{"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-whitehartviewhouse-7qkeraea","versions":[{"created_at":"2026-07-31T04:25:23Z","element_count":82,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"82e4919de1251d9c96fa56e777a0f86358b16f83ca4af4bc70383d8f2c641403","version":2},{"created_at":"2026-07-31T04:25:23Z","element_count":82,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}