From 6d80801779dfe44ed8dc2f1fef07337acd4249b4 Mon Sep 17 00:00:00 2001
From: mukunda katta <mukunda.vjcs6@gmail.com>
Date: Tue, 21 Apr 2026 08:18:19 -0700
Subject: [PATCH] fix(gateway): include caching in provider options

---
 .../src/gateway-language-model.test.ts        | 20 +++++++++++++++++++
 .../gateway/src/gateway-provider-options.ts   |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/packages/gateway/src/gateway-language-model.test.ts b/packages/gateway/src/gateway-language-model.test.ts
index 1cd8aa488345..5d7ddcb3951c 100644
--- a/packages/gateway/src/gateway-language-model.test.ts
+++ b/packages/gateway/src/gateway-language-model.test.ts
@@ -1482,6 +1482,26 @@ describe('GatewayLanguageModel', () => {
       });
     });
 
+    it('should allow caching in provider options', async () => {
+      prepareJsonResponse({
+        content: { type: 'text', text: 'Test response' },
+      });
+
+      await createTestModel().doGenerate({
+        prompt: TEST_PROMPT,
+        providerOptions: {
+          gateway: {
+            caching: 'auto',
+          },
+        },
+      });
+
+      const requestBody = await server.calls[0].requestBodyJson;
+      expect(requestBody.providerOptions).toEqual({
+        gateway: { caching: 'auto' },
+      });
+    });
+
     it('should pass providerTimeouts for doGenerate', async () => {
       prepareJsonResponse({
         content: { type: 'text', text: 'Test response' },
diff --git a/packages/gateway/src/gateway-provider-options.ts b/packages/gateway/src/gateway-provider-options.ts
index 5a808d505b7a..61165d04cb4e 100644
--- a/packages/gateway/src/gateway-provider-options.ts
+++ b/packages/gateway/src/gateway-provider-options.ts
@@ -5,6 +5,12 @@ import { z } from 'zod/v4';
 const gatewayProviderOptions = lazySchema(() =>
   zodSchema(
     z.object({
+      /**
+       * Controls prompt caching behavior for the selected provider/model.
+       *
+       * Example: `'auto'` enables provider-managed automatic caching when supported.
+       */
+      caching: z.enum(['auto']).optional(),
       /**
        * Array of provider slugs that are the only ones allowed to be used.
        *