{"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-w765pq6n","versions":[{"created_at":"2026-06-10T22:50:09Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81611913→quote21774821 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bb5bc95f9546198cd07ee3189c23bd9d1f3a26bbb3cfa06eba6674390ce5316a","version":25},{"created_at":"2026-06-10T13:08:21Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"dd7c22a140ad085b2aa18e09b19700caa2701dac2b56882e3b0b9438c34d1e78","version":11},{"created_at":"2026-06-10T07:41:51Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"39625b8f62f6a4ad31dadee8b44d56dde29890d2fd22bcdb3fbbea18999c8864","version":2}]}