Bots are already included in the game Counter-Strike:Source. If you want to have these on your server, you will need to enter a couple of commands in server.cfg. If you want to have bots with us, you will need the corresponding option in your tariff. You can also do this retroactively with a tariff change.
The number of bots that join the server when the server is started.
Sets a clan tag before each bot name.
If this option is active, the bots only appear once a player is on the server.