Perseus Vault adds persistent session memory to Hermes via MCP
Perseus Vault is a Rust binary that connects to Hermes through MCP and gives it a live, constantly updated AGENTS.md built from stored session history. Static like CLAUDE.md or AGENTS.md only capture fixed setup instructions, not what actually happens during a working session — decisions made, bugs fixed, conventions established — so every new session starts from zero. Perseus Vault stores that information in a memory store and surfaces it automatically.
It uses (FTS5) and SQL rather than or probabilistic retrieval, so the same query always returns the same answer, with no risk of hallucinated recall. It ships as a single binary with no external dependencies, exposes 57 MCP tools, keeps a cryptographically chained audit log of changes, runs entirely locally, and is released under the MIT license on GitHub under Perseus-Computing-LLC/perseus-vault.
Key points
- Single Rust binary, connects to Hermes via MCP, zero external dependencies
- Stores session decisions, bug fixes, and conventions so context doesn't reset each session
- retrieval via FTS5 + SQL — no , same query gives same answer
- Ships 57 MCP tools plus a cryptographically chained audit log
- Local-first, , published on GitHub