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.
npx skills add j4flmao/agent-skills --skill smart-contract-securitygit clone --depth 1 https://github.com/j4flmao/agent-skillsWrote 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.
[](https://agentmods.dev/skills/j4flmao/agent-skills/smart-contract-security)<a href="https://agentmods.dev/skills/j4flmao/agent-skills/smart-contract-security"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/smart-contract-security/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.
<a href="https://agentmods.dev/skills/j4flmao/agent-skills/smart-contract-security"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/smart-contract-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00019 | $0.00277 |
| Opus 5 | $0.00010 | $0.00138 |
| Sonnet 5 | $0.00004 | $0.00055 |
| Haiku 4.5 | $0.00002 | $0.00028 |
Grade A, and why
Smart Contract Security 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 8d 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.
What it actually says
Smart Contract Security
Reentrancy Guards
Use the Checks-Effects-Interactions pattern and OpenZeppelin's ReentrancyGuard.
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
contract Vault is ReentrancyGuard {
mapping(address => uint) public balances;
function withdraw() external nonReentrant {
uint bal = balances[msg.sender];
require(bal > 0, "No balance");
balances[msg.sender] = 0; // Effect
(bool success, ) = msg.sender.call{value: bal}(""); // Interaction
require(success, "Transfer failed");
}
}
Flashloan Attack Prevention
Use decentralized oracles (Chainlink) or TWAP (Uniswap V3) to prevent price manipulation.
Security Audit Workflow
%%{init: {"theme": "default", "flowchart": {"useMaxWidth": true}}}%%
flowchart TD
A[Source Code] --> B[Static Analysis (Slither)]
B --> C[Fuzzing (Echidna)]
C --> D[Formal Verification]
D --> E[Manual Code Review]
E --> F[Audit Report]
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.
- 8d ago First seen · 40 lines · 19 tokens per session scan A 7b53f12f71f8
Smart Contract Security is a skill published in the GitHub repository j4flmao/agent-skills (23 stars, last pushed 5d ago), licensed MIT. It adds 19 tokens to every session and 277 once invoked, about $0.0001 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 2026-09-03.
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