{"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-ns774ryu","versions":[{"created_at":"2026-07-06T01:31:00Z","element_count":221,"note":"言葉から生成: 中庭ロの字 / 越屋根のある自然素材の家・通風重視 / 越屋根 / 中庭 / 土間 / 高窓 / 換気扇","saved_by":"mcp:create","sha256":"","version":1}]}