{"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-c264ogfo","versions":[{"created_at":"2026-07-13T10:23:54Z","element_count":68,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"10a05c63f5b99ce530769d5afd00d29fececed8d87dbdad6cd32ad6b3f10ddf6","version":3},{"created_at":"2026-07-13T10:14:47Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"91a94557346c6af0979bfc048d89e198698bc7c568f6b68d0a23a1aec6325c37","version":2},{"created_at":"2026-07-13T10:14:47Z","element_count":101,"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}]}