i know how to implement the A* algorithm.but how do i use it in my engine?
if i get a polyline, how am i gonna able to drive on it.

In addition to this, the rules governing whether it is
possible to navigate from any given point A to a secondary
point B are entirely dependent on the skater’s state
at point A. The state required at point A involves a large
number of variables, as well as a complex set of previously
executed maneuvers to have reached it.

lemme put it with example

my car is on postion (0,0,0)
i wanna go to (10,0,50) then to (20,0,70) and so on,
i have methods for accelerating,bracking,steering left,right.
if the point is straight ahead, i want to accelerate, if it is not, i have to steer.
its simple enough to say, but i m not able to implement it.
how am i gonna able to solve this problem. if not code then an algorithm explanation with example will be very nice. thanku

Multiple points would be needed for corners. AI skater(s) would then rotate to axis to next point. Just mathematically get axis from current point to next point.