{"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-willowbrookhouse-5i5a7cbk","versions":[{"created_at":"2026-07-07T05:15:59Z","element_count":72,"note":"5軸GA polish 39->90 by M5 (autonomous)","saved_by":"mcp","sha256":"381ada092923fcdd95cd45229e90daef4d02dee898a0e6a1a77cf460b5718491","version":3},{"created_at":"2026-07-07T05:10:07Z","element_count":101,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6ad2406a0b8d605c1809bce8e9d1ec57821271b90c6888d3b8276de710d8e4b3","version":2},{"created_at":"2026-07-07T05:10:07Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}