Produce the copy-paste prompt that starts the next chat. Line one is a short chat name; then the lineage block (the PRD and phase this chat serves, or an honest "no lineage found"); then the skill to use, the goal, where to work, pointers into the governing documents, and the single first action. Before writing the prompt it moves every fact the repo should own out of the prompt and into the governing document, so the prompt stays a pointer. Use whenever the user asks for "a prompt for a new chat", "the prompt to continue this", "hand this off to a fresh session", or when any skill reaches the point of handing work to a fresh chat (phase-split, implement-from-requirements…
