# Hermes Vcc: Hermes Agent plugin

> Algorithmic (no-LLM) context compaction engine: builds summaries by deterministic regex extraction instead of a summarizer-model call — zero-token, byte-reproducible, inside the built-in ContextCompressor.

Canonical: https://hermeswatcher.com/plugins/hermes-vcc  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/hermes-vcc  
Last updated in catalog: 2026-10-13

Algorithmic (no-LLM) context compaction engine: builds summaries by deterministic regex extraction instead of a summarizer-model call — zero-token, byte-reproducible, inside the built-in ContextCompressor; compacted turns stay searchable via session_search.

## Good to know before installing

No network calls, no env vars, no secrets, no telemetry; registers no tools/hooks/middleware and reads only the turns the host passes for compaction; debug: true (default false) writes one metadata-only file $HERMES_HOME/vcc-debug.json. Derived from pi-vcc (MIT, sting8k)

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 hermes-vcc
```

2. Said no? Turn it on later:

```bash
hermes plugins enable hermes-vcc
```

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: rain-sk (Community)
- Needs: No API keys declared
- Requires Hermes: `>=0.21.6`
- Version: 0.1.0
- In the catalog since: 2026-10-13

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/hermes-vcc)
- [Source code](https://github.com/agentbox-tech/hermes-vcc)
- [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