{"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-navvkvf4","versions":[{"created_at":"2026-06-13T14:48:37Z","element_count":89,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2fa4d458ca27e2455bdd24ed8de9460c6d5d02e6a75e67542ac45b294d9db69e","version":3},{"created_at":"2026-06-13T14:32:05Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2445382549093b52f006c44959f3ace7af0203ea4172054b84b3c3c923939d04","version":2},{"created_at":"2026-06-13T14:32:03Z","element_count":126,"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}]}