STDOUTis a constant although it doesn't have to be
yxhuvud, it would also hugely help to allow these to be any IO, not only FileDescriptor. almost all of the complexity is also due to that.
writecall gets rewritten to a different
writecall and that's it
reopeninto a pipe
<domain>/some/pathand either click on a link or on the "Stop" button near the URL bar while the page is still loading.