{"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-willowbrookhouse-1rhn1da2","versions":[{"created_at":"2026-07-28T06:37:01Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"eab3a8bfe11efa2cb2932cac0597d3d585aa7726c5304735c872bfe2bf387b65","version":2},{"created_at":"2026-07-28T06:37:01Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}