Mnemosyne — memory palace + safe curation for LLM agents.
Extracted from the Birkin personal-agent project (MIT).

The retrieval design (BM25 + usage-driven Ebbinghaus decay + zone priority) and
the CurationPlan/1 safe-curation interface are described in the companion paper
"Mnemosyne: A Zero-Dependency Memory Palace for Personal LLM Agents, with a
Model-Agnostic Curation Interface" (Birkin project, 2026).
