From d9d8b8ebfdb987fb1713b09e18dd7da68562696d Mon Sep 17 00:00:00 2001
From: Sebastian <asamk@gmx.de>
Date: Sun, 23 Nov 2025 13:03:24 +0100
Subject: [PATCH 1/2] Improve AgnosticBaseRouteObject type for projects using
 exactOptionalPropertyTypes

Projects that use typescript with the exactOptionalPropertyTypes=true
setting see a type error when using react-router.
The workaround of using skipLibCheck=false is not desirable as it
weakens type-system accuracy for the whole project.
https://www.typescriptlang.org/tsconfig/#skipLibCheck

Fixes #10392
Fixes #11991
Fixes #14504
---
 packages/react-router/lib/router/utils.ts | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/packages/react-router/lib/router/utils.ts b/packages/react-router/lib/router/utils.ts
index b670d47781..d682fcf1aa 100644
--- a/packages/react-router/lib/router/utils.ts
+++ b/packages/react-router/lib/router/utils.ts
@@ -628,14 +628,14 @@ export type LazyRouteDefinition<R extends AgnosticRouteObject> =
  * Base RouteObject with common props shared by all types of routes
  */
 type AgnosticBaseRouteObject = {
-  caseSensitive?: boolean;
-  path?: string;
-  id?: string;
-  middleware?: MiddlewareFunction[];
-  loader?: LoaderFunction | boolean;
-  action?: ActionFunction | boolean;
-  hasErrorBoundary?: boolean;
-  shouldRevalidate?: ShouldRevalidateFunction;
+  caseSensitive?: boolean | undefined;
+  path?: string | undefined;
+  id?: string | undefined;
+  middleware?: MiddlewareFunction[] | undefined;
+  loader?: LoaderFunction | boolean | undefined;
+  action?: ActionFunction | boolean | undefined;
+  hasErrorBoundary?: boolean | undefined;
+  shouldRevalidate?: ShouldRevalidateFunction | undefined;
   handle?: any;
   lazy?: LazyRouteDefinition<AgnosticBaseRouteObject>;
 };

From 344cf496a219c2073a2a066d6abb5e4b7f5993f2 Mon Sep 17 00:00:00 2001
From: Sebastian <asamk@gmx.de>
Date: Sun, 23 Nov 2025 13:14:22 +0100
Subject: [PATCH 2/2] Sign CLA

---
 contributors.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/contributors.yml b/contributors.yml
index b1cefda8b7..08a1f590ee 100644
--- a/contributors.yml
+++ b/contributors.yml
@@ -39,6 +39,7 @@
 - arnassavickas
 - aroyan
 - Artur-
+- AsamK
 - ashusnapx
 - avipatel97
 - awreese