{"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-pd1resq7","versions":[{"created_at":"2026-06-10T13:19:22Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"847b1331e0453538f253e340c3db057855f5639102cf0e5794bf300206909037","version":10},{"created_at":"2026-06-10T10:09:55Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"7e6c0a885eb6c09f9de298bfb8b90ae0891bbbb5af2ae120327a39680ca94176","version":2}]}