vaporif

Parry — Data skill for Claude Code

Data community intermediate

by Dmytro Onypko - Prompt injection scanner for Claude Code hooks.

How to install Parry

This entry records only its repository, not the path inside it, so there is no exact command to give. Open vaporif/parry-guard and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Parry does

[](https://github.com/vaporif/parry/actions/workflows/check.yml) [](https://github.com/hesreallyhim/awesome-claude-code)

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README

Parry-guard

[](https://github.com/vaporif/parry/actions/workflows/check.yml) [](https://github.com/hesreallyhim/awesome-claude-code)

Prompt injection scanner for Claude Code hooks. Scans tool inputs and outputs for injection attacks, secrets, and data exfiltration attempts.

**Early development** — this tool is under active development and may have bugs or false positives. Tested on linux/macOS.

Prerequisites

The ML models are gated on HuggingFace. Before installing:

Create an account at huggingface.co
Accept the DeBERTa v3 license (required for all modes)
For full mode: also accept the Llama Prompt Guard 2 license (Meta approval required)
Create an access token at huggingface.co/settings/tokens

Usage

Add to `~/.claude/settings.json`:

**With [uvx](https://docs.astral.sh/uv/):**

{
  "hooks": {
    "PreToolUse": [{ "command": "uvx parry-guard hook", "timeout": 1000 }],
    "PostToolUse": [{ "command": "uvx parry-guard hook", "timeout": 5000 }],
    "UserPromptSubmit": [{ "command": "uvx parry-guard hook", "timeout": 2000 }]
  }
}

**With [rvx](https://github.com/vaporif/rvx):**

{
  "hooks": {
    "PreToolUse": [{ "command": "rvx parry-guard hook", "timeout": 1000 }],
    "PostToolUse": [{ "command": "rvx parry-guard hook", "timeout": 5000 }],
    "UserPromptSubmit": [{ "command": "rvx parry-guard hook", "timeout": 2000 }]
  }
}

**With parry-guard on PATH** (via [Nix](#nix-home-manager), cargo install, or [release binary](https://github.com/vaporif/parry/releases)):

{
  "hooks": {
    "PreToolUse": [{ "command": "parry-guard hook", "timeout": 1000 }],
    "PostToolUse": [{ "command": "parry-guard hook", "timeout": 5000 }],
    "UserPromptSubmit": [{ "command": "parry-guard hook", "timeout": 2000 }]
  }

...