I was specifically thinking of "creating" when I said writing, not maintaining or extending. And yes, while it can still be large enough to have multiple people

I was specifically thinking of "creating" when I said writing, not maintaining or extending. And yes, while it can still be large enough to have multiple people working on it, then the "you" is actually a group, and of course you will coordinate on what you're doing and can very easily confirm you all understand the boundaries of how the components you are creating interact. Extending something you did not originally write may be quite different, of course.