{"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-7m3j5x1y","versions":[{"created_at":"2026-06-10T22:50:38Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20168591 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"dc1873bd0b38eb768b62f10b21f292da9901e21572271b30fa9895f33677b3e1","version":25},{"created_at":"2026-06-10T13:08:57Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"ecb25cf1e0d34bf9098174b3f64aa347a840e591701f51ec17c38517f99508f2","version":11},{"created_at":"2026-06-10T07:41:56Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"98728276e0137a7b54565bbfbfef4bc8624da414fee76e4f39ebc2f2fd1ddfc0","version":2}]}