From 69e5cf7ecbea818d05de48d643d1ef00a6b0f789 Mon Sep 17 00:00:00 2001
From: Mehrshad <code.rezaei@gmail.com>
Date: Wed, 26 Aug 2026 07:38:12 +0330
Subject: [PATCH 1/2] test: lazy-ref src values must serialize with forward
 slashes

On Windows OS, node:path relative() returns backslashed src values
in serialized lazy refs. Vite client-manifest keys are always posix,
so they never match: SSR hydration preloads silently miss and SolidJS
server lazy() breaks. The test fails on Windows today and pins the
invariant before the fix lands.
---
 test/vite.spec.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/vite.spec.ts b/test/vite.spec.ts
index d0af478..299a704 100644
--- a/test/vite.spec.ts
+++ b/test/vite.spec.ts
@@ -85,6 +85,20 @@ describe("fileRoutes vite plugin", () => {
     expect(code.match(/pick=default&pick=\$css&lang\.tsx'\)/g)?.length).toBe(2);
   });
 
+  it("serializes lazy-ref src values with forward slashes", async () => {
+    const directory = createRouteTree({
+      "index.tsx": "export default () => <h1>Home</h1>;"
+    });
+
+    const split = await loadVirtualModule(directory);
+    const eager = await loadWith(createPlugin(directory, { codeSplitting: false }), directory);
+
+    expect(split).toContain('"src"');
+    expect(eager).toContain('"src"');
+    expect(split).not.toContain("\\");
+    expect(eager).not.toContain("\\");
+  });
+
   it("resolves only the virtual module id", async () => {
     const [plugin] = fileRoutes() as any[];
     expect(moduleId).toBe("virtual:file-routes");

From 745ffdf776dd3a63773f4a073cc48e24b091b8f7 Mon Sep 17 00:00:00 2001
From: Mehrshad <code.rezaei@gmail.com>
Date: Wed, 26 Aug 2026 07:53:17 +0330
Subject: [PATCH 2/2] fix: normalize lazy-ref src values to posix separators
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

node:path relative() emits Windows separators, which never match
Vite's always-posix client-manifest keys — SSR hydration preloads
miss and server lazy() breaks. Every other path in the pipeline is
already normalized through normalizePath(); these two sites were the
only ones missed. Turns the regression test from the previous commit
green on Windows.
---
 src/vite/index.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vite/index.ts b/src/vite/index.ts
index 4279b50..3bc19fa 100644
--- a/src/vite/index.ts
+++ b/src/vite/index.ts
@@ -319,12 +319,12 @@ export function fileRoutes(options: FileRoutesOptions = {}): PluginOption[] {
               // plus the `src` lazy refs already expose.
               if (!codeSplitting) {
                 return {
-                  src: relative(root, buildId),
+                  src: normalizePath(relative(root, buildId)),
                   require: `_$() => (${js.addNamespaceImport(buildId)})$_`
                 };
               }
               return {
-                src: relative(root, buildId),
+                src: normalizePath(relative(root, buildId)),
                 build: isBuild ? `_$() => import('${buildId}')$_` : undefined,
                 import: `_$() => import('${buildId}')$_`
               };