The numbers are two parts:
The first is the point of view (I write single POV) with every number being a unique character. I'm limited to 9998 unique POVs but I estimate that will take a few decades.
The second is the novel/story count for that POV starting at 0.
*-99 is going to be every story in a given POV with the chapters interspersed chronologically.
9999-00 is going to be EVERY story and chapter in chronological order.
9999-01 is going to be The Machine War. All chapters and stories related to a world war as the age of magic dies and steampunk takes over.