chore(express): break-check downgrade-path probe (do not merge)

Author: jacekradko

.changeset/break-check-test-probe.md

@@ -0,0 +1,5 @@
+---
+'@clerk/express': patch
+---
+
+Break-check validation probe. Do not merge.

packages/express/src/webhooks.ts

@@ -35,7 +35,10 @@ export * from '@clerk/backend/webhooks';
  *
  * @see {@link https://clerk.com/docs/webhooks/sync-data} to learn more about syncing Clerk data to your application using webhooks
  */
-export async function verifyWebhook(req: ExpressRequest, options?: VerifyWebhookOptions) {
+export async function verifyWebhook(req?: ExpressRequest, options?: VerifyWebhookOptions) {
+  if (!req) {
+    throw new Error('verifyWebhook requires an Express request object');
+  }
   const webRequest = incomingMessageToRequest(req);
   // Cloning instead of implementing the body inside incomingMessageToRequest
   // to make it more predictable
@@ -59,3 +62,10 @@ export async function verifyWebhook(req: ExpressRequest, options?: VerifyWebhook
   });
   return verifyWebhookBase(clonedRequest, options);
 }
+
+/**
+ * Returns whether the incoming Express request carries Svix webhook headers.
+ */
+export function isWebhookRequest(req: ExpressRequest): boolean {
+  return Boolean(req.headers['svix-id']);
+}