# iac-security-scan-skills

Infrastructure-as-Code security scanner for Terraform and CloudFormation. Detects cross-domain attack paths and suggests minimal fixes to eliminate exposure points.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 314 installs · ★ 12
- Author: reason-machines
- License: LicenseRef-Unknown · policy=link-only · description only; the file stays with the author
- Source: https://github.com/reason-machines/security-skills/tree/HEAD/skills/iac-security-scan-skills/SKILL.md
- Updated: 2026-10-09
- HTML: https://affpapa.org/en/nevibecode/skills/iac-security-scan-skills

## What it does

This skill evaluates cloud definitions across Terraform and CloudFormation codebases. The workflow consists of three stages: mapping structural boundaries, scanning isolated domains concurrently (such as IAM, networking, storage, secrets, and logging), and aggregating cross-domain attack paths that link initial perimeter access to internal workloads.

Rather than stopping at isolated rule violations, the engine grades findings using a 0.0 to 1.0 confidence score and calculates the minimum-cut fix set required to disrupt attack graphs. Users can trigger complete audits, scoped runs for selected focus areas, or a single-pass fast scan tailored for pull requests.

Attack chain correlation requires selecting at least two domains during a scoped scan. Every output artifact is written to the local `iac-scan/` directory as Markdown summaries, an HTML dashboard, and CSV spreadsheets, which means adding that directory to `.gitignore` is necessary right away.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/security-skills --skill iac-security-scan-skills -a claude-code
```

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

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/security-skills --skill iac-security-scan-skills -a codex
```

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

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/security-skills --skill iac-security-scan-skills -a cursor
```

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

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install reason-machines/security-skills iac-security-scan-skills
```

2. **Manually: put the files in place**
- File: `.github/skills/iac-security-scan-skills/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add reason-machines/security-skills --skill iac-security-scan-skills -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/reason-machines/security-skills --path skills/iac-security-scan-skills
```

### Windsurf (Devin Desktop)

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

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add reason-machines/security-skills --skill iac-security-scan-skills -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/reason-machines/security-skills/tree/HEAD/skills/iac-security-scan-skills/SKILL.md

## When to use it
- detect privilege escalation opportunities in IAM policies and role assumptions
- trace multi-hop lateral movement paths spanning from public ingress to backend databases
- flag plaintext cloud credentials embedded inside deployment templates
- audit S3 buckets and data stores lacking backup locks or encryption
- produce an interactive HTML overview of infrastructure vulnerabilities

## Example prompts
- Run IaC security scan on the terraform/ directory
- Scan only IAM and network
- Generate security report from previous scan results

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From the same set: [reason-machines/security-skills](https://affpapa.org/en/nevibecode/by/reason-machines/security-skills.md) — 69 cards

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md