# ath skill

> Check or refresh the instructions your agent uses.

Website: https://ath.fit/docs/skill/
Markdown: https://ath.fit/docs/skill.md

ATH v0.4.3 · MIT license. Documentation source: [cd89f72](https://github.com/mwhitham/ath/blob/cd89f72eceae3961ef1a05694226515c9e4321d2/src/program.ts). If your installed version differs, check its command help.

Checked 27 September 2026: v0.4.3 is available on npm.

## Usage

```text
ath skill
```

## What it does

Lists installed skill copies and whether they match the version shipped with your CLI. Checking status does not change anything.

## Examples

Run ath skill install to install or refresh .agents/skills and copies in existing agent folders using your installed CLI. It does not upgrade ATH or change your training history. Starting in v0.4.2, ath --update also refreshes an existing skill in the current folder.

```text
ath skill install
```

## ath skill install

Install or refresh the skill in this folder. Add --json for structured output.

```text
ath skill install
```

## Options

| Argument or option | Description |
| --- | --- |
| `--json` | structured output, for an agent rather than a person |

## Related commands

- [ath init](https://ath.fit/docs/init/)
- [ath --update](https://ath.fit/docs/update/)