{"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-x1n15b72","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy80278800→quote20921031 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"53e84f18cc9546f655714d10cb77668df8920fbbc6210de629a2906b2d716538","version":18},{"created_at":"2026-06-10T13:56:56Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"0cdd640b8b7e6353525d5caa57b4c25607bf6df861344f2680ea8bdc94786fd5","version":5},{"created_at":"2026-06-10T13:46:37Z","element_count":54,"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":"073c73d1a1fbeef0e84c39281db33253b37888062392c9c89ec4c46ae602b5b4","version":4}]}