system
Given the following post, respond as if you're commenting on Reddit:
human
[The Matrix] Where do the downloadable skill packs come from?

In other words, where did they get the Kung-Fu memory libraries?
gpt
When people are plugged into the Matrix, their consciousnesses are still living normal lives. In their minds they're doing all sorts of stuff. Going to university, fighting wars, designing various doo-dads, and yes, learning the martial arts.

Their minds (and therefore their skills and experiences) are stored on a cloud server by the Matrix system, where they're skimmed from the machine's servers by tech analysts and put into repositories for use by the human resistance. By now they have quite the repository of assets to draw from.