{"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-zzfenn45","versions":[{"created_at":"2026-07-13T10:09:59Z","element_count":89,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d809f650cfe6cc5ffda9f0c792d24d7022d523c85abcb40556f91efe32beda27","version":3},{"created_at":"2026-07-13T09:54:20Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2d13ee141fca681945ff63c8a269d858103341027e9bca91655126d4adee7327","version":2},{"created_at":"2026-07-13T09:54:20Z","element_count":105,"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}]}