okf

MCP-Memory is an open-source MCP server that gives AI agents persistent memory using Google's Open Knowledge Format and SQLite FTS5 for fast retrieval and search.

The author benchmarks classic vector RAG against Google's new Open Knowledge Format (OKF) and a hybrid approach using a local stack (Ollama, ChromaDB), finding hybrid retrieval answers more questions correctly but at higher token cost, while highlighting specific failure modes.