From 24659c501b49cdad0732ce846b3251896402b84c Mon Sep 17 00:00:00 2001
From: Patrick O'Donnell <podonnell@cloudflare.com>
Date: Mon, 21 Sep 2026 15:06:07 -0400
Subject: [PATCH] WC-5584 [wrangler] previews: fix wrangler-action missing
 worker_name

---
 .changeset/warm-cats-preview.md                 |  7 +++++++
 packages/deploy-helpers/src/preview/api.ts      |  1 -
 packages/wrangler/src/__tests__/preview.test.ts | 16 +++++++++-------
 packages/wrangler/src/preview/preview.ts        |  4 ++--
 4 files changed, 18 insertions(+), 10 deletions(-)
 create mode 100644 .changeset/warm-cats-preview.md

diff --git a/.changeset/warm-cats-preview.md b/.changeset/warm-cats-preview.md
new file mode 100644
index 00000000000..fb5a68e04ee
--- /dev/null
+++ b/.changeset/warm-cats-preview.md
@@ -0,0 +1,7 @@
+---
+"wrangler": patch
+---
+
+Fix Preview output artifacts to always include the resolved parent Worker name
+
+Preview artifacts now use Wrangler's resolved Worker name instead of relying on the Preview API response to include it.
diff --git a/packages/deploy-helpers/src/preview/api.ts b/packages/deploy-helpers/src/preview/api.ts
index be345826ebf..76db24f0db5 100644
--- a/packages/deploy-helpers/src/preview/api.ts
+++ b/packages/deploy-helpers/src/preview/api.ts
@@ -70,7 +70,6 @@ export interface PreviewResource {
 	name: string;
 	slug: string;
 	urls?: string[];
-	worker_name: string;
 	tags?: string[];
 	observability?: Observability;
 	logpush?: boolean;
diff --git a/packages/wrangler/src/__tests__/preview.test.ts b/packages/wrangler/src/__tests__/preview.test.ts
index 40df213851b..1c53f8cd6fe 100644
--- a/packages/wrangler/src/__tests__/preview.test.ts
+++ b/packages/wrangler/src/__tests__/preview.test.ts
@@ -3075,7 +3075,7 @@ describe("wrangler preview", () => {
 			expect(std.warn).not.toContain("ASSETS");
 		});
 
-		test("should output preview and deployment JSON with --json", async ({
+		test("should output preview and deployment JSON for wrangler-action when the Preview API omits the Worker name", async ({
 			expect,
 		}) => {
 			const outputFile = "./output.json";
@@ -3103,7 +3103,6 @@ describe("wrangler preview", () => {
 									name: "test-preview",
 									slug: "test-preview",
 									urls: ["https://test-preview.test-worker.cloudflare.app"],
-									worker_name: "test-worker",
 									created_on: new Date().toISOString(),
 								},
 							},
@@ -3131,10 +3130,13 @@ describe("wrangler preview", () => {
 				)
 			);
 
-			await runWrangler("preview --name test-preview --json", {
-				...process.env,
-				WRANGLER_OUTPUT_FILE_PATH: outputFile,
-			});
+			await runWrangler(
+				"preview --name test-preview --worker-name override-worker --json",
+				{
+					...process.env,
+					WRANGLER_OUTPUT_FILE_PATH: outputFile,
+				}
+			);
 
 			expect(std.out).toContain('"preview"');
 			expect(std.out).toContain('"deployment"');
@@ -3150,7 +3152,7 @@ describe("wrangler preview", () => {
 				expect.objectContaining({
 					type: "preview",
 					version: 1,
-					worker_name: "test-worker",
+					worker_name: "override-worker",
 					preview_id: "preview-id-json",
 					preview_name: "test-preview",
 					preview_slug: "test-preview",
diff --git a/packages/wrangler/src/preview/preview.ts b/packages/wrangler/src/preview/preview.ts
index a3d075fb6fa..60280e4ce33 100644
--- a/packages/wrangler/src/preview/preview.ts
+++ b/packages/wrangler/src/preview/preview.ts
@@ -1,4 +1,4 @@
-import { preview } from "@cloudflare/deploy-helpers";
+import { preview, resolveWorkerName } from "@cloudflare/deploy-helpers";
 import { getWranglerTmpDir } from "@cloudflare/workers-utils";
 import { getAssetsOptions } from "../assets";
 import { getNormalizedContainerOptions } from "../containers/config";
@@ -135,7 +135,7 @@ export const previewCommand = createCommand({
 		writeOutput({
 			type: "preview",
 			version: 1,
-			worker_name: previewResource.worker_name,
+			worker_name: resolveWorkerName(args, previewConfig),
 			preview_id: previewResource.id,
 			preview_name: previewResource.name,
 			preview_slug: previewResource.slug,