Produce a downstream artifact — executive summary, reader memo, cover note — from a finished dossier. Use to extract the source's spine, build an outline for the new form, compose under heavy voice control (the hole-fill path dominates), and audit; the derived artifact re-asserts the source's hardened claim strengths, marks any new framing as authored, and invents no unsourced claim. For composing a section of the source document itself, use compose-section.
