fix(xai): default store to false for Responses (#36629)

Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/opencode/src/provider/transform.ts

@@ -1102,7 +1102,8 @@ export function options(input: {
     input.model.providerID === "openai" ||
     input.model.api.npm === "@ai-sdk/openai" ||
     input.model.api.npm === "@ai-sdk/github-copilot" ||
-    input.model.api.npm === "@ai-sdk/amazon-bedrock/mantle"
+    input.model.api.npm === "@ai-sdk/amazon-bedrock/mantle" ||
+    input.model.api.npm === "@ai-sdk/xai"
   ) {
     result["store"] = false
   }
@@ -1257,7 +1258,8 @@ export function smallOptions(model: Provider.Model) {
   if (
     model.providerID === "openai" ||
     model.api.npm === "@ai-sdk/openai" ||
-    model.api.npm === "@ai-sdk/github-copilot"
+    model.api.npm === "@ai-sdk/github-copilot" ||
+    model.api.npm === "@ai-sdk/xai"
   ) {
     const base = { store: false }
     return mergeDeep(base, small)

packages/opencode/test/provider/transform.test.ts

@@ -156,6 +156,43 @@ describe("ProviderTransform.options - setCacheKey", () => {
     expect(result.store).toBe(false)
   })
 
+  test("should set store=false for xAI provider by default", () => {
+    const xaiModel = {
+      ...mockModel,
+      providerID: "xai",
+      api: {
+        id: "grok-4",
+        url: "https://api.x.ai",
+        npm: "@ai-sdk/xai",
+      },
+    }
+    const result = ProviderTransform.options({
+      model: xaiModel,
+      sessionID,
+      providerOptions: {},
+    })
+    expect(result.store).toBe(false)
+    expect(result.promptCacheKey).toBe(sessionID)
+  })
+
+  test("should set store=false for xAI SDK regardless of provider ID", () => {
+    const xaiModel = {
+      ...mockModel,
+      providerID: "custom-xai",
+      api: {
+        id: "grok-4",
+        url: "https://api.x.ai",
+        npm: "@ai-sdk/xai",
+      },
+    }
+    const result = ProviderTransform.options({
+      model: xaiModel,
+      sessionID,
+      providerOptions: {},
+    })
+    expect(result.store).toBe(false)
+  })
+
   test("should set store=false for azure provider by default", () => {
     const azureModel = {
       ...mockModel,