{"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-theoldmillhouse-t36qou5v","versions":[{"created_at":"2026-07-29T19:34:18Z","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":"bbc7d4dec9570ade6499b40782b9276a48203632ba0d8b9786129d92354ddaf9","version":2},{"created_at":"2026-07-29T19:34:18Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}