{"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-u5rhsdjv","versions":[{"created_at":"2026-07-05T17:59:20Z","element_count":85,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6fa8cd38b93e5f825f49017486e47e427be95a39ebb2b4dd6c811faa93586956","version":3},{"created_at":"2026-07-05T17:51:18Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b21d30fe1e97aee733046949252e6406049f275fceea9680cc995b6e916a3b9f","version":2},{"created_at":"2026-07-05T17:51:18Z","element_count":90,"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}]}