maybe theres some way to include a list of objects into the autocomplete, but even if you include a list of items, it would not understand return types and class members, just a plain list
to include a truly integrated system it would require a reflection based intelli prompt as the one in monodevelop or visual studio, unless you figure out another way of doing it
i have tried it to do a unity script editor in the past, but i failed horribly in the autocomplete part and it only had syntax hightlighting, i decided to just use something that already existed
sorry that i cant be of help, but kudos to you if you manage to succeed
didn’t get any info back from the author on his site unfortunately. maybe it’s compatible with textmate files as I read something about it supporting plist for syntax.
For those looking for C# unity highlighting in Sublime I wrote a custom language file a while back. You can find it on my blog here: http://www.jacobpennock.com/Blog/?p=490
Update:
I added a language file for JavaScript yesterday.