openai_rust_sdk 1.3.0

# Modular Refactoring Documentation

This document describes the modular refactoring performed on three large files in the OpenAI Rust SDK to improve maintainability and organization.

## Overview

Three large files were split into modular structures:
- `examples/response_format_demo.rs` (711 lines) → modular structure
- `src/models/moderations.rs` (709 lines) → modular structure  
- `src/models/tools.rs` (788 lines) → modular structure

## 1. Response Format Demo Refactoring

### Original File
- `examples/response_format_demo.rs` (711 lines)

### New Structure
```
examples/
├── response_format_demo_modular.rs          # Main entry point
└── response_format_modules/
    ├── mod.rs                               # Module exports
    ├── type_definitions.rs                  # Data structures
    ├── basic_demos.rs                       # Basic demonstrations
    ├── builders.rs                          # Schema builders
    ├── validation.rs                        # Validation demos
    ├── error_handling.rs                    # Error handling
    └── schema_examples.rs                   # Example schemas
```

### Key Benefits
- **Separation of concerns**: Each module handles a specific aspect
- **Improved maintainability**: Smaller, focused files
- **Better testing**: Modular tests alongside functionality
- **Enhanced readability**: Clear organization of related functionality

## 2. Moderations Module Refactoring

### Original File  
- `src/models/moderations.rs` (709 lines)

### New Structure
```
src/models/
├── moderations_modular.rs                   # Main module entry
└── moderations/
    ├── mod.rs                               # Module exports
    ├── types.rs                             # Core types and enums
    ├── constants.rs                         # Constants and mappings
    ├── request.rs                           # Request structures
    ├── response.rs                          # Response structures
    ├── categories.rs                        # Moderation categories
    ├── scores.rs                           # Confidence scores
    └── builders.rs                         # Builder patterns
```

### Key Benefits
- **Logical grouping**: Related functionality grouped together
- **Easier navigation**: Find specific components quickly
- **Reduced coupling**: Clear module boundaries
- **Simplified testing**: Test individual components

## 3. Tools Module Refactoring

### Original File
- `src/models/tools.rs` (788 lines)

### New Structure  
```
src/models/
├── tools_modular.rs                        # Main module entry
└── tools/
    ├── mod.rs                              # Module exports
    ├── core_types.rs                       # Main tool enumeration
    ├── web_search.rs                       # Web search tools
    ├── file_search.rs                      # File search tools
    ├── function_tools.rs                   # Function calling
    ├── mcp_tools.rs                        # MCP server tools
    ├── image_generation.rs                 # Image generation
    ├── code_interpreter.rs                 # Code interpreter
    ├── computer_use.rs                     # Computer use tools
    ├── tool_choice.rs                      # Tool choice config
    └── builders.rs                         # Builder patterns
```

### Key Benefits
- **Tool-specific modules**: Each tool type has its own module
- **Comprehensive builders**: Organized builder patterns
- **Clear separation**: Different tool types cleanly separated
- **Extensible design**: Easy to add new tool types

## Quality Assurance

All modular files have been analyzed with Codacy CLI and show:
- ✅ No security vulnerabilities (Trivy scan)
- ✅ No code quality issues (Semgrep analysis)
- ✅ Comprehensive test coverage maintained
- ✅ Documentation and examples preserved

## Migration Guide

### For Response Format Demo Users
```rust
// Old usage - still works
mod response_format_demo;

// New modular usage
mod response_format_modules;
use response_format_modules::{
    basic_demos::run_basic_format_demos,
    validation::run_validation_demos,
};
```

### For Moderations API Users  
```rust
// Old usage - still works
use openai_rust_sdk::models::moderations::*;

// New modular usage
use openai_rust_sdk::models::moderations_modular::*;
// Or specific imports:
use openai_rust_sdk::models::moderations_modular::{
    ModerationRequest, ModerationBuilder, SafetyThresholds
};
```

### For Tools API Users
```rust
// Old usage - still works  
use openai_rust_sdk::models::tools::*;

// New modular usage
use openai_rust_sdk::models::tools_modular::*;
// Or specific imports:
use openai_rust_sdk::models::tools_modular::{
    ToolBuilder, EnhancedTool, WebSearchBuilder
};
```

## Benefits Summary

1. **Maintainability**: Smaller, focused modules are easier to maintain
2. **Readability**: Clear organization improves code comprehension
3. **Testing**: Modular structure enables better unit testing
4. **Extensibility**: Easy to add new features to specific modules
5. **Team Development**: Multiple developers can work on different modules
6. **Code Reuse**: Individual modules can be reused in different contexts

## File Size Reduction

| Original File | Original Size | Largest Module | Size Reduction |
|---------------|---------------|----------------|----------------|
| response_format_demo.rs | 711 lines | builders.rs (168 lines) | ~76% per module |
| moderations.rs | 709 lines | response.rs (108 lines) | ~85% per module |  
| tools.rs | 788 lines | builders.rs (315 lines) | ~60% per module |

The modular approach successfully breaks down large files into manageable, focused components while maintaining all functionality and improving code organization.