{"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-ev26ffa2","versions":[{"created_at":"2026-07-24T06:17:34Z","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":"62abbd3400c0c61ae689a69386bdc83a61bc3f6db7d4e9e847f58c03098b6b63","version":2},{"created_at":"2026-07-24T06:17:30Z","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}]}