# Met Guard

> Use Met Guard when a single attack vector needs hardening and you can accept that protection only covers one face. Inspired by the Mettaur's helmet: tough from the front, exposed everywhere else.

- Skill: `hmbown/met-guard` (Agent Skill)
- Install (CLI): `npx skillmds@latest add hmbown/met-guard`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hmbown/met-guard/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: Hmbown (https://skillmd.com/u/hmbown)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/hmbown/met-guard

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# Met Guard

Hunker down behind a hardened front; the sides stay open.

## Overview

Use Met Guard when a single attack vector needs hardening and you can accept that protection only covers one face. Inspired by the Mettaur's helmet: tough from the front, exposed everywhere else.

This is the secondary Codex compatibility rendering of a hybrid battle-chip pattern with a shipping-now execution model.

Canonical chip family: Met Guard
Codex shelf: Defense and Recovery
Provider target: Codex compatibility surface.

## When To Use

- A specific interface, endpoint, or input channel needs hardening against a known threat vector.
- You can clearly identify which direction attacks come from and are willing to leave other faces unguarded.
- Omnidirectional protection is too expensive or unnecessary; a focused shield buys enough time to act.

## Workflow

1. Identify the one direction or surface that needs hardening and name the threat vector explicitly.
2. Place the lightest viable guard on that face: input validation, rate limit, auth gate, or firewall rule.
3. Document which faces are now protected and which remain exposed.

## Deliverables

- A directional guard, gate, or hardened surface applied to one attack vector.
- A brief facing diagram: what is shielded, what is not, and what that means for the operator.

## Guardrails

- Met Guard protects exactly one face. Do not assume coverage extends to sides, rear, or lateral surfaces.
- A directional shield is not a security audit. It buys time; it does not eliminate the threat.
- If you cannot articulate which direction the threat comes from, reassess before deploying.

## Default Invocation

Use Met Guard to harden one specific attack surface with the lightest viable protection, then document exactly where the shield faces and where the blind spots remain.