simple_bot
... 
simple_bot is a point entity available in the following 
Source games or engine branches:
Left 4 Dead, 
Left 4 Dead 2, 
Team Fortress 2, 
Dota 2 and 
Black Mesa.
Entity Description
It is a very rudimentary example of a NextBot entity, displaying the bare minimum required for the AI system to function.
This entity uses the model of a female Citizen - with no animations associated with it - and is unable to be damaged or killed. If the map has a .nav file, the entity will move to random areas when possible.
As an alternative to using ent_create for spawning instances of simple_bot, the cheat command simple_bot_add will instantly create the entity wherever your crosshair aims at.
Bug:Using simple_bot_add will crash the game immediately in Team Fortress 2. Use ent_create simple_bot instead.