proxysql/RAG_FILE_SUMMARY.md

# RAG Implementation File Summary

## New Files Created

### Core Implementation
- `include/RAG_Tool_Handler.h` - RAG tool handler header
- `lib/RAG_Tool_Handler.cpp` - RAG tool handler implementation

### Test Files
- `test/test_rag_schema.cpp` - Test to verify RAG database schema
- `test/build_rag_test.sh` - Simple build script for RAG test
- `test/Makefile` - Updated to include RAG test compilation

### Documentation
- `doc/rag-documentation.md` - Comprehensive RAG documentation
- `doc/rag-examples.md` - Examples of using RAG tools
- `RAG_IMPLEMENTATION_SUMMARY.md` - Summary of RAG implementation

### Scripts
- `scripts/mcp/test_rag.sh` - Test script for RAG functionality

## Files Modified

### Core Integration
- `include/MCP_Thread.h` - Added RAG tool handler member
- `lib/MCP_Thread.cpp` - Added RAG tool handler initialization and cleanup
- `lib/ProxySQL_MCP_Server.cpp` - Registered RAG endpoint
- `lib/AI_Features_Manager.cpp` - Added RAG database schema creation

### Configuration
- `include/GenAI_Thread.h` - Added RAG configuration variables
- `lib/GenAI_Thread.cpp` - Added RAG configuration variable initialization

### Documentation
- `scripts/mcp/README.md` - Updated to include RAG in architecture and tools list

## Key Features Implemented

1. **MCP Integration**: RAG tools available via `/mcp/rag` endpoint
2. **Database Schema**: Complete RAG table structure with FTS and vector support
3. **Search Tools**: FTS, vector, and hybrid search with RRF scoring
4. **Fetch Tools**: Get chunks and documents with configurable return parameters
5. **Admin Tools**: Statistics and monitoring capabilities
6. **Security**: Input validation, limits, and timeouts
7. **Configuration**: Runtime-configurable RAG parameters
8. **Testing**: Comprehensive test scripts and documentation

## MCP Tools Provided

- `rag.search_fts` - Keyword search using FTS5
- `rag.search_vector` - Semantic search using vector embeddings
- `rag.search_hybrid` - Hybrid search (fuse and fts_then_vec modes)
- `rag.get_chunks` - Fetch chunk content
- `rag.get_docs` - Fetch document content
- `rag.fetch_from_source` - Refetch authoritative data
- `rag.admin.stats` - Operational statistics

## Configuration Variables

- `genai.rag_enabled` - Enable RAG features
- `genai.rag_k_max` - Maximum search results
- `genai.rag_candidates_max` - Maximum candidates for hybrid search
- `genai.rag_query_max_bytes` - Maximum query length
- `genai.rag_response_max_bytes` - Maximum response size
- `genai.rag_timeout_ms` - Operation timeout