{"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-0qsfp3s9","versions":[{"created_at":"2026-06-10T22:52:33Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20933393 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"66c7145d5221e238c74751c5e1437ffacd0f34574f5d4204f2a54404ffead4d8","version":20},{"created_at":"2026-06-10T13:44:19Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"85e41d94e4bdc45c94bc47a82d19eedd86cbbfe149694970875dc703e3d09d1d","version":7},{"created_at":"2026-06-10T13:21:53Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"1804cc51cea43a75c7c25cb1de2f0f3eadb9c4f86812ee9138c1b2293538ab47","version":4}]}