Add: CONTRIBUTING.md with contribution guidelines

CONTRIBUTING.md

@@ -0,0 +1,105 @@
+# Contributing to Solid Skills
+
+Thank you for your interest in contributing to Solid Skills! This document provides guidelines and instructions for contributing.
+
+## How to Contribute
+
+### Reporting Issues
+
+If you find a bug, have a suggestion, or want to request a feature:
+
+1. Check if the issue already exists in the [Issues](https://github.com/ramziddin/solid-skills/issues) section
+2. Create a new issue with:
+   - Clear title and description
+   - Steps to reproduce (for bugs)
+   - Expected vs actual behavior
+   - Any relevant context
+
+### Submitting Pull Requests
+
+1. **Fork the repository** and clone your fork
+2. **Create a feature branch** from `main`:
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+3. **Make your changes** following the project's coding standards
+4. **Test your changes** to ensure they work correctly
+5. **Commit your changes** with clear, descriptive commit messages:
+   ```bash
+   git commit -m "Add: description of your change"
+   ```
+6. **Push to your fork**:
+   ```bash
+   git push origin feature/your-feature-name
+   ```
+7. **Open a Pull Request** on GitHub with:
+   - Clear title and description
+   - Reference any related issues
+   - Explain what changes you made and why
+
+## Contribution Guidelines
+
+### Code Quality Standards
+
+This project follows SOLID principles, TDD, and clean code practices. When contributing:
+
+- **Write tests first** (TDD approach)
+- **Follow SOLID principles** in all code
+- **Keep functions small** (< 10 lines when possible)
+- **Keep classes focused** (< 50 lines when possible)
+- **Use meaningful names** that express intent
+- **Avoid code smells** (see `skills/solid/references/code-smells.md`)
+
+### Documentation Standards
+
+- Use clear, concise language
+- Provide examples when adding new concepts
+- Keep documentation up-to-date with code changes
+- Follow the existing documentation structure
+
+### Skill Format
+
+Skills follow the [Agent Skills](https://github.com/anthropics/agent-skills) format:
+
+- Each skill has a `SKILL.md` file with frontmatter metadata
+- Reference documentation goes in `references/` subdirectory
+- Use clear headings and structure
+- Include practical examples
+
+### Commit Message Format
+
+Use clear, descriptive commit messages:
+
+- **Add:** for new features
+- **Fix:** for bug fixes
+- **Update:** for improvements to existing features
+- **Refactor:** for code refactoring
+- **Docs:** for documentation changes
+
+Example:
+```
+Add: CONTRIBUTING.md with contribution guidelines
+```
+
+## Development Setup
+
+1. Clone the repository:
+   ```bash
+   git clone https://github.com/ramziddin/solid-skills.git
+   cd solid-skills
+   ```
+
+2. Set up upstream remote:
+   ```bash
+   git remote add upstream https://github.com/ramziddin/solid-skills.git
+   ```
+
+3. Create your feature branch and start contributing!
+
+## Questions?
+
+If you have questions about contributing, feel free to:
+- Open an issue with the `question` label
+- Check existing issues and discussions
+
+Thank you for contributing to Solid Skills! 🎉