From c1f331299d895b573517d9a2a9ef17a316033269 Mon Sep 17 00:00:00 2001
From: Tommy Nguyen <4123478+tido64@users.noreply.github.com>
Date: Mon, 19 Oct 2026 15:28:46 +0200
Subject: [PATCH] fix(windows): warn if `--use-fabric` is used with 0.82+

---
 packages/app/windows/project.mjs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/app/windows/project.mjs b/packages/app/windows/project.mjs
index 3a74caf06..725b88e83 100644
--- a/packages/app/windows/project.mjs
+++ b/packages/app/windows/project.mjs
@@ -486,7 +486,15 @@ export async function projectInfo(
   const version = getPackageVersion("react-native-windows", rnWindowsPath, fs);
   const versionNumber = toVersionNumber(version);
   const manifestFilePath = findNearest("app.json", destPath, fs);
-  const useFabric = options.useFabric ?? versionNumber >= v(0, 80, 0);
+  const newArchOnly = versionNumber >= v(0, 82, 0);
+  const useFabric =
+    newArchOnly || (options.useFabric ?? versionNumber >= v(0, 80, 0));
+
+  if (newArchOnly && typeof options.useFabric === "boolean") {
+    warn(
+      `'--use-fabric' is ignored; react-native-windows ${version} only supports New Architecture`
+    );
+  }
 
   return {
     version,