From 453bf8d0611302dc31ce10e14e081e1be4dda9c3 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Sat, 1 Nov 2025 17:26:21 -0400
Subject: [PATCH 1/2] fix: treat client/universal hooks as entrypoints for
 illegal server import detection

---
 .changeset/spotty-kings-pull.md        | 5 +++++
 packages/kit/src/exports/vite/index.js | 3 +++
 playgrounds/basic/src/hooks.ts         | 8 ++++++++
 3 files changed, 16 insertions(+)
 create mode 100644 .changeset/spotty-kings-pull.md
 create mode 100644 playgrounds/basic/src/hooks.ts

diff --git a/.changeset/spotty-kings-pull.md b/.changeset/spotty-kings-pull.md
new file mode 100644
index 000000000000..039e4ee3424c
--- /dev/null
+++ b/.changeset/spotty-kings-pull.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: treat client/universal hooks as entrypoints for illegal server import detection
diff --git a/packages/kit/src/exports/vite/index.js b/packages/kit/src/exports/vite/index.js
index 7d6cf2a9589f..68adabdd8661 100644
--- a/packages/kit/src/exports/vite/index.js
+++ b/packages/kit/src/exports/vite/index.js
@@ -598,6 +598,9 @@ async function kit({ svelte_config }) {
 					if (node.universal) entrypoints.add(node.universal);
 				}
 
+				if (manifest_data.hooks.client) entrypoints.add(manifest_data.hooks.client);
+				if (manifest_data.hooks.universal) entrypoints.add(manifest_data.hooks.universal);
+
 				const normalized = normalize_id(id, normalized_lib, normalized_cwd);
 				const chain = [normalized];
 
diff --git a/playgrounds/basic/src/hooks.ts b/playgrounds/basic/src/hooks.ts
new file mode 100644
index 000000000000..04b64b4d237b
--- /dev/null
+++ b/playgrounds/basic/src/hooks.ts
@@ -0,0 +1,8 @@
+import { getRequestEvent } from '$app/server';
+
+export const transport = {
+	Foo: {
+		encode: () => [1],
+		decode: ([n]) => n
+	}
+};

From b2b6189fb44144337ca890867b9c10a28c80db6e Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Sat, 1 Nov 2025 17:30:21 -0400
Subject: [PATCH 2/2] remove test file

---
 playgrounds/basic/src/hooks.ts | 8 --------
 1 file changed, 8 deletions(-)
 delete mode 100644 playgrounds/basic/src/hooks.ts

diff --git a/playgrounds/basic/src/hooks.ts b/playgrounds/basic/src/hooks.ts
deleted file mode 100644
index 04b64b4d237b..000000000000
--- a/playgrounds/basic/src/hooks.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import { getRequestEvent } from '$app/server';
-
-export const transport = {
-	Foo: {
-		encode: () => [1],
-		decode: ([n]) => n
-	}
-};