Blockchain Expert

This gives Claude solid grounding in blockchain development, from fundamentals like consensus mechanisms and cryptography through to production Solidity code. The skill includes working examples of ERC20 tokens with minting controls, a staking pool with reward calculations, and a simplified AMM implementation using the constant product formula. It's useful when you're building smart contracts and want help with security patterns, gas optimization, or DeFi mechanics without explaining what a reentrancy guard is. The code samples are OpenZeppelin-based and follow modern Solidity patterns, so you're not getting outdated or unsafe examples. Good for both learning blockchain concepts and getting assistance with actual Web3 development work.

skills.sh installs: 294
GitHub stars: 44
last updated: Aug 21, 2026

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Install

$ npx -y skills add personamanagmentlayer/pcl --skill blockchain-expert --agent claude-code

Installs into .claude/skills of the current project.

Files

Blockchain Expert

Expert guidance for blockchain development, smart contracts, Web3 applications, DeFi protocols, and cryptocurrency systems.

Core Concepts

Blockchain Fundamentals

Distributed ledger technology
Consensus mechanisms (PoW, PoS, PoA)
Cryptographic hashing
Public/private key cryptography
Transaction validation
Block structure and chain

Smart Contracts

Solidity programming
Gas optimization
Security patterns
Upgradeable contracts
Testing and auditing
Contract interactions

Web3 & DeFi

Decentralized applications (dApps)
DeFi protocols (AMM, lending, staking)
NFTs and token standards
Layer 2 solutions
Cross-chain bridges
Wallet integration

Smart Contract Development

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract SimpleToken is ERC20, Ownable, ReentrancyGuard {
    uint256 public constant MAX_SUPPLY = 1000000 * 10**18;

    mapping(address => bool) public minters;

SKILL.md on GitHub