The vocabulary is already there. What is out of place is the perception of where the defaults lie. Right now we seem to assume that, unless someone takes the time to write out rules explicitly saying what they're not willing to do, then they must be willing to do it.
It should be just the other way around. If a project wants contributions, for example, then they can communicate that by posting contribution guidelines in the README.
It should be just the other way around. If a project wants contributions, for example, then they can communicate that by posting contribution guidelines in the README.