{"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-annd46qf","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy80278800→quote21131415 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"cdd77496a122d2d42bbc7e58249db20df1fa338c96319164cebc4cfecafc847c","version":23},{"created_at":"2026-06-10T13:30:17Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(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":"a9f4a33b982d25e7fecae7ef8813bad9b914200654878870a3e6f9a7e9178e16","version":9},{"created_at":"2026-06-10T11:43:45Z","element_count":68,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"6c3cdfe106c3943cd9eda9f94d2a144cdb6d99eee0f02c8db85303518920f426","version":4}]}