{"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-o5lsb7u9","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24799283 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"33710a3edd8c6048c6cce6d63d771b39837699aab91fea41684dbbcf9ea374c9","version":20},{"created_at":"2026-06-10T13:35:03Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(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":"28ce33e1e9dbd3e17ea98a8853e1fbe67f8c8b7ac5356e339e9f5fcd8c0e4985","version":7},{"created_at":"2026-06-10T13:05:35Z","element_count":84,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"db0d51e4ccd7923e6a66b3e95fab70f8edb77a5fb2fc88b9075a022bf64d9e4f","version":4}]}