iac-iam

iac-iam is a skill for Claude Code, Codex from senaykt/iac-security-scan-skills. It costs 102 tokens per session (11,111 once invoked), scanned A, original, MIT.

A security review of AWS identity and access policies in Infrastructure-as-Code. Identity and access management, or IAM, controls who and what may use cloud resources.

In plain words
What is it for?
Use it to find wildcard permissions, privilege-escalation paths, unsafe role assumptions, cross-account risks, overprivileged workload roles, and lateral-movement opportunities.
Why use it?
Overly broad permissions, risky trust rules, and role-abuse paths can let an attacker gain more access or move to other systems. The review considers how multiple AWS policy types work together.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to find wildcard permissions, privilege-escalation paths, unsafe role assumptions, cross-account risks, overprivileged workload roles, and lateral-movement opportunities.

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Install with agentmods
npx agentmods add skills/senaykt/iac-security-scan-skills/iac-iam
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add senaykt/iac-security-scan-skills --skill iac-iam
Clone the repo
git clone --depth 1 https://github.com/senaykt/iac-security-scan-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for iac-iam

README.md
[![agentmods](https://agentmods.dev/badge/skills/senaykt/iac-security-scan-skills/iac-iam/github.svg)](https://agentmods.dev/skills/senaykt/iac-security-scan-skills/iac-iam)
Your own site
<a href="https://agentmods.dev/skills/senaykt/iac-security-scan-skills/iac-iam"><img src="https://agentmods.dev/badge/skills/senaykt/iac-security-scan-skills/iac-iam/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for iac-iam

Your own site · 80×15
<a href="https://agentmods.dev/skills/senaykt/iac-security-scan-skills/iac-iam"><img src="https://agentmods.dev/badge/skills/senaykt/iac-security-scan-skills/iac-iam.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11,111 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00102 $0.11111
Opus 5 $0.00051 $0.05555
Sonnet 5 $0.00020 $0.02222
Haiku 4.5 $0.00010 $0.01111

Measured 11d ago against content hash 68f5ea91005d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

iac-iam scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/iac-iam/SKILL.md · 631 lines

How it starts

The opening of the file, as written. The whole thing — 631 lines — stays where its author put it; the contents beside it link to each section on GitHub.

iac-iam

ROLE

You are a senior IAM security reviewer combining three perspectives in every analysis:

  1. AWS IAM security expert — You understand the full IAM evaluation logic (identity policies, resource policies, SCPs, permission boundaries, session policies), the difference between Allow and NotAction, the semantics of iam:PassRole, condition keys, aws:PrincipalOrgID, aws:SourceArn, aws:SourceAccount, session tags, and the subtle ways policies compose. You know which API calls are dangerous in isolation and which become catastrophic when chained.

  2. Cloud red team operator — You think in attack paths, not isolated findings. You ask: "If I land on this resource, what can I do? What can I become? Where can I go next? What can I persist as?" You know the canonical privilege escalation primitives (the Bishop Fox / Rhino Security taxonomy and its modern extensions) and you reason about chains across services.

  3. DevSecOps reviewer — You understand that engineering velocity matters. You distinguish between "academically risky" and "actually exploitable given this codebase's context." You write findings developers act on, not findings they ignore.

You are explicitly NOT a regex-based linter. Shallow rule-based logic (e.g. "flag any * in Action") is below your bar. You reason about what a policy lets a principal actually do, who can become that principal, and what they reach from there.

OBJECTIVE

Given normalized IaC representation from iac-analysis (and optionally raw Terraform/CloudFormation/CDK/Pulumi/SAM/Serverless sources), produce a high-signal, attack-path-aware set of IAM findings that:

  • Identify dangerous permissions, trust relationships, and escalation primitives.
  • Compose primitives into named attack chains across resources.
  • Quantify exploitability and blast radius using surrounding context (internet exposure, workload type, data sensitivity, environment).
  • Suppress noise from intentional, well-scoped, or boundary-constrained patterns.
  • Emit machine-readable findings that downstream skills (iac-correlate, iac-report, iac-threat-model) can consume and cross-reference.

Read the full file on GitHub · 631 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 631 lines · 102 tokens per session scan A 68f5ea91005d

Subscribe to this mod's changes

iac-iam is a skill published in the GitHub repository senaykt/iac-security-scan-skills (48 stars, last pushed 3mo ago), licensed MIT. It adds 102 tokens to every session and 11,111 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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