A new chat is a blank room
Every conversation with ChatGPT works from what it can see inside that conversation. Start a new one and it sees nothing of the old one — not your characters, not your plot, not the three chapters you were proud of. This is not the model being forgetful; it is the boundary of what a chat is. The old conversation is a transcript you can reopen, but the new one begins in an empty room.
The instinct is to fix this by pasting everything — all your chapters, all your notes — into the new chat. That mostly backfires. A wall of pasted text buries the one thing the assistant actually needs to move: a clear statement of where the book is and what comes next. The skill is not pasting more; it is pasting the right, compact state.