Here is the last photo agg diff, based on bird 1.6.3.
protocol aggregator agg1 {
type bgp as 65000;
route 198.51.100.0/24;
route 192.168.0.0/23 { min count 1; filter f_agg; };
route 192.168.128.0/23 { filter f_agg2; min filter count 2; };
}
protocol aggregator agg2 {
type static;
route 192.168.2.0/24 { min count 3; }
}