MemHop

Embedded long-term memory database for AI agents & LLM apps. Six-layer cognitive architecture, knowledge graph, hybrid BM25 + vector search, sleep-time memory consolidation. One.meh file, zero infrastructure, pure Go. Maintained by qyiun666 on GitHub, where it has earned 20 stars from the community.

It's actively developed around agent-memory, ai-memory, bm25, and is a solid reference for anyone building with these tools.