How I normally do #async external programs in my #commonLisp image #embeddableCommonLisp and #uiop (in the notes).
Originally I was writing Kittenette (Closette but for kittens) today, but I ended up wanting to individually treat external processes, especially from #ecl on its own first.
My example is particularly using #cat(1) as an external-process in-memory echo server.
Hope it helps someone. #programming #example
Yes "multi-processing" in the url is ~erroneous.