{"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-v2wxithp","versions":[{"created_at":"2026-06-10T13:12:31Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(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":"157dc205a170e584d5e493420dc8772795e056267a0655a850828ad676647de6","version":11},{"created_at":"2026-06-10T08:48:45Z","element_count":90,"note":"5軸GA polish 55->98 by M5 (autonomous)","saved_by":"mcp","sha256":"dc53d5d38a815d23f5ee3258d9fa42f53c6c6b894e9d65663a70bfce63bd3369","version":3}]}