LeandroPG19/cuba-memorys

Implements a PostgreSQL-backed knowledge graph with exponential decay memory (30-day halflife) and Hebbian learning via Oja's rule, storing entities, typed relations, and observations with automatic deduplication and contradiction detection. Provides hybrid search combining full-text (pg_trgm), semantic (pgvector HNSW), and graph traversal via entropy-routed reciprocal rank fusion, plus graph analytics (Leiden communities, Brandes centrality, PageRank) for anti-hallucination grounding. Built as an MCP server with 13 tools for knowledge engineering, error tracking, session awareness, and autonomous REM-sleep consolidation that runs on PostgreSQL 18+ with optional ONNX embeddings.