{"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-o64s768n","versions":[{"created_at":"2026-06-10T22:52:47Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81784771→quote21306726 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0642cdf5e698ece885b7df5088c463131ac17ee1d3bf8e31a9af37d1579854ec","version":11},{"created_at":"2026-06-10T16:08:46Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f6f01b52e5bd69651d9d3152633c6bd6c691994d21267f200c77cde56b386857","version":3}]}