{"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-c1zmo2tz","versions":[{"created_at":"2026-06-10T22:52:26Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20898438 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6688028e4ca8ab21231bc65bee05df89469764706de014e599f33653efe56aab","version":22},{"created_at":"2026-06-10T13:31:25Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(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":"27d5c39f29d8a21c254858222794a6bfde74b5537f842d04d6d555940fe60695","version":8},{"created_at":"2026-06-10T12:00:00Z","element_count":89,"note":"5軸GA polish 40->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4c781004e5be3cce45daa2dc0af95400678d5842773c7d6ade9806851efeb246","version":3}]}