{"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-6bz4hf8o","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73855110→quote20705718 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1278975bb19d13e6511e910f5dc0f14e88d36d416daa69cc9bb71c140f8143ab","version":18},{"created_at":"2026-06-10T14:13:28Z","element_count":90,"note":"5軸GA polish 66->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3b51abac68fcc70ed0645e526602c56d67a28aa05ff9aa4b7f22c8926baa9a18","version":7},{"created_at":"2026-06-10T13:47:46Z","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":"29b4f2f2a3e21f436a19e5900002e9ddf83d51a5460edccb1cc6d7f18a2675de","version":4}]}