fix(ai): disable Azure OpenAI response storage

closes #5530

packages/ai/CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixed
 
 - Fixed Moonshot Kimi thinking-off requests to send the provider's `thinking: { type: "disabled" }` compatibility parameter ([#5531](https://github.com/earendil-works/pi/issues/5531)).
+- Fixed Azure OpenAI Responses requests to disable server-side response storage ([#5530](https://github.com/earendil-works/pi/issues/5530)).
 
 ## [0.79.0] - 2026-06-08
 

packages/ai/src/providers/azure-openai-responses.ts

@@ -256,6 +256,7 @@ function buildParams(
 		input: messages,
 		stream: true,
 		prompt_cache_key: clampOpenAIPromptCacheKey(options?.sessionId),
+		store: false,
 	};
 
 	if (options?.maxTokens) {

packages/ai/test/azure-openai-base-url.test.ts

@@ -13,6 +13,7 @@ interface CapturedAzureClientOptions {
 
 interface CapturedAzureResponsesPayload {
 	prompt_cache_key?: string;
+	store?: boolean;
 }
 
 const azureMock = vi.hoisted(() => ({
@@ -144,6 +145,16 @@ describe("azure-openai-responses base URL normalization", () => {
 		expect(azureMock.lastParams?.prompt_cache_key).toBe("x".repeat(64));
 	});
 
+	it("disables server-side response storage", async () => {
+		const model = getModel("azure-openai-responses", "gpt-4o-mini");
+		await streamAzureOpenAIResponses(model, context, {
+			apiKey: "test-api-key",
+			azureBaseUrl: "https://my-resource.openai.azure.com",
+		}).result();
+
+		expect(azureMock.lastParams?.store).toBe(false);
+	});
+
 	it("builds correct default URL from AZURE_OPENAI_RESOURCE_NAME", async () => {
 		process.env.AZURE_OPENAI_RESOURCE_NAME = "my-resource";
 		const model = getModel("azure-openai-responses", "gpt-4o-mini");