> Can't it work like, writing this somewhere that says, by creating a pull request, you agree all your code and the discussions around the pull request is now c

> Can't it work like, writing this somewhere that says, by creating a pull request, you agree all your code and the discussions around the pull request is now copyright free? It already does, implicitly. If Author A has a repository with a MIT LICENSE and Author B forks that to their own GitHub account (which they must do in order to open the PR), that fork already has a LICENSE file (usually) together with their change, so the change already been made copyright free.