# 4. Clean Architecture Refactor

**Date:** 2025-11-22  
**Version:** 0.1.3  
**Tasks:** TASK-003_1_Refactor_Architecture

## 🚀 Key Changes

### Server Architecture (Clean Architecture Refactor)
Refactored MCP Server architecture to strictly adhere to layer separation principles.

- **Domain Layer (`server/domain/`)**
  - Added interfaces: `interfaces/rpc.py` (`IRpcClient`) and `tools/scene.py` (`ISceneTool`).
  - The Domain layer no longer depends on implementation details.

- **Application Layer (`server/application/`)**
  - Added `tool_handlers/scene_handler.py`: Implementation of `ISceneTool`.
  - The Handler takes over business logic that previously resided in `main.py`.

- **Adapters Layer (`server/adapters/`)**
  - Updated `rpc/client.py`: `RpcClient` now implements `IRpcClient`.
  - Cleaned up `main.py`: Now acts solely as "Composition Root" (Dependency Injection) and Input Adapter (MCP). Contains no business logic.

### Testing
- Verified refactoring correctness with tests (`test_scene_tools.py`, `test_rpc_connection.py`).
