The skill is learning to supply the LLM with enough context to do anything a developer does: turn specs into code, check its work including generating and running tests, debug and analyze the code for faults or errors, and run these in a loop to converge on a solution. If you're about to do something by hand in an IDE, STOP. Think about what the LLM will need to know to perform that task for you.

It may take some human intervention, but the productivity results are pretty consistent: tasks that used to take weeks now take hours or days. This puts in reach the ability to try things you wouldn't countenance otherwise due to the effort and tedium involved. You'd have to be a damn fool not to take advantage of the added velocity. This is why what we do is called "engineering", not a handicraft.