{"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-4408fc63","versions":[{"created_at":"2026-06-10T22:50:05Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20900356 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f387d3f0e3dc6159a85b1bbc9e90692d664b6374cf7bd3fd2ffc560a9897bb28","version":25},{"created_at":"2026-06-10T13:07:51Z","element_count":63,"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":"1d8377a3a92fb226e802d9ad2880eec12fab864068c78e21241278d048be1ed1","version":11},{"created_at":"2026-06-10T07:25:59Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"792cec306a7ce30a216d191f441b86931c4403bdcc23313abad14d7e1fb0aed6","version":2}]}