{"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-d7a1o52u","versions":[{"created_at":"2026-06-10T22:52:33Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote21245272 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3a9dc33d622bd15b2a99fa82152645d38157d273f765340663264288e723a645","version":20},{"created_at":"2026-06-10T13:44:14Z","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":"11fce66ac776e5d57aa88f75f17df534382494105c29250dbba0496941c1e1c1","version":7},{"created_at":"2026-06-10T13:22:15Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"b8f396a016bf79932acefdebdb30f21ed447e0d83e31db5f49063e5a50c1888a","version":4}]}