{"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-1q9xff5w","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21111977 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"52d9280c93ee4e25658cf81345a428b6a2877babc1d6616a32d746e63f50d188","version":19},{"created_at":"2026-06-10T13:55:11Z","element_count":72,"note":"5軸GA polish 69->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2ff0ae24bfab0b688350c010feec0c915873d852ec53bb647d2c2edd41ee7488","version":6},{"created_at":"2026-06-10T13:45:54Z","element_count":47,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"cf6affae1b667e93d3c9ece450cab5daf9b12ffebca49cbb864ec0d2220f5607","version":5}]}