{"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-u08sxss3","versions":[{"created_at":"2026-06-26T06:53:09Z","element_count":84,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b4e5d01d4c2d0602267cf0484504ab3681805ec935de09fd0c70c0f58f2708f1","version":3},{"created_at":"2026-06-26T06:44:35Z","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":"2026-06-26T06:44:35Z","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}]}