{"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-harrowhillhouse-kqighwyo","versions":[{"created_at":"2026-07-22T04:07:56Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"68a8df2a18477703f3839e7dc0f76cbc1f64fb4493be086517139ae7100185d3","version":2},{"created_at":"2026-07-22T04:07:56Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}