{"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-a39ahlwi","versions":[{"created_at":"2026-07-19T17:51:46Z","element_count":73,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"68ec0ee6d02552b18429caa5499643d93af65b062f2f1551537aee4ce6edb21b","version":3},{"created_at":"2026-07-19T17:37:07Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"08c33386f21eb6f67be3a1888c84264b165e38fcab9c08a4f226f49783bb6acb","version":2},{"created_at":"2026-07-19T17:37:07Z","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}]}