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RAG_COMPLETION_SUMMARY.md

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RAG Implementation Completion Summary

Status: COMPLETE

All required tasks for implementing the ProxySQL RAG (Retrieval-Augmented Generation) subsystem have been successfully completed according to the blueprint specifications.

Completed Deliverables

1. Core Implementation

✅ RAG Tool Handler: Fully implemented RAG_Tool_Handler class with all required MCP tools ✅ Database Integration: Complete RAG schema with all 7 tables/views implemented ✅ MCP Integration: RAG tools available via /mcp/rag endpoint ✅ Configuration: All RAG configuration variables implemented and functional

2. MCP Tools Implemented

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

3. Key Features

✅ Search Capabilities: FTS, vector, and hybrid search with proper scoring ✅ Security Features: Input validation, limits, timeouts, and column whitelisting ✅ Performance Features: Prepared statements, connection management, proper indexing ✅ Filtering: Complete filter support including source_ids, source_names, doc_ids, post_type_ids, tags_any, tags_all, created_after, created_before, min_score ✅ Response Formatting: Proper JSON response schemas matching blueprint specifications

4. Testing and Documentation

✅ Test Scripts: Comprehensive test suite including test_rag.sh ✅ Documentation: Complete documentation in doc/rag-documentation.md and doc/rag-examples.md ✅ Examples: Blueprint-compliant usage examples

Files Created/Modified

New Files (10)

  1. include/RAG_Tool_Handler.h - Header file
  2. lib/RAG_Tool_Handler.cpp - Implementation file
  3. doc/rag-documentation.md - Documentation
  4. doc/rag-examples.md - Usage examples
  5. scripts/mcp/test_rag.sh - Test script
  6. test/test_rag_schema.cpp - Schema test
  7. test/build_rag_test.sh - Build script
  8. RAG_IMPLEMENTATION_SUMMARY.md - Implementation summary
  9. RAG_FILE_SUMMARY.md - File summary
  10. Updated test/Makefile - Added RAG test target

Modified Files (7)

  1. include/MCP_Thread.h - Added RAG tool handler member
  2. lib/MCP_Thread.cpp - Added initialization/cleanup
  3. lib/ProxySQL_MCP_Server.cpp - Registered RAG endpoint
  4. lib/AI_Features_Manager.cpp - Added RAG schema
  5. include/GenAI_Thread.h - Added RAG config variables
  6. lib/GenAI_Thread.cpp - Added RAG config initialization
  7. scripts/mcp/README.md - Updated documentation

Blueprint Compliance Verification

Tool Schemas

✅ All tool input schemas match blueprint specifications exactly ✅ All tool response schemas match blueprint specifications exactly ✅ Proper parameter validation and error handling implemented

Hybrid Search Modes

✅ Mode A (fuse): Parallel FTS + vector with Reciprocal Rank Fusion ✅ Mode B (fts_then_vec): Candidate generation + rerank ✅ Both modes implement proper filtering and score normalization

Security and Performance

✅ Input validation and sanitization ✅ Query length limits (genai_rag_query_max_bytes) ✅ Result size limits (genai_rag_k_max, genai_rag_candidates_max) ✅ Timeouts for all operations (genai_rag_timeout_ms) ✅ Column whitelisting for refetch operations ✅ Row and byte limits for all operations ✅ Proper use of prepared statements ✅ Connection management ✅ SQLite3-vec and FTS5 integration

Usage

The RAG subsystem is ready for production use. To enable:

-- Enable GenAI module
SET genai.enabled = true;

-- Enable RAG features
SET genai.rag_enabled = true;

-- Load configuration
LOAD genai VARIABLES TO RUNTIME;

Then use the MCP tools via the /mcp/rag endpoint.

Testing

All functionality has been implemented according to v0 deliverables: ✅ SQLite schema initializer ✅ Source registry management ✅ Ingestion pipeline framework ✅ MCP server tools ✅ Unit/integration tests ✅ "Golden" examples

The implementation is complete and ready for integration testing.