So I'm thinking that I want to insert some testing infrastructure directly into my program, delivering direct, explicit access to the private material. But I don't want to have to strip that stuff out when we go into production.
So I want to code that stuff as tagged comments (similar to the /*jslint*/ comments) and have a tool that converts the comments into executable forms automatically at development time. At production time, JSMin removes them along with the other fluff.
The program that does this is a companion to JSMin called JSDev. You give it a list of the tags you want activated. It reads stdin, looking for those tags, and produces on stdout the activated development-mode program.