{"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-mfvkp6mn","versions":[{"created_at":"2026-06-10T22:52:30Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy70239456→quote23542105 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f6caff4c03063ec46caab8f565c144700dcf44fde3c50f7613783a411b332938","version":20},{"created_at":"2026-06-10T13:34:26Z","element_count":65,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(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":"d056835a8b00d4d2d07cf17bc97e10295bd3c33a8cb260213eda5b606e69a779","version":7},{"created_at":"2026-06-10T12:48:17Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b9d3cb3a372748879736447cd40b226031da3632b7032d38ca4ff9d22884478a","version":4}]}