MemPalace Claims 96.6% R@5 on LongMemEval With Zero API Calls — and Warns of Malware-Distributing Impostor Domains

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MemPalace/mempalace (57,888 stars) stores conversation history as verbatim text and retrieves it with semantic search, explicitly refusing to summarize, extract or paraphrase; the index is structured into wings (people/projects), rooms (topics) and drawers (original content) so searches can be scoped rather than run flat. It reports 96.6% R@5 raw on LongMemEval with no API calls, on a pluggable backend interface currently defaulting to ChromaDB. The repo now leads with a security caution that impostor sites on .tech, .net and other .com variants may distribute malware — a new failure mode for high-star AI infrastructure.