# Jev Typesafe: Hermes Agent plugin

> TypeSafe Jev (System One) decision tools — atomic yes/no checks, routing, rubric scoring and mixed typed questions with calibrated probabilities, for triage, routing and review gating in coding agents.

Canonical: https://hermeswatcher.com/plugins/jev-typesafe  
Tier: Community  
Official page (Nous Research): https://hermes-agent.nousresearch.com/docs/plugins/jev-typesafe  
Last updated in catalog: 2026-09-19

TypeSafe Jev (System One) decision tools — atomic yes/no checks, routing, rubric scoring and mixed typed questions with calibrated probabilities, for triage, routing and review gating in coding agents.

## Good to know before installing

Every tool call sends the model-supplied question/state together with your TYPESAFE_API_KEY to api.typesafe.ai (TypeSafe AI, an independent vendor); the catalog has not verified the plugin author's affiliation with that vendor.

From the plugin's catalog listing.

## How to install

1. Install it. Hermes asks for any API keys it needs (this one needs `TYPESAFE_API_KEY`), then asks whether to turn it on.

```bash
hermes plugins install jev-typesafe
```

2. Said no? Turn it on later:

```bash
hermes plugins enable jev-typesafe
```

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: Anders Jensen-Waud (Community)
- Needs: `TYPESAFE_API_KEY` (API key)
- Adds tools: `jev_evaluate`, `jev_check`, `jev_route`, `jev_score`
- Requires Hermes: `>=0.19`
- Version: 0.1.0
- In the catalog since: 2026-09-19

## Links

- [Full setup and settings (official page)](https://hermes-agent.nousresearch.com/docs/plugins/jev-typesafe)
- [Source code](https://github.com/ajensenwaud/hermes-jev-plugin/blob/b3d29f71770a3447ad0b3db00658f64a8edc7dd3/README.md)
- [All plugins](https://hermeswatcher.com/plugins.md)

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