diff --git a/packages/core/src/services/chatRecordingService.test.ts b/packages/core/src/services/chatRecordingService.test.ts
index 94b9c61c7a2..60d4aaf144e 100644
--- a/packages/core/src/services/chatRecordingService.test.ts
+++ b/packages/core/src/services/chatRecordingService.test.ts
@@ -728,10 +728,13 @@ describe('ChatRecordingService', () => {
       expect(fs.existsSync(logFile)).toBe(false);
     });
 
-    it('should not throw if session file does not exist', async () => {
+    it('should throw if session file does not exist', async () => {
+      const chatsDir = path.join(testTempDir, 'chats');
+      fs.mkdirSync(chatsDir, { recursive: true });
+
       await expect(
         chatRecordingService.deleteSession('non-existent'),
-      ).resolves.not.toThrow();
+      ).rejects.toThrow('No session file found for non-existent');
     });
   });
 
diff --git a/packages/core/src/services/chatRecordingService.ts b/packages/core/src/services/chatRecordingService.ts
index 5791184d15d..16a77e26dd8 100644
--- a/packages/core/src/services/chatRecordingService.ts
+++ b/packages/core/src/services/chatRecordingService.ts
@@ -695,6 +695,10 @@ export class ChatRecordingService {
         chatsDir,
         shortId,
       );
+      if (matchingFiles.length === 0) {
+        throw new Error(`No session file found for ${sessionIdOrBasename}`);
+      }
+
       for (const file of matchingFiles) {
         await this.deleteSessionAndArtifacts(chatsDir, file, tempDir);
       }