# Iron Shield

> Use Iron Shield when a public-facing surface, endpoint, or interface needs durable, ongoing protection against repeated attacks on the same vector. Unlike a one-time absorb or a brittle guard, Iron Shield maintains a sustained defensive posture that endures multiple impacts from the front.

- Skill: `hmbown/iron-shield` (Agent Skill)
- Install (CLI): `npx skillmds@latest add hmbown/iron-shield`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hmbown/iron-shield/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/iron-shield

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# Iron Shield

Raise a durable frontal barrier that holds under sustained assault.

## Overview

Use Iron Shield when a public-facing surface, endpoint, or interface needs durable, ongoing protection against repeated attacks on the same vector. Unlike a one-time absorb or a brittle guard, Iron Shield maintains a sustained defensive posture that endures multiple impacts from the front.

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

Canonical chip family: Iron Shield
Codex shelf: Defense and Recovery
Provider target: Codex compatibility surface.

## When To Use

- A public endpoint, API surface, or input boundary faces repeated adversarial traffic and needs sustained hardening.
- You need to reinforce a single attack vector that has already been hit more than once and will keep getting hit.
- Basic shield-level protections have been applied but are not durable enough for the volume of incoming abuse.

## Workflow

1. Identify the specific frontal vector under sustained attack and audit all entry points along that surface.
2. Harden the vector with layered, durable defenses designed to hold under repeated impact without breaking.
3. Validate that the hardened surface withstands sustained adversarial testing and that coverage elsewhere has not been neglected.

## Deliverables

- A hardened, directional defensive configuration protecting the identified frontal surface against repeated abuse.
- A durability report confirming the shield holds under sustained load and documenting what it does and does not cover.

## Guardrails

- Iron Shield protects one direction. Flanks and rear remain exposed; do not assume full perimeter coverage.
- A shield that stays raised indefinitely becomes a wall. Set clear conditions for when the defensive posture relaxes.
- Do not use Iron Shield when a single absorb-and-clear is sufficient — use Barrier for transient threats.

## Default Invocation

Use Iron Shield to harden a public-facing surface against sustained, repeated attacks on the same vector: apply durable layered defenses designed to hold under continuous impact, and verify the shield endures.