{"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-q46mloo9","versions":[{"created_at":"2026-06-13T16:29:27Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d72ab1a1c61aeb5e0d21b196eb198de0bfd98f7826a8219ec005d9bee5ae4df1","version":3},{"created_at":"2026-06-13T16:17:06Z","element_count":130,"note":"loop3: 設計時延床 80.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"29705e3f03a1fdf86199d2a90e4fab27123559d2fd94fb0749fd28b9d08730b7","version":2},{"created_at":"2026-06-13T16:17:02Z","element_count":130,"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}]}