MemPalace: Open-Source AI Memory System With Hierarchical Architecture at 49.2K Stars

GitHub·medium signal

MemPalace stores AI conversation history as verbatim text in a hierarchical structure — wings, halls, rooms, closets, tunnels — using SQLite and ChromaDB for local persistence under MIT license. Claims highest score on LongMemEval benchmark (96.6% raw, 100% hybrid), though the hybrid score was achieved after targeted fixes for specific failing questions. Created April 5, 2026, it reached 49K stars in under three weeks.