Coding agents are good now. They can write a function, fix a failing test, or walk you through a chunk of legacy code you'd rather not read. That part is settled. The harder question is what happens when you hand one a real piece of delivery work, something that has to change the database and the API and the UI and the tests all together, and keeps running long after you've stepped away from your desk.That's usually where a single agent starts to struggle, and it isn't because the model isn't smart enough. The limit is human attention. A team might have fifty things sitting in its backlog that an agent could help with, but somebody still has to scope each one, keep an eye on it, review what comes back, and confirm it actually works. So you can generate code far faster than before and still ship at about the same pace. The slow part just moved.