{"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-vbf3mx51","versions":[{"created_at":"2026-07-24T06:11:18Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"41317dd518320a5b7fab2d6429fd610f224e1d3cb1ec30d7909265c0c3f096a8","version":2},{"created_at":"2026-07-24T06:11:17Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}