the official stance about packages/installers is:
each game should have its own installer, so eg Kernel Panic, S44, ...
but about the engine package as we know it:
all the packages should include/allow to install the same things. eg the linux packages should include the smae as the windows installer. In practice, the windows (engine-)installer is maintained by the engine devs, and linux packages are maintained by others (eg YokoZar for Ubuntu). The engine devs decide what is ot be in the windows installer, and then the package devs usually adopt that. As there are more and more AI projects comming up, we will not be including all of them in the windows installer. I would of course

, but as many do not use AIs at all, it would be bad to have the installer blown up in size just for them.
It is possible though, to include an AI in the installer menu, as an option, and let it be downloaded when ticked. Though that has not been done yet (for AIs), so we would need to put that together first (though it should be little work, as it is done for the lobbies already).
For linux, we would probably have a default AIs and an optional AIs package.. or the former beeing part of the engine packge maybe.
short: It is a decission for package maintainers and the AI community, the only restriction form the engine devs is: not to use more space for AIs in the windows installer, and not to confuse users with a single list of 20 AIs to choose from when installing.
Hugh
It is very unlikely that your AI will be in the next release of the engine installer or any linux packages. Even Errors AI is not yet in the windows installer, though it is pretty good already. Your AI will only get there after some wide testing and happy users.
You should try to get your AI to the man like Error323 does it. just post a zip in your AIs forum thread, which users can just extract into their spring fodler and get going with your AI. You have it more simple there, as you dont need to supply a package for each OS separately.
what you explained in your last post is not possible. you either have to test your AI on linux as well, to test if it works, or find someone that does this for you. Though, things have to go really bad for a JVM based AI to work on one OS and not on the other.