Perseus Vault

Perseus Vault is a single ~8MB Rust binary that gives AI agents durable, portable memory across sessions with no Docker, no Postgres, and no cloud. It is MCP-native (55 tools), local-first, and fully air-gapped by default: AES-256-GCM encryption at rest, hybrid BM25 + dense-vector + RRF search, bi-temporal (transaction-time and valid-time) history, an immutable audit journal with chain-of-custody, an entity link graph with GraphRAG community detection, and biomimetic Ebbinghaus decay for memory lifecycle management. Bundled in-process embeddings (a quantized all-MiniLM-L6-v2 model) make semantic search work with zero config and zero network. Ready-to-use adapters ship for LangGraph, CrewAI, AutoGen, LangChain, PydanticAI, Haystack, and Google ADK. MIT-licensed and designed for privacy-sensitive and government deployment (published SBOM, offline operation, encryption at rest).