{"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-11kc56jf","versions":[{"created_at":"2026-06-10T22:52:01Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20782405 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b26ff7e077c7fed3df1429be8dd1bb5228a17c27aaba432c19fe20298c9b0087","version":26},{"created_at":"2026-06-10T13:10:28Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"16958545b44ff36090385d755b100a5b3a75b5c0c420f6ea44ed883828430dd3","version":11},{"created_at":"2026-06-10T08:15:09Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3976441a0a30c3b13f62cd01e4d8b0ac2ece1248924327f454a73df3123275d1","version":2}]}