Agent Skills: polish

Use when a draft's parts are all written but the seams between them are abrupt — smooths the transitions between sections so the piece reads as one continuous argument, not a stack of blocks. Owns the connective craft: handing momentum from one section to the next (problem→agitate→solve, story→lesson→call-to-action, feature→benefit→proof). TRIGGER when a draft is structurally complete and has cleared the strategy gate, and the sections need bridging. DO NOT TRIGGER for writing new copy from a brief (copywriting), running ship-gate checks (editing), or fixing a single line's clarity (that's the line check).