A programming environment for the Common Lisp Object System (CLOS) is outlined and discussed. The system is an example of a hyperstructure environment, i.e., an environ- ment where program information is represented in a network of nodes and links. Hyper- structure programming environments bring the ideas of hypertext into the domain of program- ming. Relations between entities in a program complex can be captured explicitly by link- ing the entities together. A key element in the CLOS environment is a spectrum of edi- tors and browsers that allow a program to be manipulated in terms of the nodes and links of the hyperstructure. Means for constraining the program network as well as techniques for obtaining persistence of the network are also described. A prototype of the system is imple- mented in the Medley Lisp Environment (In- terlisp.)