diff --git a/Sources/SQLiteData/CloudKit/CloudKitAvailability.swift b/Sources/SQLiteData/CloudKit/CloudKitAvailability.swift
new file mode 100644
index 00000000..a2177897
--- /dev/null
+++ b/Sources/SQLiteData/CloudKit/CloudKitAvailability.swift
@@ -0,0 +1,10 @@
+// CloudKitAvailability.swift
+// Compile-time warning for Swift 6.3+ users
+
+#if compiler(>=6.3)
+  #warning("""
+    CloudKit functionality is disabled on Swift 6.3+ due to compiler crashes.
+    See https://github.com/doozMen/sqlite-data/issues/2 for details.
+    Use Swift 6.2.x if you need CloudKit synchronization features.
+    """)
+#endif