{"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-owygbbiv","versions":[{"created_at":"2026-06-13T16:56:27Z","element_count":72,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e17adf7d395800b5bab52795c52c79d7de8fefd06ea09ff352c15d31ff0e9ff1","version":3},{"created_at":"2026-06-13T16:46:07Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f6d11b714c1322acf233634a44d625e9cd70fd76413e1873cc1759c0448dbda5","version":2},{"created_at":"2026-06-13T16:46:06Z","element_count":130,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}