Someone by the name of Guest posted an "answer" with more details, including key words of "TECT" and "Anaben". A Google Books search for those terms brought up excerpts in James Gunn's *The Road to Science Fiction volume 4: From Here to Forever*, from which I worked out that it was George Effinger's "The Ghost Writer". Open Library has a copy of *Universe 3*, which contains that story, and it is a match.