{"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-sunsetridgehouse-qx82ylub","versions":[{"created_at":"2026-06-10T22:52:18Z","element_count":66,"note":"legacy fix: jpy72816480→quote25566701 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4c0d28d2f42c06ae6e4e870b3d650ba0a50aa950695d8658b754ae2c5874321e","version":25},{"created_at":"2026-06-10T13:23:30Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"0663597ee031c4420ceb22402a069e92f1d492d170c89c44675ae6a33a5c7838","version":10},{"created_at":"2026-06-10T10:37:44Z","element_count":84,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"82f76e77b11410bc0b874d1ef1a9bb6e898cafeb8077e4b18dca3a626bd15475","version":2}]}