{"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-cedarfieldbungalow-adwli2dg","versions":[{"created_at":"2026-07-28T06:42:02Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9f5aa7b388ef11c3b759bd09d2fe1995749be3112b7e8a355c44c6b9acca7b2b","version":2},{"created_at":"2026-07-28T06:42:02Z","element_count":87,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}