{"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-wxsmlpyt","versions":[{"created_at":"2026-06-10T22:52:29Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote18993811 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f90699425343a869ba726a37dd31ae8804f2275e47d46c8ccaa4f40f4fd89b27","version":21},{"created_at":"2026-06-10T13:34:18Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"458f4e9196896f74f83211f96df8ef8438ef7f7ddaf4da0289dfd2714d9e6054","version":8},{"created_at":"2026-06-10T12:31:47Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8686676f13b39ef56b137a2938787074afdd08f73be3c5194c84062f48529c91","version":4}]}