{"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-pv-j73ydu72","versions":[{"created_at":"2026-06-15T04:22:42Z","element_count":136,"note":"言葉から生成: 平屋(矩形) / 雨水利用とPVのオフグリッド志向・平屋 / 南面巨大庇 / 屋根全面PV / 敷地内雨水調整池 / 南面吹抜け / 高気密高断熱","saved_by":"mcp:create","sha256":"","version":1}]}