Yes, you sync you workspace to a particular revision and work within that. Syncing is a manually triggered process. And generally speaking, people changing APIs

Yes, you sync you workspace to a particular revision and work within that. Syncing is a manually triggered process. And generally speaking, people changing APIs are required to find and fix all users (which isn't that hard with the infrastructure available). There is still some churn created by the constant stream of changes, but it's usually not on the changing APIs level.