There's a Vim Syntax highlighting for gdx-ai behavior tree files on github. I've not tried it though.
Awesome! That's a good start (and it probably can even work on Android with TerminalIDE, which is also a good point for me).
BTW there's also an open source tool to convert FreeMind files to gdx-ai btree files. You can find this and other useful links here
That's good stuff too, thanks! Now I have no excuse to not try gdx-ai :)Actually I may have a look soon!