Hello, and welcome to the forums. Downloading the source and checking out the AI code is definitely a good start. Please read through: http://trac.wildfiregames.com/wiki/GettingStarted , and http://trac.wildfiregames.com/wiki/GettingStartedProgrammers for the starting information (if you're just going to focus on the AI, and thus javascript programming, some parts might not be as important as the rest). The #0ad-dev IRC channel on Quakenet is probably the best place for real time discussion (provided someone is online of course, but evening/night European time there's usually at least someone, and plenty of people read the logs/are logged in all time and will respond when they're at their computer), and the Game Development & Technical Discussion forum is a good place for more long-term/deeper discussion. Of particular interest to you is: http://www.wildfiregames.com/forum/index.php?showtopic=17144 which deals with the AI development, and more specifically where it's going.