{"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-surbitonlodgehouse-gw3tmmvy","versions":[{"created_at":"2026-08-14T23:10:34Z","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":"ae568a4f36d515ef4c58c1a8b0a54a78816bb958c6613f5bc004ed240f38ee16","version":2},{"created_at":"2026-08-14T23:10:33Z","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}]}