: '0', type: 'github' },
+        },
         matchType: 'title',
       },
       {
         file: {
           path: 'path/to/file',
           title: 'result 1',
-          source: { type: 'github' },
+          source: { id: '0', type: 'github' },
         },
         matchType: 'title',
       },
@@ -96,7 +99,7 @@ describe('SearchView', () => {
         file: {
           path: 'path/to/file',
           title: 'result 2',
-          source: { type: 'github' },
+          source: { id: '0', type: 'github' },
         },
         matchType: 'title',
         meta: {
@@ -108,7 +111,7 @@ describe('SearchView', () => {
       {
         file: {
           path: 'path/to/file',
-          source: { type: 'github' },
+          source: { id: '0', type: 'github' },
         },
         matchType: 'leadHeading',
         meta: {
@@ -121,7 +124,7 @@ describe('SearchView', () => {
       {
         file: {
           path: 'path/to/file',
-          source: { type: 'github' },
+          source: { id: '0', type: 'github' },
         },
         meta: {
           leadHeading: {
@@ -177,14 +180,17 @@ describe('SearchView', () => {
 
       results = [
         {
-          file: { path: 'path/to/file', source: { type: 'github' } },
+          file: {
+            path: 'path/to/file',
+            source: { id: '0', type: 'github' },
+          },
           matchType: 'title',
         },
         {
           file: {
             path: 'path/to/file',
             title: 'result 1',
-            source: { type: 'github' },
+            source: { id: '0', type: 'github' },
           },
           matchType: 'title',
         },
@@ -192,7 +198,7 @@ describe('SearchView', () => {
           file: {
             path: 'path/to/file',
             title: 'result 2',
-            source: { type: 'github' },
+            source: { id: '0', type: 'github' },
           },
           matchType: 'title',
           meta: {
@@ -265,7 +271,10 @@ describe('SearchView', () => {
 
     results = [
       {
-        file: { path: 'path/to/file', source: { type: 'github' } },
+        file: {
+          path: 'path/to/file',
+          source: { id: '0', type: 'github' },
+        },
         matchType: 'title',
       },
     ];
@@ -300,7 +309,10 @@ describe('SearchView', () => {
 
     results = [
       {
-        file: { path: '#file', source: { type: 'github' } },
+        file: {
+          path: '#file',
+          source: { id: '0', type: 'github' },
+        },
         matchType: 'title',
       },
     ];
@@ -330,7 +342,7 @@ describe('SearchView', () => {
         file: {
           path: 'path/to/file',
           title: 'test',
-          source: { type: 'github' },
+          source: { id: '0', type: 'github' },
         },
         matchType: 'title',
       },
@@ -414,7 +426,10 @@ describe('SearchView', () => {
 
     results = [
       {
-        file: { path: 'path/to/file', source: { type: 'github' } },
+        file: {
+          path: 'path/to/file',
+          source: { id: '0', type: 'github' },
+        },
         matchType: 'title',
       },
     ];
diff --git a/packages/react/src/search/useSearch.test.ts b/packages/react/src/search/useSearch.test.ts
index 4a8ae94c..7cdaac4a 100644
--- a/packages/react/src/search/useSearch.test.ts
+++ b/packages/react/src/search/useSearch.test.ts
@@ -82,6 +82,7 @@ describe('useSearch', () => {
           title: 'Home page',
           path: '/',
           source: {
+            id: '0',
             type: 'file-upload',
           },
         },
@@ -91,6 +92,7 @@ describe('useSearch', () => {
         file: {
           path: '/page1',
           source: {
+            id: '0',
             type: 'file-upload',
           },
         },
@@ -104,6 +106,7 @@ describe('useSearch', () => {
         file: {
           path: '/page2',
           source: {
+            id: '0',
             type: 'file-upload',
           },
         },