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CONTRIBUTING.md

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+# Contributing to Astro Documentation PDF Generator
+
+Thank you for your interest in contributing to this project!
+
+## License Notice
+By contributing to this project, you agree that your contributions will be licensed under the GNU Affero General Public License v3.0.
+
+## How to Contribute
+1. Fork the repository
+2. Create your feature branch (`git checkout -b feature/AmazingFeature`)
+3. Make your changes
+4. Add appropriate copyright notices to any new files:
+```python
+"""
+Copyright (C) 2024 PacFactory
+This file is part of Astro Documentation PDF Generator.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+"""
+```
+5. Commit your changes (`git commit -m 'Add some AmazingFeature'`)
+6. Push to the branch (`git push origin feature/AmazingFeature`)
+7. Open a Pull Request
+
+## Code of Conduct
+- Be respectful of others
+- Focus on constructive feedback
+- Follow the AGPL-3.0 license requirements
+
+## Development Guidelines
+1. Maintain clear attribution of original work
+2. Document all significant changes
+3. Ensure source code remains accessible
+4. Maintain compatibility with AGPL-3.0 requirements
+
+## Questions?
+If you have questions about licensing or contribution requirements, please open an issue.