codewalker n.

A program component that traverses other programs for a living. Compilers have codewalkers in their front ends; so do cross-reference generators and some database front ends. Other utility programs that try to do too much with source code may turn into codewalkers. As in "This new vgrind feature would require a codewalker to implement."

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.