# P3 Code Review Rules - Best Practices (Medium)

**Priority Level:** P3 (Medium)
**Focus:** Best practices and maintainability

## 1. Code Quality Standards

- Follows project coding standards and conventions
- DRY principle - eliminates code duplication
- Single Responsibility Principle adherence
- Clear and meaningful variable/function names
- Functions are small and focused

## 2. Documentation Requirements

- Public APIs have comprehensive docstrings
- Complex logic is well-commented
- README and documentation updated for user-facing changes
- Examples provided for new features
- Changelog entries for significant changes

## 3. Error Handling

- Proper exception handling and logging
- User-friendly error messages
- Graceful degradation where possible
- Appropriate error types and status codes

## 4. Maintainability

- Code is readable and well-structured
- Dependencies are minimal and justified
- Configuration is externalized appropriately
- Code follows SOLID principles

## Review Guidelines

**Code Quality Checklist:**
- [ ] Follows coding standards
- [ ] No code duplication
- [ ] Single responsibility per function/class
- [ ] Clear naming conventions
- [ ] Functions are appropriately sized

**Documentation Checklist:**
- [ ] Public APIs documented
- [ ] Complex logic commented
- [ ] Documentation updated
- [ ] Examples provided
- [ ] Changelog updated

**Error Handling Checklist:**
- [ ] Proper exception handling
- [ ] User-friendly error messages
- [ ] Graceful degradation
- [ ] Appropriate error types

**Maintainability Checklist:**
- [ ] Code is readable
- [ ] Dependencies justified
- [ ] Configuration externalized
- [ ] SOLID principles followed