{"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-eastmanvalehouse-ge35k50l","versions":[{"created_at":"2026-07-26T07:29:05Z","element_count":101,"note":"loop3: 設計時延床 78.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6e7a5b0b454aea08fa4cb68914b28b9c2780772dc5c769e56e10d9e5e1653f1a","version":2},{"created_at":"2026-07-26T07:29:03Z","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}]}