{"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-sq8eyscd","versions":[{"created_at":"2026-08-14T20:57:16Z","element_count":128,"note":"言葉から生成: 中庭ロの字 / 茶室と縁側のある和の住まい / 庇付き縁側 / 離れ茶室 / 吹抜 / 高窓 / 庇","saved_by":"mcp:create","sha256":"","version":1}]}