MemPalace v3.3.1 Released April 18 — 48K Stars, 96.6% Recall Without API Calls, 29 MCP Tools, Knowledge Graph With Temporal Entities

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MemPalace, the open-source AI memory system using the Method of Loci architecture, shipped v3.3.1 on April 18 reaching 48K stars. Achieves 96.6% R@5 on LongMemEval without external API calls (98.4% hybrid, 99%+ with reranking). Ships 29 MCP tools, auto-save hooks for Claude Code, and a knowledge graph with temporal entity relationships. Uses SQLite + ChromaDB locally under MIT license with a 30x AAAK compression dialect for long context loading.