# Changelog: Router Directory Structure

**Date:** 2025-12-01
**Task:** TASK-039-1
**Type:** Infrastructure

---

## Summary

Established the foundational directory structure for the Router Supervisor module following Clean Architecture principles.

---

## Changes

### New Directories

```
server/router/
├── domain/entities/
├── domain/interfaces/
├── application/interceptor/
├── application/analyzers/
├── application/engines/
├── application/classifier/
├── application/workflows/
├── infrastructure/tools_metadata/{scene,system,modeling,mesh,material,uv,curve,collection,lattice,sculpt,baking}/
└── adapters/
```

### New Files

| File | Description |
|------|-------------|
| `server/router/__init__.py` | Module entry point |
| `server/router/infrastructure/config.py` | RouterConfig dataclass |
| `server/router/infrastructure/metadata_loader.py` | Metadata loader placeholder |
| `server/router/infrastructure/logger.py` | Logger placeholder |
| `server/router/infrastructure/tools_metadata/_schema.json` | JSON Schema for tool metadata |
| `server/router/application/router.py` | SupervisorRouter placeholder |
| `server/router/adapters/mcp_integration.py` | MCP integration placeholder |

### Documentation

- `_docs/_ROUTER/IMPLEMENTATION/01-directory-structure.md` - Implementation guide

---

## Architecture

The router follows Clean Architecture with four layers:

1. **Domain** - Pure entities and interfaces (no dependencies)
2. **Application** - Use cases and implementations
3. **Infrastructure** - Config, logging, data loading
4. **Adapters** - External system integration (MCP)

---

## Next Steps

- TASK-039-2: Domain Entities
- TASK-039-3: Domain Interfaces
