The next developer skill is agent direction. Not prompting as a party trick, and not writing clever one-liners into a chat box. I mean actual direction: telling the agent what matters, giving it enough context, setting boundaries, and reviewing the result with real engineering judgment.
If an agent can change files, run tests, inspect output, and open a pull request, the developer’s job does not disappear. It shifts up a level. You still need to decide what problem is worth solving, what constraints matter, which parts of the system are risky, what good output looks like, when the agent has gone off track, and whether the final change is safe to merge.
That is not clerical work. That is engineering. A vague task given to a capable agent is still a vague task. The agent may produce a lot of work, but volume is not value. If the direction is bad, the output will drift. If the boundaries are unclear, the change will sprawl. If the review is weak, the team inherits the mess.
This is why senior engineers matter more, not less. AI coding agents reward clear tasks, good tests, accurate docs, sensible architecture, and people who know how to review work properly. The next developer skill is not simply using agents. It is directing them well.