How to add bots in Half-life 2 deathmatch

You can't dismiss them to my knowledge, but if they're obstructing your path, you can toss the bugbait behind you to direct them elsewhere.

I also seem to remember that if you press hard enough through them, they'll budge out of your way like any other NPC. In any case, it's usually best if you direct them forward as much as possible to soak up enemy bullets.

According to this article:

By default the Half Life 2 engine looks for autoexec.cfg at startup, and if it finds it, it will automatically load and execute all the valid commands in it along with those in config.cfg while starting up Half Life 2.

Additionally, you can create any other .cfg files you need, name them as you wish (as long as they end in .cfg), such as mytweaks.cfg, place them in the same directory as config.cfg, and then run the commands they contain from the Half Life 2 console (or from autoexec.cfg) by using the "exec" command. For example typing the command: exec mytweaks.cfg in the console will execute the command variables contained in the mytweaks.cfg file. They will not run automatically at startup however - only autoexec.cfg and config.cfg can do that.