# LLMSlim: Hermes Agent plugin

> Context engine that compresses older tool output and turns locally with LLMSlim instead of asking a model for a summary: no LLM call, deterministic output, and the start of the prompt is sent unchanged, so prompt…

Canonical: https://hermeswatcher.com/plugins/llmslim  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/llmslim  
Last updated in catalog: 2026-10-27

Context engine that compresses older tool output and turns locally with LLMSlim instead of asking a model for a summary: no LLM call, deterministic output, and the start of the prompt is sent unchanged, so prompt caching keeps working. Select it with context.engine: llmslim.

## Good to know before installing

Installs llmslim==0.11.2 from PyPI (with numpy, scikit-learn and jsonschema); registers no tools, hooks or middleware; makes no network calls, runs no shell commands, needs no credentials, writes no files and sends no telemetry; reads its settings from config.yaml through Hermes's config loader. Token counts use a character estimate unless tiktoken is already installed in Hermes's environment, in which case tiktoken may download its encoding file once.

From the plugin's catalog listing.

## How to install

1. Install it. Hermes asks for any API keys it needs, then asks whether to turn it on.

```bash
hermes plugins install llmslim
```

2. Said no? Turn it on later:

```bash
hermes plugins enable llmslim
```

3. Restart Hermes so it loads the plugin.

Some plugins also need a sign-in or settings: see the official page. Memory plugins ask whether to become your memory provider instead. Steps follow the official plugins guide: https://hermes-agent.nousresearch.com/docs/user-guide/features/plugins

## Facts

- Category: Cost, speed & monitoring
- Maintained by: Thanatos9404 (Community)
- Needs: No API keys declared
- Requires Hermes: `>=0.21.7`
- Version: 0.11.2
- In the catalog since: 2026-10-20, updated 2026-10-27

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/llmslim)
- [Source code](https://github.com/Thanatos9404/llmslim/blob/main/docs/integrations/HERMES.md)
- [All plugins](https://hermeswatcher.com/plugins.md)

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HermesWatcher is an independent guide. It is not affiliated with or endorsed by Nous Research. The [official Hermes Agent documentation](https://hermes-agent.nousresearch.com/docs) and [repository](https://github.com/NousResearch/hermes-agent) from Nous Research are the authority; each page here lists the official sources it was written from. If this site and the official docs disagree, trust the official docs. Index for agents: https://hermeswatcher.com/llms.txt