Fwd: Re: Is the :PERFORM stanza still valid?

Fare -- Is there an easy way to find out when ASDF:MAKE-OPERATION was added to the API, so that people can provide backward-compatibility? I suppose it might make sense to do some kind of backward search over the released versions, and for each one, extract a list of exported symbols from ASDF and UIOP. I could probably write a script to do this, but that seems like something that I am unlikely to get around to. R