From 4a5addaadc613245d140c467619c1f15267aaba3 Mon Sep 17 00:00:00 2001
From: Nic Polumeyv <162764842+Nic-Polumeyv@users.noreply.github.com>
Date: Wed, 29 Jul 2026 21:56:45 -0400
Subject: [PATCH 1/5] breaking: exclude directories without a `+page` or
 `+server` from `RouteId`

---
 .changeset/routeid-only-real-routes.md         |  5 +++++
 .../docs/98-reference/22-$app-types.md         |  4 +++-
 .../core/sync/create_manifest_data/index.js    | 18 ++++++++++++++++++
 packages/kit/src/core/sync/write_app_types.js  | 13 +++++++++----
 .../kit/src/core/sync/write_types/index.js     |  7 +++++--
 .../sync/write_types/test/app-types/+page.js   |  5 ++++-
 packages/kit/src/exports/vite/index.js         | 15 +++++++++++----
 packages/kit/src/types/ambient.d.ts            |  8 +++++---
 packages/kit/test/apps/basics/test/test.js     |  2 ++
 packages/kit/types/index.d.ts                  |  8 +++++---
 10 files changed, 67 insertions(+), 18 deletions(-)
 create mode 100644 .changeset/routeid-only-real-routes.md

diff --git a/.changeset/routeid-only-real-routes.md b/.changeset/routeid-only-real-routes.md
new file mode 100644
index 000000000000..6104c72f0735
--- /dev/null
+++ b/.changeset/routeid-only-real-routes.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': major
+---
+
+breaking: only include routes with a `+page` or `+server` in `RouteId` and `$app/manifest`
diff --git a/documentation/docs/98-reference/22-$app-types.md b/documentation/docs/98-reference/22-$app-types.md
index 0663a89ea385..d2a9934fed7f 100644
--- a/documentation/docs/98-reference/22-$app-types.md
+++ b/documentation/docs/98-reference/22-$app-types.md
@@ -82,10 +82,12 @@ type RouteParams<T extends RouteId> = { /* generated */ } | Record<string, never
 
 A utility for getting the parameters associated with a given layout, which is similar to `RouteParams` but also includes optional parameters for any child route.
 
+Unlike `RouteId`, this accepts any directory in `src/routes`, since a layout can live in a directory that has no `+page` or `+server` of its own.
+
 <div class="ts-block">
 
 ```dts
-type RouteParams<T extends RouteId> = { /* generated */ } | Record<string, never>;
+type LayoutParams<T extends '/' | '/my-route' | '/my-other-route'> = { /* generated */ };
 ```
 
 </div>
diff --git a/packages/kit/src/core/sync/create_manifest_data/index.js b/packages/kit/src/core/sync/create_manifest_data/index.js
index 5cdf83a03cb8..c4b76d5e5d85 100644
--- a/packages/kit/src/core/sync/create_manifest_data/index.js
+++ b/packages/kit/src/core/sync/create_manifest_data/index.js
@@ -41,6 +41,24 @@ export default function create_manifest_data({
 	};
 }
 
+/**
+ * Whether the router can match this route. `manifest_data.routes` also contains an entry for
+ * every other directory in `src/routes`, so that layouts and params can be resolved, and those
+ * ids never reach `event.route.id`.
+ * @param {import('types').RouteData} route
+ */
+export function is_app_route(route) {
+	return !!(route.page || route.endpoint);
+}
+
+/**
+ * Returns the routes that `$app/manifest` exposes and that `RouteId` is generated from.
+ * @param {import('types').ManifestData} manifest_data
+ */
+export function get_app_routes(manifest_data) {
+	return manifest_data.routes.filter(is_app_route).map((route) => ({ id: route.id }));
+}
+
 /**
  * Returns a list of files in the `static` directory.
  * @param {import('types').ValidatedConfig} config
diff --git a/packages/kit/src/core/sync/write_app_types.js b/packages/kit/src/core/sync/write_app_types.js
index e8a76fdc25d6..1ee63c19d923 100644
--- a/packages/kit/src/core/sync/write_app_types.js
+++ b/packages/kit/src/core/sync/write_app_types.js
@@ -5,6 +5,7 @@ import { posixify } from '../../utils/os.js';
 import { write_if_changed } from './utils.js';
 import { s } from '../../utils/misc.js';
 import { get_route_segments } from '../../utils/routing.js';
+import { get_app_routes, is_app_route } from './create_manifest_data/index.js';
 
 const replace_optional_params = (/** @type {string} */ id) =>
 	id.replace(/\/\[\[[^\]]+\]\]/g, '${string}');
@@ -203,9 +204,9 @@ function generate_app_types(manifest_data, config, dir) {
 				const type = get_matcher_type(p.matcher);
 				return `${/^\w+$/.test(p.name) ? p.name : `'${p.name}'`}${p.optional ? '?:' : ':'} ${type}${p.optional ? ' | undefined' : ''}`;
 			});
-			const route_type = `${s(route.id)}: { ${params.join('; ')} }`;
-
-			dynamic_routes.push(route_type);
+			if (is_app_route(route)) {
+				dynamic_routes.push(`${s(route.id)}: { ${params.join('; ')} }`);
+			}
 
 			normalized_pathname = replace_required_params(replace_optional_params(pathname)).slice(1);
 			serialise = (p) => `\`${p}\` & {}`;
@@ -237,7 +238,11 @@ function generate_app_types(manifest_data, config, dir) {
 	return [
 		'declare module "$app/types" {',
 		'\texport interface AppTypes {',
-		`\t\tRouteId(): ${manifest_data.routes.map((r) => s(r.id)).join(' | ')};`,
+		`\t\tRouteId(): ${
+			get_app_routes(manifest_data)
+				.map((route) => s(route.id))
+				.join(' | ') || 'never'
+		};`,
 		`\t\tRouteParams(): {\n\t\t\t${dynamic_routes.join(';\n\t\t\t')}\n\t\t};`,
 		`\t\tLayoutParams(): {\n\t\t\t${layouts.join(';\n\t\t\t')}\n\t\t};`,
 		`\t\tPath(): ${Array.from(pathnames).join(' | ')};`,
diff --git a/packages/kit/src/core/sync/write_types/index.js b/packages/kit/src/core/sync/write_types/index.js
index 184766fbf85c..09d02365e13a 100644
--- a/packages/kit/src/core/sync/write_types/index.js
+++ b/packages/kit/src/core/sync/write_types/index.js
@@ -5,6 +5,7 @@ import { rimraf, walk, resolve_entry } from '../../../utils/filesystem.js';
 import { compact } from '../../../utils/array.js';
 import { posixify } from '../../../utils/os.js';
 import { ts } from '../ts.js';
+import { is_app_route } from '../create_manifest_data/index.js';
 const remove_relative_parent_traversals = (/** @type {string} */ path) =>
 	path.replace(/\.\.\//g, '');
 const is_whitespace = (/** @type {string} */ char) => /\s/.test(char);
@@ -278,7 +279,9 @@ function update_types(config, routes, route, root, to_delete = new Set()) {
 		let all_pages_have_load = true;
 		/** @type {import('types').RouteParam[]} */
 		const layout_params = [];
-		const ids = ['RouteId'];
+		// a layout can live in a directory that has no `+page` or `+server`, in which case its
+		// own id is never the matched route
+		const ids = is_app_route(route) ? ['RouteId'] : [];
 
 		route.layout.child_pages?.forEach((page) => {
 			const leaf = routes.get(page);
@@ -312,7 +315,7 @@ function update_types(config, routes, route, root, to_delete = new Set()) {
 			ids.push('null');
 		}
 
-		declarations.push(`type LayoutRouteId = ${ids.join(' | ')}`);
+		declarations.push(`type LayoutRouteId = ${ids.join(' | ') || 'never'}`);
 
 		declarations.push(
 			'type LayoutParams = RouteParams & ' + generate_params_type(layout_params, outdir, config)
diff --git a/packages/kit/src/core/sync/write_types/test/app-types/+page.js b/packages/kit/src/core/sync/write_types/test/app-types/+page.js
index ee5b3a316821..94e128fafbde 100644
--- a/packages/kit/src/core/sync/write_types/test/app-types/+page.js
+++ b/packages/kit/src/core/sync/write_types/test/app-types/+page.js
@@ -7,9 +7,12 @@ id = '/foo/[bar]/[baz]';
 id = '/(group)/path-a';
 
 // @ts-expect-error
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 id = '/nope';
 
+// @ts-expect-error `/foo` is a directory with no `+page` or `+server`, so it is not a route
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+id = '/foo';
+
 /** @type {import('$app/types').RouteParams<'/foo/[bar]/[baz]'>} */
 const params = {
 	bar: 'A',
diff --git a/packages/kit/src/exports/vite/index.js b/packages/kit/src/exports/vite/index.js
index f5a8f5633d50..e88ebd0aaaa6 100644
--- a/packages/kit/src/exports/vite/index.js
+++ b/packages/kit/src/exports/vite/index.js
@@ -46,6 +46,7 @@ import analyse from '../../core/postbuild/analyse.js';
 import { s } from '../../utils/misc.js';
 import { hash } from '../../utils/hash.js';
 import { dedent } from '../../core/sync/utils.js';
+import { get_app_routes } from '../../core/sync/create_manifest_data/index.js';
 import { get_import_aliases, get_hash_import_keys } from '../../utils/imports.js';
 import {
 	app_env_private,
@@ -1129,7 +1130,9 @@ function kit({ svelte_config }) {
 					];
 
 					export const routes = [
-						${manifest_data.routes.map((route) => s({ id: route.id })).join(',\n')}
+						${get_app_routes(manifest_data)
+							.map((route) => s(route))
+							.join(',\n')}
 					];
 					`;
 				}
@@ -1571,7 +1574,7 @@ function kit({ svelte_config }) {
 			// the client build and after prerendering respectively.
 			replace_manifest_placeholder_variables(server_chunks, `${out}/server`, {
 				assets: manifest_data.assets.map((asset) => ({ path: asset.file })),
-				routes: manifest_data.routes.map((route) => ({ id: route.id }))
+				routes: get_app_routes(manifest_data)
 			});
 
 			const verbose = builder.config.logLevel === 'info';
@@ -1733,7 +1736,7 @@ function kit({ svelte_config }) {
 				replace_manifest_placeholder_variables(client_chunks, `${out}/client`, {
 					immutable,
 					assets: manifest_data.assets.map((asset) => ({ path: asset.file })),
-					routes: manifest_data.routes.map((route) => ({ id: route.id }))
+					routes: get_app_routes(manifest_data)
 				});
 
 				// Now that the client build is done, replace the `build` sentinel
@@ -2145,7 +2148,11 @@ const create_manifest_data_module = (is_build, manifest_data) => {
 	// In dev, `manifest_data` may not be set yet on the very first load,
 	// but `configureServer` (which calls `sync.create`) runs before any
 	// module is served, so it will be set by the time this is called.
-	const routes = manifest_data?.routes.map((route) => s({ id: route.id })).join(',\n') ?? '';
+	const routes = manifest_data
+		? get_app_routes(manifest_data)
+				.map((route) => s(route))
+				.join(',\n')
+		: '';
 	const assets = manifest_data?.assets.map((asset) => s({ path: asset.file })).join(',\n') ?? '';
 
 	return dedent`
diff --git a/packages/kit/src/types/ambient.d.ts b/packages/kit/src/types/ambient.d.ts
index 288495ddc974..ea7a35f957b1 100644
--- a/packages/kit/src/types/ambient.d.ts
+++ b/packages/kit/src/types/ambient.d.ts
@@ -121,10 +121,12 @@ declare module '$app/types' {
 
 	/**
 	 * A utility for getting the parameters associated with a given layout, which is similar to `RouteParams` but also includes optional parameters for any child route.
+	 *
+	 * Unlike `RouteId`, this accepts any directory in `src/routes`, since a layout can live in a directory that has no `+page` or `+server` of its own.
 	 */
-	export type LayoutParams<T extends RouteId> = T extends keyof ReturnType<AppTypes['LayoutParams']>
-		? ReturnType<AppTypes['LayoutParams']>[T]
-		: Record<string, never>;
+	export type LayoutParams<T extends keyof ReturnType<AppTypes['LayoutParams']>> = ReturnType<
+		AppTypes['LayoutParams']
+	>[T];
 
 	/**
 	 * A union of all valid paths in your app, relative to the `base` path.
diff --git a/packages/kit/test/apps/basics/test/test.js b/packages/kit/test/apps/basics/test/test.js
index 908e760ca214..2202bbcb77c1 100644
--- a/packages/kit/test/apps/basics/test/test.js
+++ b/packages/kit/test/apps/basics/test/test.js
@@ -782,6 +782,8 @@ test.describe('$app/manifest', () => {
 		expect(ids).toContain('/');
 		expect(ids).toContain('/app-manifest');
 		expect(ids).toContain('/routing');
+		// `/accessibility` only holds a layout and child routes, so it isn't a route itself
+		expect(ids).not.toContain('/accessibility');
 	});
 
 	test('exposes static assets', async ({ page }) => {
diff --git a/packages/kit/types/index.d.ts b/packages/kit/types/index.d.ts
index 2e3440aab488..e8ed2e0e6987 100644
--- a/packages/kit/types/index.d.ts
+++ b/packages/kit/types/index.d.ts
@@ -3809,10 +3809,12 @@ declare module '$app/types' {
 
 	/**
 	 * A utility for getting the parameters associated with a given layout, which is similar to `RouteParams` but also includes optional parameters for any child route.
+	 *
+	 * Unlike `RouteId`, this accepts any directory in `src/routes`, since a layout can live in a directory that has no `+page` or `+server` of its own.
 	 */
-	export type LayoutParams<T extends RouteId> = T extends keyof ReturnType<AppTypes['LayoutParams']>
-		? ReturnType<AppTypes['LayoutParams']>[T]
-		: Record<string, never>;
+	export type LayoutParams<T extends keyof ReturnType<AppTypes['LayoutParams']>> = ReturnType<
+		AppTypes['LayoutParams']
+	>[T];
 
 	/**
 	 * A union of all valid paths in your app, relative to the `base` path.

From 37b819d309c6538bd7948253115b748ca281989e Mon Sep 17 00:00:00 2001
From: Nic Polumeyv <162764842+Nic-Polumeyv@users.noreply.github.com>
Date: Thu, 30 Jul 2026 14:16:39 -0400
Subject: [PATCH 2/5] defer to #16588 for `$app/manifest`

---
 .changeset/routeid-only-real-routes.md     |  2 +-
 packages/kit/src/exports/vite/index.js     | 15 ++++-----------
 packages/kit/test/apps/basics/test/test.js |  2 --
 3 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/.changeset/routeid-only-real-routes.md b/.changeset/routeid-only-real-routes.md
index 6104c72f0735..014f1c6e160e 100644
--- a/.changeset/routeid-only-real-routes.md
+++ b/.changeset/routeid-only-real-routes.md
@@ -2,4 +2,4 @@
 '@sveltejs/kit': major
 ---
 
-breaking: only include routes with a `+page` or `+server` in `RouteId` and `$app/manifest`
+breaking: only include routes with a `+page` or `+server` in `RouteId`
diff --git a/packages/kit/src/exports/vite/index.js b/packages/kit/src/exports/vite/index.js
index e88ebd0aaaa6..f5a8f5633d50 100644
--- a/packages/kit/src/exports/vite/index.js
+++ b/packages/kit/src/exports/vite/index.js
@@ -46,7 +46,6 @@ import analyse from '../../core/postbuild/analyse.js';
 import { s } from '../../utils/misc.js';
 import { hash } from '../../utils/hash.js';
 import { dedent } from '../../core/sync/utils.js';
-import { get_app_routes } from '../../core/sync/create_manifest_data/index.js';
 import { get_import_aliases, get_hash_import_keys } from '../../utils/imports.js';
 import {
 	app_env_private,
@@ -1130,9 +1129,7 @@ function kit({ svelte_config }) {
 					];
 
 					export const routes = [
-						${get_app_routes(manifest_data)
-							.map((route) => s(route))
-							.join(',\n')}
+						${manifest_data.routes.map((route) => s({ id: route.id })).join(',\n')}
 					];
 					`;
 				}
@@ -1574,7 +1571,7 @@ function kit({ svelte_config }) {
 			// the client build and after prerendering respectively.
 			replace_manifest_placeholder_variables(server_chunks, `${out}/server`, {
 				assets: manifest_data.assets.map((asset) => ({ path: asset.file })),
-				routes: get_app_routes(manifest_data)
+				routes: manifest_data.routes.map((route) => ({ id: route.id }))
 			});
 
 			const verbose = builder.config.logLevel === 'info';
@@ -1736,7 +1733,7 @@ function kit({ svelte_config }) {
 				replace_manifest_placeholder_variables(client_chunks, `${out}/client`, {
 					immutable,
 					assets: manifest_data.assets.map((asset) => ({ path: asset.file })),
-					routes: get_app_routes(manifest_data)
+					routes: manifest_data.routes.map((route) => ({ id: route.id }))
 				});
 
 				// Now that the client build is done, replace the `build` sentinel
@@ -2148,11 +2145,7 @@ const create_manifest_data_module = (is_build, manifest_data) => {
 	// In dev, `manifest_data` may not be set yet on the very first load,
 	// but `configureServer` (which calls `sync.create`) runs before any
 	// module is served, so it will be set by the time this is called.
-	const routes = manifest_data
-		? get_app_routes(manifest_data)
-				.map((route) => s(route))
-				.join(',\n')
-		: '';
+	const routes = manifest_data?.routes.map((route) => s({ id: route.id })).join(',\n') ?? '';
 	const assets = manifest_data?.assets.map((asset) => s({ path: asset.file })).join(',\n') ?? '';
 
 	return dedent`
diff --git a/packages/kit/test/apps/basics/test/test.js b/packages/kit/test/apps/basics/test/test.js
index 2202bbcb77c1..908e760ca214 100644
--- a/packages/kit/test/apps/basics/test/test.js
+++ b/packages/kit/test/apps/basics/test/test.js
@@ -782,8 +782,6 @@ test.describe('$app/manifest', () => {
 		expect(ids).toContain('/');
 		expect(ids).toContain('/app-manifest');
 		expect(ids).toContain('/routing');
-		// `/accessibility` only holds a layout and child routes, so it isn't a route itself
-		expect(ids).not.toContain('/accessibility');
 	});
 
 	test('exposes static assets', async ({ page }) => {

From 32d0ecef4d413acad0799757dd9aca89f2854517 Mon Sep 17 00:00:00 2001
From: Nic Polumeyv <162764842+Nic-Polumeyv@users.noreply.github.com>
Date: Thu, 30 Jul 2026 14:16:39 -0400
Subject: [PATCH 3/5] generate RouteId in a single pass

---
 .../src/core/sync/create_manifest_data/index.js   |  8 --------
 packages/kit/src/core/sync/write_app_types.js     | 15 +++++++++------
 2 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/packages/kit/src/core/sync/create_manifest_data/index.js b/packages/kit/src/core/sync/create_manifest_data/index.js
index c4b76d5e5d85..93f4a26c5138 100644
--- a/packages/kit/src/core/sync/create_manifest_data/index.js
+++ b/packages/kit/src/core/sync/create_manifest_data/index.js
@@ -51,14 +51,6 @@ export function is_app_route(route) {
 	return !!(route.page || route.endpoint);
 }
 
-/**
- * Returns the routes that `$app/manifest` exposes and that `RouteId` is generated from.
- * @param {import('types').ManifestData} manifest_data
- */
-export function get_app_routes(manifest_data) {
-	return manifest_data.routes.filter(is_app_route).map((route) => ({ id: route.id }));
-}
-
 /**
  * Returns a list of files in the `static` directory.
  * @param {import('types').ValidatedConfig} config
diff --git a/packages/kit/src/core/sync/write_app_types.js b/packages/kit/src/core/sync/write_app_types.js
index 1ee63c19d923..81a844220d2a 100644
--- a/packages/kit/src/core/sync/write_app_types.js
+++ b/packages/kit/src/core/sync/write_app_types.js
@@ -5,7 +5,7 @@ import { posixify } from '../../utils/os.js';
 import { write_if_changed } from './utils.js';
 import { s } from '../../utils/misc.js';
 import { get_route_segments } from '../../utils/routing.js';
-import { get_app_routes, is_app_route } from './create_manifest_data/index.js';
+import { is_app_route } from './create_manifest_data/index.js';
 
 const replace_optional_params = (/** @type {string} */ id) =>
 	id.replace(/\/\[\[[^\]]+\]\]/g, '${string}');
@@ -143,6 +143,9 @@ function generate_app_types(manifest_data, config, dir) {
 	/** @type {Set<string>} */
 	const pathnames = new Set();
 
+	/** @type {string[]} */
+	const app_route_ids = [];
+
 	/** @type {string[]} */
 	const dynamic_routes = [];
 
@@ -193,6 +196,10 @@ function generate_app_types(manifest_data, config, dir) {
 	}
 
 	for (const route of manifest_data.routes) {
+		if (is_app_route(route)) {
+			app_route_ids.push(s(route.id));
+		}
+
 		const pathname = remove_group_segments(route.id);
 		let normalized_pathname = pathname.slice(1);
 
@@ -238,11 +245,7 @@ function generate_app_types(manifest_data, config, dir) {
 	return [
 		'declare module "$app/types" {',
 		'\texport interface AppTypes {',
-		`\t\tRouteId(): ${
-			get_app_routes(manifest_data)
-				.map((route) => s(route.id))
-				.join(' | ') || 'never'
-		};`,
+		`\t\tRouteId(): ${app_route_ids.join(' | ') || 'never'};`,
 		`\t\tRouteParams(): {\n\t\t\t${dynamic_routes.join(';\n\t\t\t')}\n\t\t};`,
 		`\t\tLayoutParams(): {\n\t\t\t${layouts.join(';\n\t\t\t')}\n\t\t};`,
 		`\t\tPath(): ${Array.from(pathnames).join(' | ')};`,

From f6d160944668f5b7cd52e666eb86bc1ff7d822da Mon Sep 17 00:00:00 2001
From: Nic Polumeyv <162764842+Nic-Polumeyv@users.noreply.github.com>
Date: Thu, 30 Jul 2026 14:45:44 -0400
Subject: [PATCH 4/5] test that a directory with only a layout is excluded from
 RouteId

---
 .../kit/src/core/sync/write_types/test/app-types/+page.js    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/kit/src/core/sync/write_types/test/app-types/+page.js b/packages/kit/src/core/sync/write_types/test/app-types/+page.js
index 94e128fafbde..ec71ebf72393 100644
--- a/packages/kit/src/core/sync/write_types/test/app-types/+page.js
+++ b/packages/kit/src/core/sync/write_types/test/app-types/+page.js
@@ -10,9 +10,12 @@ id = '/(group)/path-a';
 id = '/nope';
 
 // @ts-expect-error `/foo` is a directory with no `+page` or `+server`, so it is not a route
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 id = '/foo';
 
+// @ts-expect-error a directory with only a `+layout` is not a route
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+id = '/(group)/path-a/trailing-slash/always/layout';
+
 /** @type {import('$app/types').RouteParams<'/foo/[bar]/[baz]'>} */
 const params = {
 	bar: 'A',

From 6c7935d43945939c9862b7d21b7aaccfe00df4e5 Mon Sep 17 00:00:00 2001
From: Nic Polumeyv <162764842+Nic-Polumeyv@users.noreply.github.com>
Date: Thu, 30 Jul 2026 14:54:04 -0400
Subject: [PATCH 5/5] use is_app_route for the $app/manifest routes filter

---
 .changeset/famous-pandas-hammer.md                       | 2 +-
 packages/kit/src/core/sync/create_manifest_data/index.js | 4 +---
 packages/kit/src/exports/vite/index.js                   | 3 ++-
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/.changeset/famous-pandas-hammer.md b/.changeset/famous-pandas-hammer.md
index 6959de0d4be9..0bcfccf2635c 100644
--- a/.changeset/famous-pandas-hammer.md
+++ b/.changeset/famous-pandas-hammer.md
@@ -2,4 +2,4 @@
 '@sveltejs/kit': patch
 ---
 
-fix: remove paths without layout files from `LayoutParams`
+fix: exclude routes without a page or endpoint from `routes` in `$app/manifest`, and remove directories with no route files from `LayoutParams`
diff --git a/packages/kit/src/core/sync/create_manifest_data/index.js b/packages/kit/src/core/sync/create_manifest_data/index.js
index 42d46bd35245..2a5782928487 100644
--- a/packages/kit/src/core/sync/create_manifest_data/index.js
+++ b/packages/kit/src/core/sync/create_manifest_data/index.js
@@ -451,9 +451,7 @@ function create_routes_and_nodes(cwd, config, fallback) {
 	}
 
 	// remove route objects with no route file
-	routes = routes.filter(
-		(route) => route.page || route.endpoint || route.leaf || route.layout || route.error
-	);
+	routes = routes.filter((route) => route.endpoint || route.leaf || route.layout || route.error);
 
 	// add parents to error nodes so that we can compute which page options apply to them
 	for (const route of routes) {
diff --git a/packages/kit/src/exports/vite/index.js b/packages/kit/src/exports/vite/index.js
index 2e9d2fc874f7..655843db6996 100644
--- a/packages/kit/src/exports/vite/index.js
+++ b/packages/kit/src/exports/vite/index.js
@@ -41,6 +41,7 @@ import {
 } from './utils.js';
 import { stackless } from '../../utils/error.js';
 import { write_client_manifest } from '../../core/sync/write_client_manifest.js';
+import { is_app_route } from '../../core/sync/create_manifest_data/index.js';
 import prerender from '../../core/postbuild/prerender.js';
 import analyse from '../../core/postbuild/analyse.js';
 import { s } from '../../utils/misc.js';
@@ -2127,7 +2128,7 @@ function stringify_assets(assets) {
 function stringify_routes(routes) {
 	return (
 		routes
-			?.filter((route) => route.page || route.endpoint || route.leaf)
+			?.filter(is_app_route)
 			.map((route) => s({ id: route.id }))
 			.join(',\n') ?? ''
 	);