backlog-refine

Shape a Work/Backlog item together with the user over a long sitting until it is ready to be worked — the user writes the human parts (Summary, Motivation, Acceptance criteria, any detail they care about) in their editor, while the LLM researches the code and wiki, writes the Technical details, keeps a list of open questions, and proposes the tasks and their routing. Ends with a readiness check and, on the user's word, the move to Work/Ready/ where /backlog-run-scheduled may pick it up. Use for: "refine X", "let's work on the backlog", "shape this item", "backlog refinement", "get X ready", or the /backlog-refine command. Not for executing tasks (backlog-run) or filing a quick new item (backlog-add).