What to send in the remote protocol for a breakpoint?

[Lee Merrill]

I'm writing a remote protocol monitor, and I'm not sure what to send
to gdb when a breakpoint is encountered. If I send "S00" it says
"Program received signal 0, Signal 0," which is a bit confusing to the
user. But the only other option (the 'T' response) also has a signal
number.

So how can I send a response that just says "the program stopped"?

Any thoughts would be appreciated,
Lee