{"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-3ihuvhbp","versions":[{"created_at":"2026-06-10T22:52:30Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote22820833 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f283fdb812617dcc5f6acc52d9d9c64fae56af0fb92b58286e79f323dbc1b927","version":20},{"created_at":"2026-06-10T13:34:25Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(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":"23247ee7df3269cd38fde9a922802476da9ec64f771184abecd2d5c9a93d9625","version":7},{"created_at":"2026-06-10T12:48:23Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"713bb2d18456c34b6d83b8012927dbab089637dbf40084de2e298d2bf93f45e4","version":4}]}