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 blockchain-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/blockchain-security)<a href="https://agentmods.dev/skills/j4flmao/agent-skills/blockchain-security"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/blockchain-security.svg" alt="Measured on agentmods" 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 | $0.00203 | $0.05325 |
| Opus 5 | $0.00102 | $0.02662 |
| Sonnet 5 | $0.00041 | $0.01065 |
| Haiku 4.5 | $0.00020 | $0.00532 |
Grade A, and why
blockchain-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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 545 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Blockchain Security
Purpose
Guide blockchain-specific security analysis covering smart contract auditing, DeFi threat modeling, economic security, incident response, formal verification, and bug bounty programs. Combines traditional security engineering with blockchain-specific risks like economic attack vectors, flash loans, oracle manipulation, and MEV.
Agent Protocol
Trigger
"blockchain security", "smart contract audit", "DeFi security", "DeFi threat model", "blockchain threat modeling", "audit methodology", "blockchain incident response", "emergency pause", "fork coordination", "bug bounty", "Immunefi", "Code4rena", "economic security", "game theory blockchain", "incentive analysis", "MEV security", "certora", "formal verification blockchain", "Halmos", "Scribble", "solidity security", "smart contract vulnerability", "blockchain exploit", "flash loan attack", "oracle manipulation", "reentrancy", "access control blockchain", "cross-chain security", "bridge security"
Input Context
- Smart contracts or protocol to analyze
- Platform (EVM/Solana/Cosmos/Cardano)
- Security objective (audit/threat model/incident response/pre-audit review)
- Codebase location and audit history
- Previous incidents or vulnerabilities
- TVL and risk exposure
Output Artifact
Security analysis including: threat model, vulnerability findings, economic analysis, verification approach, and remediation recommendations.
Response Format
- Threat model: assets, actors, attack vectors, trust assumptions, attack surface
- Audit approach: methodology, tools, timeline, expected coverage
- Economic analysis: incentive structures, game theory, exploit scenarios
- Security controls: mitigations, circuit breakers, monitoring
- Verification: formal properties, invariants, proof techniques
- Incident response: emergency plan, communication template
Completion Criteria
- Threat model identifies all trust assumptions and attack surfaces
- Vulnerability findings include severity, impact, likelihood, and remediation
- Economic analysis models incentive alignment and identifies exploit paths
- Formal verification specifies key invariants (solvency, access control, correctness)
- Emergency response plan covers: pause, communication, fork coordination, post-mortem
What ships with it
11 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.
- references/audit-methodology.md 7.4 KB
- references/blockchain-security-advanced.md 2.6 KB
- references/blockchain-security-fundamentals.md 2.4 KB
- references/bug-bounty-program.md 8.3 KB
- references/economic-security.md 6.4 KB
- references/formal-verification-deep.md 7.6 KB
- references/incident-response.md 7.9 KB
- references/reentrancy_attack_mitigation.md 454 KB
- references/smart_contract_auditing.md 454 KB
- references/smart-contract-security.md 3.1 KB
- references/threat-modeling.md 8.6 KB
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.
- 4d ago First seen · 545 lines · 203 tokens per session scan A c2a4c9956f71
blockchain-security is a skill published in the GitHub repository j4flmao/agent-skills (22 stars, last pushed yesterday), licensed MIT. It adds 203 tokens to every session and 5,325 once invoked, about $0.0010 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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