{"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-wisewoodhouse-xvs1h47p","versions":[{"created_at":"2026-08-04T10:11:34Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"01e79348b5935d8caf274245002fcf8bfc7c5873655df12da678130f793bd098","version":2},{"created_at":"2026-08-04T10:11:34Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}