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Web3 Smart Contract And DeFi Development

blockchain-developer

sickn33/antigravity-awesome-skills

A comprehensive guide for building production-grade Web3 applications, smart contracts, and decentralized systems. Covers expertise in DeFi protocols, NFT platforms, DAOs, cross-chain interoperability, and advanced smart contract security patterns (Solidity, Rust). Ideal for developers building complex, resilient decentralized finance (DeFi) and enterprise-grade blockchain solutions.

Comprehensive Web3 Smart Contract Testing

sickn33/antigravity-awesome-skills

Master advanced testing strategies for smart contracts using industry-leading frameworks like Hardhat and Foundry. This skill covers unit testing, integration testing, gas optimization analysis, fuzzing for edge cases, and simulating real-world mainnet interactions via forking. Ideal for ensuring the security and reliability of decentralized applications (DApps).

Solana AI Agent Marketplace Tool

sickn33/antigravity-awesome-skills

Connects to the MAXIA AI-to-AI marketplace on the Solana blockchain. This tool allows users to discover, buy, and sell AI services directly between decentralized agents. Features include comprehensive crypto intelligence, such as sentiment analysis and trending data; DeFi yield tracking; Web3 wallet security analysis (e.g., rug detection); and real-time GPU pricing, making it a comprehensive hub for Web3 AI interactions.

Node.js Ethereum Hashing Fix

nodejs-keccak256

affaan-m/everything-claude-code

Ensures Node.js projects compute Ethereum Keccak-256 hashes instead of incorrect SHA3-256 by guiding developers to use ethers/viem/web3 helpers, preventing selector, signature, storage-slot, and address derivation bugs while easing audits.

Alchemy Hardhat Web3 Development Setup

alchemy-local-dev-loop

jeremylongshore/claude-code-plugins-plus-skills

A comprehensive guide to setting up a full-cycle local Web3 development workflow. This skill utilizes Alchemy as the RPC provider, Hardhat for local unit testing, and integrates Mainnet forking and Sepolia testnet deployment. It covers initializing the project, configuring smart contract interactions, and implementing advanced testing patterns.

Upgrade Alchemy SDK And Web3 Migration Guide

alchemy-upgrade-migration

jeremylongshore/claude-code-plugins-plus-skills

A comprehensive guide for migrating code from deprecated libraries like alchemy-web3 to the modern alchemy-sdk (v3). This resource details handling breaking changes, understanding new API namespaces (core, nft, ws), and updating web3 interactions to ensure seamless blockchain functionality.

NFT & Smart Contract Interaction Workflow

alchemy-core-workflow-b

jeremylongshore/claude-code-plugins-plus-skills

A comprehensive workflow for building NFT collection explorers and interacting with smart contracts using Alchemy's robust APIs. It covers fetching detailed NFT metadata (including OpenSea data and floor price), batch processing metadata, reading standard contract states (like ERC-20 balances), and verifying NFT ownership. Ideal for developing advanced Web3 applications, marketplaces, and data dashboards.

Alchemy Web3 Quick Start Examples

alchemy-hello-world

jeremylongshore/claude-code-plugins-plus-skills

This guide provides minimal, working examples using the Alchemy SDK for foundational Web3 development. Learn essential blockchain interactions, including checking ETH balances, fetching NFT collections for a wallet, retrieving ERC-20 token balances, and querying the latest block information. Ideal for developers starting out or testing their blockchain infrastructure.

Alchemy Rate Limiting and Throttling Utility

alchemy-rate-limits

jeremylongshore/claude-code-plugins-plus-skills

A utility designed for robust blockchain interactions using the Alchemy API. It implements CU-aware throttling based on Compute Unit costs, manages concurrent requests, and includes advanced retry logic for handling 429 Too Many Requests errors. Ideal for optimizing high-volume, reliable Web3 applications that must adhere to strict API rate limits and usage budgets.

Alchemy CI/CD for Web3 Development

alchemy-ci-integration

jeremylongshore/claude-code-plugins-plus-skills

A comprehensive guide and implementation for setting up Continuous Integration and Continuous Deployment (CI/CD) pipelines for dApps powered by Alchemy. It utilizes GitHub Actions to automate critical Web3 workflows, including running Hardhat tests against a mainnet fork, verifying smart contract integrity, and securely deploying to testnets like Sepolia. Features built-in key exposure scanning for robust security.

Troubleshooting Alchemy Web3 API Errors

alchemy-common-errors

jeremylongshore/claude-code-plugins-plus-skills

A comprehensive guide for diagnosing and fixing common errors encountered when using the Alchemy SDK and Web3 APIs. Covers issues such as authentication failures (401/403), rate limits (429), invalid parameters, RPC failures, and specific NFT/Enhanced API errors. Ideal for developers integrating blockchain functionalities.

Building Comprehensive Web3 Portfolio Tracker

alchemy-core-workflow-a

jeremylongshore/claude-code-plugins-plus-skills

Develop a complete, multi-chain wallet portfolio tracker using Alchemy's Enhanced APIs. This workflow aggregates ETH balances, ERC-20 token holdings, NFT assets (ERC-721/1155), and transaction history across major chains (Ethereum, Polygon, Arbitrum, Optimism, Base). Ideal for building sophisticated decentralized applications (dApps) and comprehensive Web3 dashboards.

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