Does this mean that when the battery is full you must use the brake pedal? Or does the software automatically apply the friction brakes when you back off the accelerator?
Regen braking is noticeably less powerful when your battery is nearly full, and you have to manually use your friction brakes more. Sounds like it might be a safety issue, but in any scenario where you use regen brakes you have more than enough time to switch to physical brakes if you want to.
that's correct. You don't get one pedal braking if it's not charging.