Mnemostack

Persistent agent memory over a mnemostack service or a local Qdrant — hybrid recall (vector + lexical + graph), verbatim capture with self-echo suppression, and soft retraction. Multi-tenant when pointed at a shared authenticated service; the tenant is resolved server-side from the service key.

Good to know before installing

The pinned directory is a discovery shim; the provider code installs from PyPI at the version pinned in plugin.yaml pip_dependencies (hermes-mnemostack==1.0.3) into the Hermes venv. Configured via MNEMOSTACK_* env vars; no key is required for a purely local Qdrant setup.

From the plugin's catalog listing.

How to install

Install it. Hermes asks for any API keys it needs, then asks whether to turn it on.
hermes plugins install mnemostack
Said no? Turn it on later:
hermes plugins enable mnemostack
Restart Hermes so it loads the plugin.

Some plugins also need a sign-in or settings: see Full setup & settings. Memory plugins ask whether to become your memory provider instead. Steps follow the official plugins guide (opens in a new tab).

Category: Memory & notes
Maintained by: udjin-labs (Community)
Needs: No API keys declared
Adds tools: mnemostack_search mnemostack_remember mnemostack_forget
Needs Hermes: 0.19 or newer
Version: 1.0.3
In the catalog: 2026-09-23, updated 2026-09-27

Full setup & settings ↗Source code ↗

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