If that's fairly common it doesn't seem like a great setup? Why not automatically run the tests beforehand?
And presumably there is no need for a staging env, since your code is deployed to production as soon as it has passed tests.
And presumably there is no need for a staging env, since your code is deployed to production as soon as it has passed tests.
Edit: Just to clarify, it isn't ok to break downstream projects, if you do the change gets rolled back almost immediately. And you can run all tests for the change before submitting, but it isn't default since it is expensive for many core projects to run so many tests.