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Contributing

Thank you for your interest in contributing to CORE! There are two main ways to contribute: rule contributions (via cdisc-open-rules) and engine contributions (code, tests, documentation in this repository).

Rule Contributions

Conformance rules are maintained separately in cdisc-open-rules. If you want to:

  • Propose a new conformance rule
  • Report an issue with an existing rule's logic
  • Contribute a rule implementation

Please open an issue or pull request in that repository.

For questions about rule contribution workflows, post in GitHub Discussions.

Engine Contributions

Setting Up the Development Environment

Follow the Development → Environment Setup guide to clone the repository and install dependencies.

Code Style

This project enforces consistent formatting and linting via pre-commit hooks.

Tools used:

Install the dev dependencies (into your venv) and the pre-commit hooks:

pre-commit install

This installs the hooks into .git/hooks/ so formatting and linting run automatically on each commit.

To run the checks manually:

pre-commit run --all-files

Running Tests

python -m pytest tests

This runs both unit and regression tests. All tests must pass before submitting a pull request.

Submitting a Pull Request

  1. Fork the repository and create a feature branch from main.
  2. Make your changes, following the code style guidelines above.
  3. Add or update tests for any changed behavior.
  4. Ensure all tests pass locally.
  5. Open a pull request with a clear description of the change and the motivation behind it.

For larger changes or new features, consider opening a GitHub Discussion or issue first to align on the approach.

Reporting Bugs & Requesting Features

Use GitHub Issues to report bugs or request features.

When reporting a bug, please include:

  • A clear description of the problem
  • Steps to reproduce
  • Your operating system and Python version (or executable version)
  • Relevant logs or error messages

Questions & Discussion

For general questions, use the Q&A discussion board. Please search existing discussions before opening a new one.