# UX3 Product Design Harness: Hermes Agent plugin

> MIT-licensed product judgment across User, Evidence and Business flows, with one portable Agent Plugins v1 skill and all 91 original skill files.

Canonical: https://hermeswatcher.com/plugins/ux3-product-design-harness  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/ux3-product-design-harness  
Last updated in catalog: 2026-10-23

MIT-licensed product judgment across User, Evidence and Business flows, with one portable Agent Plugins v1 skill and all 91 original skill files.

## Good to know before installing

Skill instructions run bundled local Python/jsonschema validators and read/write user-controlled local briefs, context packs and review outputs, which can contain personal data. Optional evidence gathering uses explicitly user/host-authorized tools, including external search and connectors; selected claims, queries or evidence go to the chosen services under their policies. There is no publisher-operated receiving endpoint, retention service, telemetry or background process. The bundled jev_gate.py runs offline; connecting a remote decision service needs separate configuration and consent. No MCP server, native plugin entrypoint, registered tools, hooks or middleware.

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 ux3-product-design-harness
```

2. Said no? Turn it on later:

```bash
hermes plugins enable ux3-product-design-harness
```

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: Coding & developer tools
- Maintained by: cis2042 (Community)
- Needs: No API keys declared
- Requires Hermes: `>=0.22.4`
- Version: 0.2.0
- In the catalog since: 2026-10-23

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/ux3-product-design-harness)
- [Source code](https://github.com/cis2042/ux3-product-design-harness/blob/48965c6b501f61ebbb8130c9c2e4f9af08922b9f/README.md)
- [All plugins](https://hermeswatcher.com/plugins.md)

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