Optmem Hermes

Independent Hermes integration of Victor Taelin's OptMem design: local, append-only memory with regex/BM25 recall and a bounded wake digest. Hybrid and guarded OptMem-only modes; verified migration and rollback. Local by default. Compaction is manual unless auto_nap is enabled. Optional LLM summaries run only when both auto_nap and llm_summary are on; they send memory blocks to the configured provider via host-owned authentication and may incur token costs. Summaries are lossy, raw records remain recoverable, and conflicts are not resolved automatically. Wake consumes model context. See README for upstream attribution.

Good to know before installing

Memory is stored locally under HERMES_HOME; optional auto_nap+llm_summary sends stored memory lines to the user's configured model provider; the optmem-only mode (explicit CLI with --yes) disables Hermes' built-in MEMORY.md/USER.md injection after a verified backup.

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 optmem-hermes
Said no? Turn it on later:
hermes plugins enable optmem-hermes
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: rarf (Community)
Needs: No API keys declared
Adds tools: optmem_note optmem_recall optmem_nap optmem_wake optmem_zoom optmem_forget optmem_config optmem_import optmem_init
Works on: linux, macos, windows
Needs Hermes: 0.21.2 or newer
Version: 0.3.3
In the catalog: 2026-10-02
GitHub stars: 18

Full setup & settings ↗Source code ↗

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