Are the short hairs at the edge of my hairline, hairs that are miniaturizing and will eventually fall out? (photo)

The short hairs at the leading edge of your hairline are vellus hairs and these are normally present in everyone and evident when you zoom in on a frontal hairline as you have here. If you want to know if you are receding, I need to see a photo from the front with your eyebrows lifted high so the forehead creases. A normal mature hairline in a male, is one finger breadth above the highest crease.