{"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-wychwoodhouse-zq0oqfir","versions":[{"created_at":"2026-06-10T13:11:06Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"9278b4103a7f3b40c9ae3149e62c1ffd12ad70cd9db2d1fff6308a4368b56a25","version":11},{"created_at":"2026-06-10T08:15:27Z","element_count":91,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cec33e8d1186c1f41d801aa4f6242f4b0f384eb9d2bde26471acfac8978052ad","version":2}]}