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 personamanagmentlayer/pcl --skill web3-expertgit clone --depth 1 https://github.com/personamanagmentlayer/pclWrote 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/personamanagmentlayer/pcl/web3-expert)<a href="https://agentmods.dev/skills/personamanagmentlayer/pcl/web3-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/web3-expert/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/personamanagmentlayer/pcl/web3-expert"><img src="https://agentmods.dev/badge/skills/personamanagmentlayer/pcl/web3-expert.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 | $0.00066 | $0.01284 |
| Opus 5 | $0.00033 | $0.00642 |
| Sonnet 5 | $0.00013 | $0.00257 |
| Haiku 4.5 | $0.00007 | $0.00128 |
Grade A, and why
web3-expert 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 3d 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 — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web3 Expert
Build production-ready Web3 applications including smart contracts, dApps, DeFi protocols, and decentralized storage solutions.
Learning Objectives
- Master smart contract development with Solidity
- Build decentralized applications (dApps)
- Implement DeFi protocols and mechanisms
- Integrate Web3.js and ethers.js libraries
- Deploy and interact with IPFS for decentralized storage
Prerequisites
- Strong JavaScript/TypeScript fundamentals
- Understanding of blockchain concepts
- Knowledge of cryptographic principles
- Familiarity with Ethereum ecosystem
Core Concepts
Smart Contracts
Self-executing code deployed on blockchain networks that automatically enforce agreements without intermediaries. Written in Solidity for EVM-compatible chains, they enable trustless, transparent, and immutable transactions.
Decentralized Applications (dApps)
Applications with backend logic running on decentralized networks rather than centralized servers. Frontend interfaces interact with smart contracts through Web3 libraries, providing censorship-resistant and transparent functionality.
DeFi (Decentralized Finance)
Financial instruments and protocols built on blockchain without traditional intermediaries. Includes lending/borrowing, decentralized exchanges (DEXs), yield farming, liquidity pools, and automated market makers (AMMs).
Web3 Libraries
JavaScript/TypeScript libraries (Web3.js, ethers.js) that enable interaction with Ethereum nodes, signing transactions, reading blockchain state, and connecting wallet providers like MetaMask.
IPFS (InterPlanetary File System)
Peer-to-peer distributed file system for decentralized storage. Content-addressed storage ensures immutability and enables efficient distribution without centralized servers.
Best Practices
Smart Contract Development
- Follow checks-effects-interactions pattern to prevent reentrancy
- Use OpenZeppelin contracts for standard implementations
- Implement comprehensive access controls and pausability
- Always validate inputs and handle edge cases
- Emit events for all state changes for frontend tracking
- Use SafeMath or Solidity 0.8+ for overflow protection
- Conduct thorough testing and external audits before mainnet
What ships with it
1 file 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.
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.
- 3d ago First seen · 189 lines · 66 tokens per session scan A cd41c1a1f180
web3-expert is a skill published in the GitHub repository personamanagmentlayer/pcl (40 stars, last pushed yesterday), licensed Apache-2.0. It adds 66 tokens to every session and 1,284 once invoked, about $0.0003 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 2026-09-05.
Other skills, from other repositories
Web3 & Blockchain Development
Production-grade Web3 development with Solidity smart contracts, ethers.js/web3.js integration, DApp architecture, security patterns, and AI-enhanced blockchain development (ChatWeb3, Aider + Gemini 2024).
analyzing-ethereum-smart-contract-vulnerabilities
Perform static and symbolic analysis of Solidity smart contracts using Slither and Mythril to detect reentrancy, integer overflow, access control, and other vulnerability classes before deployment to Ethereum mainnet.
analyzing-ethereum-smart-contract-vulnerabilities
Perform static and symbolic analysis of Solidity smart contracts using Slither and Mythril to detect reentrancy, integer overflow, access control, and other vulnerability classes before deployment to Ethereum mainnet.
solidity-language-docs
Solidity 0.8.36 — smart contracts, types, functions, modifiers, events, inheritance, libraries, assembly, ABI.
analyzing-ethereum-smart-contract-vulnerabilities
A security-analysis guide for Solidity smart contracts, which are programs that run on the Ethereum blockchain. It uses Slither and Mythril to inspect contract code and execution paths for vulnerabilities.
analyzing-ethereum-smart-contract-vulnerabilities
Perform static and symbolic analysis of Solidity smart contracts using Slither and Mythril to detect reentrancy, integer overflow, access control, and other vulnerability classes before deployment to Ethereum mainnet.