{"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-3rpkw5yy","versions":[{"created_at":"2026-06-10T22:49:42Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→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":"b0ffc5a766148d9f9812ff3f3e634204496d0f119d688fd1a24fda0f549ca87c","version":25},{"created_at":"2026-06-10T13:07:47Z","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":11},{"created_at":"2026-06-10T07:25:41Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b47224fc50ebffbc429b6bcfc88475959979dc745829ca7ea2ca85c9c4f94df0","version":2}]}