»real world code«

When you hack into the matrix you have to have code. You can see the person, hear the person who hacks in. When you have trouble hacking in, it might be due to the fact that there is too little real world "code". If you have real world code, the agents will fight you, and you either run, put up a fight for a while, or if you're "the one" you can stay as long as you want. If you're not you get to an exit eventually. Unless there's no agents around. Any thoughts, theories?