{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-cskm6ap5","versions":[{"created_at":"2026-07-17T19:41:04Z","element_count":71,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"82bac07ec8e0508cf8896e4bcfef66892a3fd5a040eeff9f18d5bc79207a9a7b","version":3},{"created_at":"2026-07-17T19:26:24Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"388f9916f1762439dbd56b4dab8b665efd287f566b7f68870945ef6136077a81","version":2},{"created_at":"2026-07-17T19:26:23Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}