{"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-iwlsr6gz","versions":[{"created_at":"2026-07-15T02:09:18Z","element_count":84,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"5ceba88e459ce797af620fd5c60c9cb9ff6415fb69138043dd1498b425bb6f5c","version":3},{"created_at":"2026-07-15T02:01:50Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"820fb09ac48cd00eb420f4ef13309c45ee23e461139ef07481ef397c57a90015","version":2},{"created_at":"2026-07-15T02:01:50Z","element_count":119,"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}]}