{"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-3lbl6q64","versions":[{"created_at":"2026-06-30T06:32:18Z","element_count":82,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"f626568052f431c402a9b7feb8d02a35ea0b7dbcdcdcb532885b67d72fde8a97","version":3},{"created_at":"2026-06-30T06:17:28Z","element_count":86,"note":"loop3: 設計時延床 78.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8f05335c20e78e089134b2ec1e11bcbb4839b73fedb911ca3f647c566550922a","version":2},{"created_at":"2026-06-30T06:17:27Z","element_count":86,"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}]}