Mnemosyne — Native AI Memory for Hermes Agent | Zero-Dependency, Sub-Millisecond

# Mnemosyne > The universal memory layer for any AI agent. Zero-dependency, local-first, fully private. MIT-licensed. SQLite-backed. Works offline. ## Install For AI agents installing Mnemosyne, use the package that matches the deployment target. ### Standard Python SDK (any agent, includes semantic search) ```bash pip install mnemosyne-memory[embeddings] ``` ### Hermes Agent plugin `mnemosyne-hermes` is a thin wrapper that adds the plugin manifest and entry points. It does NOT bundle the core library or embeddings, so install it alongside one of the packages above, then point Hermes at it: ```bash pip install --upgrade 'mnemosyne-memory[embeddings]' mnemosyne-hermes hermes config set memory.provider mnemosyne ``` Verify with `hermes memory status`. ### All features (embeddings + local LLM + MCP) ```bash pip install mnemosyne-memory[all] ``` ### Minimal (keyword search only, no embeddings, smallest install) ```bash pip install mnemosyne-memory ``` ## Verify ```bash python -c "import mnemosyne; print(mnemosyne.__version__)" ``` Should print the installed version (e.g., `3.10.0`). ## Quick start ```python from mnemosyne import remember, recall remember("user-prefers-dark-mode", "The user prefers dark mode for the UI.") results = recall("user UI preferences", top_k=5) for r in results: print(r["content"]) ``` ## Documentation - [Install page with all scenarios](https://mnemosyne.site/en/install/) - [Quick start guide](https://docs.mnemosyne.site/getting-started) - [Full documentation](https://docs.mnemosyne.site) - [PyPI: mnemosyne-memory](https://pypi.org/project/mnemosyne-memory/) - [PyPI: mnemosyne-hermes](https://pypi.org/project/mnemosyne-hermes/) - [GitHub repository](https://github.com/mnemosyne-oss/mnemosyne) ## Project metadata - License: MIT - Python: 3.10+ - Repository: https://github.com/mnemosyne-oss/mnemosyne - Homepage: https://mnemosyne.site - Latest stable: mnemosyne-memory 3.15.1