Fork-based contribution
For repositories where contributors do not have direct write access, a contributor can fork the repository, create a branch in the fork, push changes and open a pull request against the upstream repository.
Keep the fork synchronized
Long-lived forks can fall behind the upstream project. Add an upstream remote and regularly fetch changes so your contribution branch is based on current code.
Follow repository instructions
Read CONTRIBUTING files, issue templates and code style requirements before opening a pull request. Maintainers may have project-specific testing or sign-off requirements.