# MCP Mux Implementation Plan

## Overview
MCP Mux is a Model Context Protocol router that acts as both client and server, simplifying the interface to models by exposing only two tools (`search` and `execute`) instead of potentially thousands, using semantic search to dynamically find and execute the right tools.

## Implementation Status

### Phase 1: Core Infrastructure ✅
- [x] Create project structure
- [x] Update pyproject.toml with dependencies
- [x] Configure entry points for CLI commands
- [x] Set up development environment
- [x] Test basic functionality

### Phase 2: Configuration System ✅
- [x] Implement config management at `~/.mux/config.json`
- [x] Create config schema with Pydantic
- [x] Support MCP server configurations
- [x] Add search method configuration
- [x] Create init command to generate default config
- [x] Test config validation
- [x] Test init command

### Phase 3: MCP Server Implementation ✅
- [x] Create FastMCP server in server.py
- [x] Implement `search` tool
- [x] Implement `execute` tool
- [x] Add proper error handling and logging
- [x] Test stdio transport
- [x] Test server lifecycle management

### Phase 4: MCP Client Management ✅
- [x] Create client connection manager
- [x] Support spawning MCP servers
- [x] Implement tool discovery
- [x] Test tool caching mechanism
- [x] Test server lifecycle (start/stop/restart)
- [x] Handle connection errors gracefully

### Phase 5: Semantic Search Engine ✅
- [x] Integrate FastEmbed
- [x] Implement tool indexing
- [x] Create search interface
- [x] Test with default embedding model
- [x] Add caching for performance
- [x] Test similarity scoring

### Phase 6: CLI Implementation ✅
- [x] Main server command: `mux`
- [x] Init command: `mux init`
- [x] Add argument parsing
- [x] Test help documentation
- [x] Test version command

### Phase 7: Testing & Documentation
- [ ] Write unit tests for core functionality
- [ ] Add integration tests
- [ ] Update README with usage examples
- [ ] Create API documentation
- [ ] Add logging configuration

### Phase 8: FastAPI REST API (Pre-UI)
- [ ] Create FastAPI application
- [ ] Implement configuration CRUD endpoints
- [ ] Add WebSocket for real-time updates
- [ ] Create tool discovery endpoints
- [ ] Add server testing endpoint
- [ ] Implement search endpoint
- [ ] Add static file serving setup

### Phase 9: React UI Development
- [ ] Initialize React app with Vite
- [ ] Set up TypeScript configuration
- [ ] Install Chakra UI v3
- [ ] Create component structure
- [ ] Implement server configuration UI
- [ ] Add tool discovery interface
- [ ] Create search interface
- [ ] Add real-time status updates
- [ ] Implement import/export
- [ ] Build and integrate with FastAPI

## Notes
- The system will be fully functional via CLI and config.json before UI is added
- Each phase should be tested before moving to the next
- FastAPI server (`mux ui`) will initially just serve the API, static file serving will be added when UI is ready
