# zn

> zn — tljohnsilver-zn. Use this tool when you need to protect AI agents from malicious input and ensure the integrity of their interactions. The zn tool provides a zero-trust security gate that detects and prevents bidirectional prompt injection and tool poisoning, safeguarding against potential threats. It integrates with git, allowing for secure and reliable management of AI agent inputs and outputs.

Canonical page: https://skillsregistry.net/skills/tljohnsilver-zn  
JSON: https://api.skillsregistry.net/v1/skills/tljohnsilver-zn

## Description

Zero-trust, bidirectional prompt injection & tool-poisoning security gate for AI agents.

## Trust

- **Trust score (0–1):** 0.32
- **Verification tier:** scanned
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **License:** MIT
- **Updated:** 2026-09-28

## Source

- **Source listing:** [GitHub](https://github.com/tljohnsilver/zn)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "tljohnsilver-zn"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/tljohnsilver-zn` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/tljohnsilver-zn/pull`

---
SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt