AT or ESP-AT (does ESPHome update it?)

Apologies but I am finding it near impossible to find any relevant results with such a short search term as ‘AT’, whether here on the forums, or the wider Internet.

I came across a comment on an Amazon listing when I was looking to purchase some more ESP-01 about them having a very old AT version. I gather that this is some lower level component of the Espressif firmware stack.

Does this get updated by ESPHome automatically? Or will I have to do some manual intervention?