{"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-house-fs887zxo","versions":[{"created_at":"2026-06-12T15:43:03Z","element_count":262,"note":"言葉から生成: 総2階(箱) / 越屋根のある自然素材の家・通風重視 / 越屋根 / 高窓 / 木製格子 / 土間 / 吹抜け","saved_by":"mcp:create","sha256":"","version":1}]}