forgeos-skill-security-review

forgeos-skill-security-review is a skill for Claude Code from Nolane-x/forge-os. It costs 29 tokens per session (385 once invoked), scanned A, original, MIT.

A security review checklist for agent skills before they are made available through ForgeOS. It examines the complete skill, its referenced files, commands, permissions, and possible handling of sensitive data.

In plain words
What is it for?
Use it to verify a skill's identity, inspect shell and network commands, map requested capabilities, and decide whether to approve, restrict, or quarantine it.
Why use it?
It can reveal hidden execution, credential access, data exposure, destructive actions, or instructions that conflict with host policy.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the forgeos plugin — 196 skills, 1 command, 1 agent, 1 MCP server shipped together

Good fit Use it to verify a skill's identity, inspect shell and network commands, map requested capabilities, and decide whether to approve, restrict, or quarantine it.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nolane-x/forge-os/forgeos-skill-security-review
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 Nolane-x/forge-os --skill forgeos-skill-security-review
Clone the repo
git clone --depth 1 https://github.com/Nolane-x/forge-os

Made for: Claude Code.

Or install forgeos, the plugin that ships this one along with the rest of its 196 skills, 1 command, 1 agent, 1 MCP server.

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 forgeos-skill-security-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/nolane-x/forge-os/forgeos-skill-security-review/github.svg)](https://agentmods.dev/skills/nolane-x/forge-os/forgeos-skill-security-review)
Your own site
<a href="https://agentmods.dev/skills/nolane-x/forge-os/forgeos-skill-security-review"><img src="https://agentmods.dev/badge/skills/nolane-x/forge-os/forgeos-skill-security-review/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 forgeos-skill-security-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/nolane-x/forge-os/forgeos-skill-security-review"><img src="https://agentmods.dev/badge/skills/nolane-x/forge-os/forgeos-skill-security-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 385 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00029 $0.00385
Opus 5 $0.00015 $0.00192
Sonnet 5 $0.00006 $0.00077
Haiku 4.5 $0.00003 $0.00038

Measured 9d ago against content hash 7153dab1a7cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

forgeos-skill-security-review scanned grade A with 1 finding 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 9d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

5. Examine install commands, package lifecycle hooks, downloaded binaries, encoded payloads, and `curl` or `wget` pipelines.
examples/skill-intake-kit-2026-07-28/forgeos-skill-security-review/SKILL.md · 33 lines

What it actually says

ForgeOS Skill Security Review

Review the whole skill folder, not only its title and description.

Review sequence

  1. Compare repository owner, canonical URL, snapshot reference, declared name, and description for identity mismatches.
  2. Read SKILL.md, all linked Markdown references, and every command example as potentially executable instructions.
  3. Map requested actions to explicit capabilities: filesystem read/write, shell, network, secrets, browser, messaging, financial action, deployment, deletion, and account administration.
  4. Identify indirect behavior such as reading .env, SSH keys, cloud credentials, browser profiles, clipboard data, or private documents before an outbound request.
  5. Examine install commands, package lifecycle hooks, downloaded binaries, encoded payloads, and curl or wget pipelines.
  6. Check whether the skill tells the model to override host policy, conceal actions, avoid confirmation, or treat untrusted content as authority.
  7. Require a narrower alternative whenever a requested permission exceeds the documented task.

Decision rules

  • Quarantine: instruction override, credential exfiltration, hidden remote execution, destructive root operations, deliberate concealment, or unverifiable origin.
  • Review: legitimate but consequential external writes, shell use, network use, credential access, unknown license, weak description, or excessive context.
  • Accepted candidate: clear purpose, bounded permissions, no critical finding, compatible license, useful verification steps, and successful task benchmark.

Verification

Write findings with file path, short excerpt, severity, and required mitigation. A clean regex scan is never sufficient evidence by itself.

Failure handling

When intent remains ambiguous, keep the skill in review. Never resolve uncertainty by granting broader permissions.

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. 9d ago First seen · 33 lines · 29 tokens per session scan A 7153dab1a7cc

Subscribe to this mod's changes

forgeos-skill-security-review is a skill published in the GitHub repository Nolane-x/forge-os (10 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 385 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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