fix: restore prebuilt rn core

Author: hurali97

packages/cli/src/brownfield/utils/supportsPrebuiltRNCore.ts

@@ -1,10 +1,13 @@
 import { getReactNativeVersion, versionCompare } from '@rock-js/tools';
+import { getExpoSdkMajor, isExpoProject } from './project.js';
 
 /** Minimum RN version that can opt in to prebuilts via `--use-prebuilt-rn-core`. */
 export const MIN_REACT_NATIVE_VERSION_FOR_OPT_IN_PREBUILT_RN_CORE = '0.81.0';
 /** Minimum RN version where Brownfield enables prebuilts by default (vanilla projects). */
 export const MIN_REACT_NATIVE_VERSION_FOR_PREBUILT_RN_CORE_BY_DEFAULT =
   '0.84.0';
+export const MIN_EXPO_SDK_MAJOR_FOR_PREBUILT_RN_CORE_BY_DEFAULT = 55;
+
 export type PrebuiltRNCoreSupportResult =
   | { supported: true; enabledByDefault: boolean; reason?: never }
   | { supported: false; enabledByDefault?: never; reason: string };
@@ -36,6 +39,23 @@ export function supportsPrebuiltRNCore({
     };
   }
 
+  if (isExpoProject(projectRoot)) {
+    const expoSdkMajor = getExpoSdkMajor(projectRoot);
+
+    if (
+      expoSdkMajor === null ||
+      expoSdkMajor < MIN_EXPO_SDK_MAJOR_FOR_PREBUILT_RN_CORE_BY_DEFAULT
+    ) {
+      const sdkLabel = expoSdkMajor === null ? 'unknown' : String(expoSdkMajor);
+      return {
+        supported: false,
+        reason: `--use-prebuilt-rn-core is unsupported in Expo SDK ${sdkLabel}: packaging brownfield with prebuilts requires Expo SDK ${MIN_EXPO_SDK_MAJOR_FOR_PREBUILT_RN_CORE_BY_DEFAULT} or newer.`,
+      };
+    }
+
+    return { supported: true, enabledByDefault: true };
+  }
+
   const enabledByDefault =
     versionCompare(
       reactNativeVersion,