Index: ChapterX.Domain/Entities/Collaboration.cs
===================================================================
--- ChapterX.Domain/Entities/Collaboration.cs	(revision 877c13c3dd0934c1d31da7988d0d2c2c5925ed55)
+++ ChapterX.Domain/Entities/Collaboration.cs	(revision e882b92860e1899312f197af1134bb0f33d30d15)
@@ -8,4 +8,6 @@
         public int UserId { get; set; }
         public int StoryId { get; set; }
+        public string Role { get; set; } = string.Empty;
+        public int? PermissionLevel { get; set; }
         public DateTime CreatedAt { get; set; }
         public User User { get; set; } = null!;