From 11e4a2166810345e0347f6b7803b90111378fa24 Mon Sep 17 00:00:00 2001
From: Tim Dorr <git@timdorr.com>
Date: Wed, 11 Jun 2025 16:16:44 +0000
Subject: [PATCH 1/2] fix: Add validation for a route's id not being 'root'

---
 .../__tests__/route-config-test.ts                | 15 +++++++++++++++
 packages/react-router-dev/config/routes.ts        |  7 ++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/packages/react-router-dev/__tests__/route-config-test.ts b/packages/react-router-dev/__tests__/route-config-test.ts
index 0fc700d7fa..de788448ac 100644
--- a/packages/react-router-dev/__tests__/route-config-test.ts
+++ b/packages/react-router-dev/__tests__/route-config-test.ts
@@ -76,6 +76,21 @@ describe("route config", () => {
       `);
     });
 
+    it("is invalid it uses the 'root' id", () => {
+      let result = validateRouteConfig({
+        routeConfigFile: "routes.ts",
+        routeConfig: [route("/", "root.tsx", { id: "root" })],
+      });
+
+      expect(result.valid).toBe(false);
+      expect(!result.valid && result.message).toMatchInlineSnapshot(`
+        "Route config in "routes.ts" is invalid.
+
+        Path: routes.0.id
+        A route cannot use the reserved id 'root'."
+      `);
+    });
+
     it("is invalid when property is wrong type", () => {
       let result = validateRouteConfig({
         routeConfigFile: "routes.ts",
diff --git a/packages/react-router-dev/config/routes.ts b/packages/react-router-dev/config/routes.ts
index ef384788e6..03a2a4d898 100644
--- a/packages/react-router-dev/config/routes.ts
+++ b/packages/react-router-dev/config/routes.ts
@@ -112,7 +112,12 @@ export const routeConfigEntrySchema: v.BaseSchema<
     );
   }, "Invalid type: Expected object but received a promise. Did you forget to await?"),
   v.object({
-    id: v.optional(v.string()),
+    id: v.optional(
+      v.pipe(
+        v.string(),
+        v.notValue("root", "A route cannot use the reserved id 'root'.")
+      )
+    ),
     path: v.optional(v.string()),
     index: v.optional(v.boolean()),
     caseSensitive: v.optional(v.boolean()),

From cc297a59618c0c9ec5abe1a7b3dd6cd5a1c3e70a Mon Sep 17 00:00:00 2001
From: Tim Dorr <git@timdorr.com>
Date: Wed, 11 Jun 2025 16:19:11 +0000
Subject: [PATCH 2/2] Add a changeset

---
 .changeset/tender-snails-attack.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/tender-snails-attack.md

diff --git a/.changeset/tender-snails-attack.md b/.changeset/tender-snails-attack.md
new file mode 100644
index 0000000000..c1f9d8f756
--- /dev/null
+++ b/.changeset/tender-snails-attack.md
@@ -0,0 +1,5 @@
+---
+"@react-router/dev": patch
+---
+
+Add validation for a route's id not being 'root'