How to make the camera track a moving robot

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When the robot moves, how do you make the camera track it, so the robot doesn't move out of the viewing pane?

I'm assuming I'll need to write a world plugin, but it's unclear how to programmatically access the camera. I see there's API documentation, but it's not searchable, so I'm not sure where to begin looking.

Also, is there a maximum limit to where the robot can move in the simulated world? When placing models, I noticed there appears to be min/max limits on the ground where models can be placed, implying the world is not infinite and that a moving robot would eventually run into some sort of invisible wall.