MIGRATION_PLAN.md•5.72 kB
# Modern MCP Pattern Migration Plan
## Overview
This document outlines the systematic migration of 228 ReaScript tools from the legacy monolithic pattern to the modern modular @mcp.tool() decorator pattern.
## Current Status
- ✅ Proof of concept validated (app_modern_simple.py)
- ✅ FastMCP confirmed working in MCP 1.11.0
- ✅ Modular structure created (server/tools/)
- ✅ Basic track operations migrated as example
- 🔄 228 total tools to migrate
## Tool Categories and Counts
### 1. Track Management (63 tools)
- **Basic Operations** (13): insert, delete, count, select, etc.
- **Properties** (10): name, color, mute, solo, visibility
- **Volume & Pan** (6): volume, pan controls
- **Recording** (6): arm, mode, input settings
- **FX Management** (6): add, remove, enable FX
- **Sends & Routing** (7): sends, receives, routing
- **Automation** (3): automation modes, envelopes
- **Media Items** (3): add, delete items on tracks
- **Analysis** (2): peak levels, monitoring
- **Advanced** (7): freeze, bounce, state chunks
### 2. MIDI Operations (15 tools)
- Note operations
- CC operations
- MIDI editor functions
- MIDI routing
### 3. Media Items & Takes (20 tools)
- Item creation and deletion
- Take management
- Item properties
- Stretching and timing
### 4. FX and Processing (18 tools)
- FX chain management
- Parameter control
- Presets
- FX routing
### 5. Project Management (12 tools)
- Project properties
- Save/load operations
- Project settings
- Render settings
### 6. Transport & Playback (10 tools)
- Play/stop/record
- Loop settings
- Playback rates
- Cursor positions
### 7. Time Selection & Navigation (8 tools)
- Time selection
- Loop points
- Zoom controls
- Grid settings
### 8. Markers & Regions (10 tools)
- Marker creation
- Region management
- Navigation
- Color coding
### 9. Automation & Envelopes (15 tools)
- Envelope creation
- Point manipulation
- Automation items
- Envelope shapes
### 10. Rendering & Freezing (8 tools)
- Render operations
- Freeze/unfreeze
- Bounce operations
- Stem rendering
### 11. GUI & Interface (10 tools)
- Window management
- Toolbar controls
- Theme operations
- Display settings
### 12. Core API & Utilities (20+ tools)
- API checking
- Value conversions
- System operations
- File operations
## Migration Strategy
### Phase 1: Infrastructure (Days 1-2)
1. ✅ Create modular directory structure
2. ✅ Set up bridge module
3. ✅ Create example implementations
4. 🔄 Create tool registration helpers
5. 🔄 Set up testing framework
### Phase 2: Core Tools Migration (Days 3-5)
1. Migrate Track Management (63 tools)
2. Migrate Core API & Utilities (20 tools)
3. Migrate Transport & Playback (10 tools)
4. Create comprehensive tests
### Phase 3: Media & MIDI Migration (Days 6-8)
1. Migrate Media Items & Takes (20 tools)
2. Migrate MIDI Operations (15 tools)
3. Migrate Time Selection (8 tools)
4. Update integration tests
### Phase 4: Advanced Features (Days 9-11)
1. Migrate FX and Processing (18 tools)
2. Migrate Automation & Envelopes (15 tools)
3. Migrate Markers & Regions (10 tools)
4. Migrate Rendering & Freezing (8 tools)
### Phase 5: Final Migration (Days 12-14)
1. Migrate Project Management (12 tools)
2. Migrate GUI & Interface (10 tools)
3. Migrate remaining tools
4. Final testing and validation
### Phase 6: Cleanup & Documentation (Day 15)
1. Remove legacy code
2. Update all documentation
3. Create migration guide for users
4. Final release preparation
## File Organization
```
server/
├── app_modern.py # Main server file
├── bridge.py # Shared bridge module
└── tools/
├── __init__.py # Package initialization
├── tracks.py # Track management (63 tools)
├── midi.py # MIDI operations (15 tools)
├── media_items.py # Media items & takes (20 tools)
├── fx.py # FX and processing (18 tools)
├── project.py # Project management (12 tools)
├── transport.py # Transport & playback (10 tools)
├── time_selection.py # Time & navigation (8 tools)
├── markers.py # Markers & regions (10 tools)
├── automation.py # Automation & envelopes (15 tools)
├── render.py # Rendering & freezing (8 tools)
├── gui.py # GUI & interface (10 tools)
└── core_api.py # Core API & utilities (20+ tools)
```
## Tool Registration Pattern
Each module will export functions without decorators:
```python
# tools/tracks.py
async def insert_track(index: int, use_defaults: bool = True) -> str:
"""Insert a new track"""
# implementation
```
The main server will register tools:
```python
# app_modern.py
@mcp.tool()
async def insert_track(index: int, use_defaults: bool = True) -> str:
"""Insert a new track at the specified index"""
return await tracks.insert_track(index, use_defaults)
```
## Testing Strategy
1. Unit tests for each module
2. Integration tests for tool registration
3. End-to-end tests with REAPER
4. Performance benchmarks
5. Backwards compatibility tests
## Success Criteria
- All 228 tools migrated successfully
- All tests passing
- Performance equal or better than legacy
- Clean, maintainable code structure
- Comprehensive documentation
- Smooth upgrade path for users
## Risk Mitigation
1. Keep legacy code available during migration
2. Test each phase thoroughly before proceeding
3. Maintain backwards compatibility
4. Create rollback procedures
5. Document all breaking changes
## Timeline
- Total Duration: 15 days
- Start Date: [TBD]
- End Date: [TBD]
- Daily Progress Updates
- Weekly stakeholder reviews