{"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-k3dgrz8n","versions":[{"created_at":"2026-06-10T22:52:30Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21039553 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b6adbfae964f090aabd4aa94d4783423810fb6a237a23a24fa315a41427fa2f0","version":20},{"created_at":"2026-06-10T13:34:31Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(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":"36e68d6f412e75e3535e685c12350bd3c4996437f0fb0bacecb612b8c4ef8856","version":7},{"created_at":"2026-06-10T12:48:56Z","element_count":84,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b97bdcc0900f91f2a3537acb4ba7487f0502189dfd66466349dcbad5d82b3e60","version":4}]}