{"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-jpcux7lf","versions":[{"created_at":"2026-06-10T23:00:50Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75991608→quote24212747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bcc8e7ab2bc7e009dc96c4fb8b1f0677b310dfae7b8bc23b73a8c68f7cdbd552","version":9},{"created_at":"2026-06-10T21:44:04Z","element_count":90,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"dd6cf3c477b435030c73ede599f402e163b95d7b932810502123f42a6d774639","version":3}]}