{"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-j5ydtsyx","versions":[{"created_at":"2026-06-10T13:14:29Z","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":10},{"created_at":"2026-06-10T09:21:33Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"7e1dd0530222acc28539966922977c97b484d74776b18ac9e2fa9ed4cd1db81f","version":2}]}