It depends on the code. If the code is difficult to write, because you need to know a lot of details of other parts, Copilot will struggle. But you can actuall

It depends on the code. If the code is difficult to write, because you need to know a lot of details of other parts, Copilot will struggle. But you can actually think of this as a code quality measure. You want to avoid this. You want to organize the project in a way that writing or modifying the code is easy. That means, make it straightforward how functions are called, how things are done. Minimize interdependencies, side effects. Then Copilot will work quite well.