tools/system_link_bots.py joins a native-build host with many lightweight
machines, each with one player, speaking the system link protocol directly:
join, settings (reassembling the fragmented record), player, map precached,
loaded, then a UDP input message each tick that acknowledges the host's
updates, as a real client keeps a lockstep game running. Each machine binds
its own loopback address (127.0.0.2 and up), since the host tells machines
apart by address.
python tools/system_link_bots.py --machines 127 --start
fills a 128-machine session on the host at 127.0.0.1 and starts it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>