For us only the original authors squash and tidy up their own commits so they can add as much context as they want. That's not to say each PR is one commit, if

For us only the original authors squash and tidy up their own commits so they can add as much context as they want. That's not to say each PR is one commit, if there are multiple distinct parts of a PR that could be cherry picked in a way that they make sense on their own they'd still be separate commits.