Will I need a hairline repair? What can I do? (Photo)

Based on the appearance of the grafts at the time of placement it looks like the density of the grafts are good. Six months is pretty typical for a preliminary result that you really need to wait in the entire year. In the meantime having PRP injections would be helpful it's stimulating the transplanted follicles to grow. Make sure that you continue using minoxidil topical solution or even better low dose orally. After one year's time, if you do not see improvement then you may need to have more grafts placed in the hairline.