Heyyo,
Hmm, it's for a HL2 mod in the progress called "Chaotic Inferno." Looks cool... but yeah, it seems to be also made using the leaked beta...
Plus yeah, from what I've heard, bot support for HL2 will be very hard... but it's gotta be possible since HL2, and CS: Source has bot support built in... maybe they just found a new way to implement bots/mod support that they're gonna make us try to figure out? either way, 3rd party mods will probably be harder to implement...