{"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-ykecw3m0","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75991608→quote25257164 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ed4016ff8e178cda8f508d92917ec0ea43542edceca558ca1f432d61b53bce5c","version":23},{"created_at":"2026-06-10T13:30:32Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(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":"83c6ed2c655876fb95912b8f399c41c3fd08695e7c1136e3e8f38f85b0dda2fa","version":9},{"created_at":"2026-06-10T11:43:57Z","element_count":90,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"385e30e805cc9c6d4f713cec8d824937a6051cb259abfd204bef7b5f83d9d738","version":4}]}