DARPA’s spacecraft became the x-37B, which probably has fuck-with-satellites capability via robot arm but a rather paltry 4 ft by 7 ft payload bay (The shuttle had 15 ft by 60 ft !)
IIRC there's a scaling limit with modern military/spy satellites on two axes: radar cross section and thermal output both grow with volume and make the satellite easier to target in a real conflict (which is ostensibly what many of them are for). The big ones like the satellite NRO donated to NASA with the 2.4 m diameter mirrors are easy to disable and AFAIK there's not much point recovering them anyway. The ones used for telecom with recoverable military encryption keys tend to be much smaller. For example, the 2nd gen Iridium constellation satellites are 30x40x70 cm.