diff --git a/packages/types/src/message.ts b/packages/types/src/message.ts
index 82f58f29f2..39b7ed25e3 100644
--- a/packages/types/src/message.ts
+++ b/packages/types/src/message.ts
@@ -279,6 +279,18 @@ export const clineMessageSchema = z.object({
 	isProtected: z.boolean().optional(),
 	apiProtocol: z.union([z.literal("openai"), z.literal("anthropic")]).optional(),
 	isAnswered: z.boolean().optional(),
+	/**
+	 * Optional metadata for API request tracking.
+	 * Used for background mode status display.
+	 */
+	metadata: z
+		.object({
+			background: z.boolean().optional(),
+			backgroundStatus: z
+				.enum(["queued", "in_progress", "reconnecting", "polling", "completed", "failed", "canceled"])
+				.optional(),
+		})
+		.optional(),
 })
 
 export type ClineMessage = z.infer<typeof clineMessageSchema>
diff --git a/src/api/providers/__tests__/openai-native.spec.ts b/src/api/providers/__tests__/openai-native.spec.ts
index b3500763c9..c0682d1644 100644
--- a/src/api/providers/__tests__/openai-native.spec.ts
+++ b/src/api/providers/__tests__/openai-native.spec.ts
@@ -1703,7 +1703,7 @@ describe("OpenAI Native streaming metadata tracking", () => {
 		expect(chunks).toContainEqual({ type: "text", text: "A" })
 		expect(chunks).toContainEqual({ type: "reasoning", text: "B" })
 		expect(handler.getLastSequenceNumber()).toBe(3)
-		expect(handler.getLastResponseId()).toBe("resp_123")
+		expect(handler.getResponseId()).toBe("resp_123")
 	})
 })