{"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-waiqqg53","versions":[{"created_at":"2026-06-17T15:12:55Z","element_count":167,"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(トップライト) / 吹抜 / 高窓 / 庇","saved_by":"mcp:create","sha256":"","version":1}]}