A security review method for smart contracts: programs that manage rules and assets on a blockchain. It examines Solidity, Vyper, and Rust/Anchor contracts for exploitable flaws.

Use it to audit contracts, review pull requests, investigate reentrancy and access-control issues, and assess attacks involving transaction ordering, economics, or price oracles.

Smart-contract bugs can let attackers bypass permissions, withdraw assets, manipulate prices, or interfere with execution. This method provides a structured way to look for those risks.

sc-audit — Skill for Claude Code by OneDro1d

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 OneDro1d/dark-factory --skill sc-audit

Clone the repo

git clone --depth 1 https://github.com/OneDro1d/dark-factory

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/onedro1d/dark-factory/sc-audit/github.svg)](https://agentmods.dev/skills/onedro1d/dark-factory/sc-audit)

Your own site

<a href="https://agentmods.dev/skills/onedro1d/dark-factory/sc-audit"><img src="https://agentmods.dev/badge/skills/onedro1d/dark-factory/sc-audit/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/onedro1d/dark-factory/sc-audit"><img src="https://agentmods.dev/badge/skills/onedro1d/dark-factory/sc-audit.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 1,995 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.

Model	Per session	Once invoked
Fable 5.1	$0.00102	$0.01995
Opus 5	$0.00051	$0.00997
Sonnet 5	$0.00020	$0.00399
Haiku 4.5	$0.00010	$0.00199

Measured 9d ago against content hash c857a4399de5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

sc-audit 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 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.

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.

skills/sc-audit/SKILL.md · 212 lines

How it starts

The opening of the file, as written. The whole thing — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Smart Contract Security Auditor. Be skeptical, methodical, and evidence-driven. Optimize for finding real exploitable issues and communicating them clearly with actionable fixes.

Treat $ARGUMENTS as the audit scope (files, modules, or PR). If unclear, infer likely scope and state assumptions.

Audit Methodology (Tight Loop)

Detect Stack & Layout — do this before scoping, not after.

Framework	Indicators
Foundry	`foundry.toml`, `src/`, `forge`
Hardhat	`hardhat.config.js/ts`, `contracts/`
Truffle	`truffle-config.js`, `migrations/`
Anchor (Rust)	`Anchor.toml`, `programs/`
Vyper	`.vy` files

The rest of this skill's tooling section assumes Foundry. That assumption is usually right and occasionally wrong, and when it is wrong every later command fails for a reason that looks like a broken repo rather than a wrong toolchain. Detect first, then read the tooling section as the Foundry case rather than the only case.

Scope & Assumptions
- In-scope contracts, deployment model, privileged actors, upgradeability, dependencies.
- Threat model: attacker capabilities, trust boundaries, external integrations (oracles, bridges, tokens).
Architecture Pass
- Identify assets, invariants, entrypoints, admin powers, upgrade paths, pausing, emergency controls.
Attack Surface Mapping
- External/public functions, callbacks (ERC777/721 hooks), receive/fallback, delegatecalls, external protocols.
Deep Dives by Category
- Access control, accounting, auth/signatures, reentrancy, oracle manipulation, MEV, DoS/griefing, upgrade safety.
Exploit Confirmation
- For each suspected issue: build a minimal PoC scenario, transaction sequence, and expected outcome.
Fix Validation
- Review patch correctness; ensure it doesn't introduce new issues; add regression tests.
Report
- Concise executive summary + prioritized findings with reproduction and remediation.

Read the full file on GitHub · 212 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.

9d ago First seen · 212 lines · 102 tokens per session scan A c857a4399de5

Subscribe to this mod's changes

sc-audit is a skill published in the GitHub repository OneDro1d/dark-factory (0 stars, last pushed yesterday), licensed Apache-2.0. It adds 102 tokens to every session and 1,995 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 2026-09-01.

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