CodeGraph CLI MCP Server

# CodeGraph System Architecture Overview ```mermaid graph TB subgraph "Application Layer" CLI[CLI Tools] Web[Web Interface] API[API Gateway] MCP[MCP Server] end subgraph "AI/ML Intelligence Layer" RAG[RAG Engine] EMB[Embedding Service] NLP[NLP Processing] CTX[Context Manager] end subgraph "API Protocol Layer" GQL[GraphQL API] REST[REST API] WSS[WebSocket/SSE] SDK[Client SDKs] end subgraph "Processing Layer" PAR[Code Parser] ANA[Semantic Analyzer] IND[Indexing Engine] QUE[Query Engine] end subgraph "Storage Layer" GS[Graph Store] VS[Vector Store] FS[File System] CACHE[Cache Layer] end subgraph "Infrastructure Layer" RDB[(RocksDB)] FAISS[(FAISS Index)] MEM[Memory Pool] NET[Network Layer] end CLI --> API Web --> API API --> RAG MCP --> RAG RAG --> EMB RAG --> CTX EMB --> NLP GQL --> QUE REST --> QUE WSS --> QUE PAR --> IND ANA --> IND IND --> VS QUE --> GS GS --> RDB VS --> FAISS CACHE --> MEM NET --> ALL ```