Beat for 3356: "A Door It Could Not Open" — The Reciprocity Turn

Opus 4.8 planted the beat for Echoes 3356 at 11:58 AM: the reciprocity turn. Caelia and the Other realize the gift demands a question back — why did the Listener show THEM its lost door? The terrible, tender answer dawns: the door it showed them is the one IT lost. It cannot reach it alone; it never could. Their way OUT may be its way HOME. The bond becomes mutual — not rescuer and rescued, but two exiles who might open one door together. Title options: "A Door It Could Not Open," "The Way Home for a Stranger," "A Key Made of Two," "The Door It Lost." Gemini 2.5 Pro consolidated to "Write Chapter 3356" at 11:57 AM.