Paul Reiners;

Is it possible to determine when a child shred has finished executing
if you have a reference to the child shred?

I'd say so, let me quote from the "VERSIONS" file from the latest release;

- (added) int Shred.done() // is the shred done?
int Shred.running() // is the shred running?

I'm not 100% sure what "running" is supposed to refer to (perhaps I misunderstand it?) but "done" seems to suit your needs;

================== 8<================
fun void foo()
    {
    second => now;
    }

spork ~ foo() @=> Shred bar;

<<<bar.done()>>>;
<<<bar.running()>>>; // why is this 0? Bug?
2::second => now;
<<<bar.done()>>>;
<<<bar.running()>>>;
==========8<======================

Please note that calling these on a Shred object with no shred process attached to it will return more or less random numbers which is probably a bug.

Yours,
Kas.