# antithesis-documentation

Equips coding agents to query Antithesis documentation via the snouty CLI or raw markdown. Handy for setting up deterministic testing and SDKs.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 594 installs · ★ 301
- Author: antithesishq
- License: Apache-2.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/antithesishq/antithesis-skills/tree/HEAD/antithesis-documentation/SKILL.md
- Updated: 2026-10-22
- HTML: https://affpapa.org/en/nevibecode/skills/antithesis-documentation

## What it does

The skill directs your agent to inspect authoritative Antithesis docs using the `snouty` CLI. It navigates structure via `snouty docs tree`, finds topics with `snouty docs search`, and inspects pages through `snouty docs show`. For direct database queries, `snouty docs sqlite` outputs the path to a local SQLite database holding the docs.

When `snouty` is absent or older than version 0.8.0, the agent asks to install it or runs `snouty update`. If the CLI cannot be used, the agent falls back to downloading markdown files directly. Offline sandboxes might trigger doc update warnings, but cached files ensure queries still succeed.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add antithesishq/antithesis-skills --skill antithesis-documentation -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/antithesis-documentation/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/antithesis-documentation/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add antithesishq/antithesis-skills --skill antithesis-documentation -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/antithesis-documentation/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add antithesishq/antithesis-skills --skill antithesis-documentation -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/antithesis-documentation/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install antithesishq/antithesis-skills antithesis-documentation
```

2. **Manually: put the files in place**
- File: `.github/skills/antithesis-documentation/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add antithesishq/antithesis-skills --skill antithesis-documentation -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/antithesishq/antithesis-skills --path antithesis-documentation
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/antithesis-documentation/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add antithesishq/antithesis-skills --skill antithesis-documentation -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/antithesishq/antithesis-skills/tree/HEAD/antithesis-documentation/SKILL.md

## When to use it
- search Antithesis documentation directly from the terminal
- browse the docs hierarchy with snouty tree filters
- locate SDK integration guides without opening a browser
- query local SQLite documentation caches in offline sandboxes

## Example prompts
- How do I set up the Antithesis Go SDK? Check snouty docs.
- Run snouty docs tree with depth 2 to list documentation sections.
- Search the Antithesis documentation for deterministic simulation setup.

## Source text · SKILL.md · Apache-2.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 943839b5f24c6fa8.

BEGIN THIRD-PARTY FILE 943839b5f24c6fa8
```text
---
name: antithesis-documentation
description: Use Antithesis documentation efficiently for product, workflow, and integration questions. Prefer the snouty docs CLI when available, and otherwise request markdown versions of documentation pages directly.
compatibility: Requires snouty (https://github.com/antithesishq/snouty).
metadata:
  version: "2026-10-21 4f8d80b"
---

# Antithesis Documentation

**Skill version:** `2026-10-21 4f8d80b`

## Antithesis Overview

Antithesis is a testing platform that works like a specialized staging environment. You ensure your software is reliable by deploying it to Antithesis and running it there before you deploy it to production. It supplements your existing testing tools and lives alongside your normal CI/CD workflow.

When you deploy to Antithesis, your software runs in a simulation environment that is much more hostile than production. This quickly exposes bugs, including complicated, unlikely, and severe failures.

Because Antithesis's environment is perfectly deterministic, problems are reproducible with minimal effort. Unlike typical shared staging, you do not need to compete for deployment locks or worry about environmental drift since every deployment is completely isolated from one another.

## Accessing Documentation

The best way to access Antithesis documentation on the command line is via the Antithesis CLI which is called snouty.

Run `snouty docs --help` to get started.

## If `snouty` is missing

1. Tell the user `snouty` is the Antithesis CLI.
2. Point them to the install source: `https://github.com/antithesishq/snouty`
3. Ask whether they want you to install it. If yes, follow instructions in `https://raw.githubusercontent.com/antithesishq/snouty/refs/heads/main/README.md`.
4. After installation, re-run `snouty --help`.

If `snouty --version` is older than 0.8.0, run `snouty update` first.

## Using `snouty docs`

Use `snouty docs` to discover authoritative Antithesis documentation before giving detailed guidance. Inspect `snouty docs --help` to discover subcommands and usage examples.

Recommended workflow:

1. Start with `snouty docs tree --depth 2` to get a quick overview of the docs.
2. Use `snouty docs tree <filter>` to explore a section when you know the area but not the exact page name.
3. Use `snouty docs search <terms>` to find likely pages for a specific topic.
4. Use `snouty docs search -l <terms>` when you want just the page paths.
5. Use `snouty docs show <path>` to read the full markdown page once you know the path.
6. Cite the relevant documentation pages in your answer.

Useful details:

- `snouty docs show` accepts page paths like `using_antithesis/sdk/go`.
- `snouty docs show` also accepts `/docs/.../` style paths and tries to normalize them for you.
```
END THIRD-PARTY FILE 943839b5f24c6fa8

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First 2772 of 5193 bytes. © antithesishq · Apache-2.0 · https://github.com/antithesishq/antithesis-skills/tree/HEAD/antithesis-documentation/SKILL.md

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