Browse AI context skills for Web3 development
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Web3 SDK Migration Guide (ethers v5โv6, wagmi v1โv2, web3.js v1โv2) Overview Web3 SDKs have undergone major breaking changes. AI models are frequently trained o
DeFi Core Mathematics AMM: Constant Product Formula (Uniswap V2) Core Formula: x y = k (x, y are the quantities of two tokens, k is a constant) Price Calculatio
Arithmetic & Precision Vulnerability Patterns Distilled from 300+ Code4rena audit findings. Arithmetic bugs are among the hardest to spot during review because
Reentrancy & Access Control Vulnerability Patterns Distilled from 300+ Code4rena audit findings. These two vulnerability classes account for a disproportionate
Layer 2 Technology Comparison One-Line Positioning | L2 | Positioning | Technology | Ecosystem | |----|------|------|------| | Arbitrum One | Largest TVL, DeFi
ethers.js vs viem vs wagmi Selection Guide Positioning | Library | Positioning | Use Cases | |----|------|------| | ethers.js v6 | Full-featured EVM library, lo
Ethereum Standards What You Probably Got Wrong ERC-8004 exists. Deployed January 29, 2026 โ onchain agent identity registry. You almost certainly don't have thi
ENS (Ethereum Name Service) โ name resolution, registration via commit-reveal, text/address records, reverse resolution, avatar retrieval, subdomains, and Name
ERC NFT Standards Guide (ERC-721, ERC-1155, ERC-2981, ERC-4907) Overview This guide covers the core NFT standards on Ethereum and their extensions. Understandin
AMM & Lending Protocol Design Patterns Distilled from DeFiLlama data covering the top AMM protocols ($8.7B TVL combined: Uniswap V3 $1.71B, Curve $1.85B, Pancak
Ethereum Protocol What You Probably Got Wrong "Ethereum is a static platform." No. Ethereum upgrades roughly every 6-12 months via hard forks. Features you read
Overview Ethereum is the world's leading smart contract platform. This skill covers core development patterns, common AI mistakes, and best practices for buildi
Ethereum Ecosystem Hackathon โ Decision Context > Updated 2026-03-31 > Source: ETHGlobal event data, Gitcoin public analytics, community post-mortems For AI Age
Building Blocks (DeFi Legos) What You Probably Got Wrong DeFi TVL: Check [DeFi Llama](https://defillama.com/chain/Ethereum) for current Ethereum DeFi TVL. If yo
This documentation is designed to help you build with [Ethereum](/). It covers Ethereum as a concept, explains the Ethereum tech stack, and documents advanced t
Onchain Data & Indexing What You Probably Got Wrong You try to query historical state via RPC calls. You can't cheaply read past state. ethcall reads current st
Smart Contract Testing Strategy Testing Pyramid โโโโโโโโโโโโโโโ โ Fork Test โ โ Tests against real on-chain state โโดโโโโโโโโโโโโโโดโ โ Invariant Test โ โ System
ERC Interface & Extension Standards (EIP-165, EIP-173, ERC-3156) Overview This guide covers Ethereum's interface detection, ownership, flash loan, payable token
NFT Tech Stack Complete Guide Storage Solutions Comparison | Solution | Cost | Permanence | Decentralized | Recommended For | |------|------|--------|---------|
Wallets on Ethereum What You Probably Got Wrong EIP-7702 is live. Since Pectra (May 7, 2025), regular EOAs can delegate execution to smart-contract code without
dApp Orchestration What You Probably Got Wrong SE2 has specific patterns you must follow. Generic "build a dApp" advice won't work. SE2 auto-generates deployedC
Frontend UX Rules What You Probably Got Wrong "The button works." Working is not the standard. Does it disable during the transaction? Does it show a spinner? D
OpenZeppelin Contract Patterns Installation bash npm install @openzeppelin/contracts npm install @openzeppelin/contracts-upgradeable Upgradeable version ERC-20
Contract Addresses > CRITICAL: Never hallucinate a contract address. Wrong addresses mean lost funds. If an address isn't listed here, look it up on the block e
Ethereum guides Do you want to start your Ethereum journey? Our practical guides lead you step-by-step on getting started, and make it easier to navigate this n
Overview ESP (Ecosystem Support Program) is the Ethereum Foundation's (EF) official grant program that supports open-source work advancing the overall developme
Ethereum Improvement Proposals and ERC standards reference โ ERC-20, ERC-721, ERC-1155, ERC-4626, EIP-712, EIP-1559, EIP-2612, EIP-4337, EIP-4844, EIP-7702, ERC
Chainlink BUILD & Grants Complete Guide Two Main Programs 1. Chainlink BUILD Program Comprehensive support for early-stage projects (not just funding): - Priori
Why Ethereum What You Probably Got Wrong Terminology: You say "on-chain." The Ethereum community says "onchain" โ one word, no hyphen. Use "onchain" in all writ
Lido liquid staking โ stake ETH to receive stETH, wrap to wstETH for DeFi composability, manage withdrawal queue requests. Covers rebasing token pitfalls and co
Derivatives & Stablecoin Design Patterns Distilled from DeFiLlama data covering derivatives protocols ($2.39B TVL: Jupiter $877M, Hyperliquid HLP $433M, Drift $
dApp QA โ Pre-Ship Audit This skill is for review, not building. Give it to a fresh agent after the dApp is built. The reviewer should: 1. Read the source code
Contract Upgrade Pattern Comparison Quick Overview of Three Mainstream Patterns | Pattern | Gas (Deploy) | Gas (Call) | Upgrade Authority | Complexity | Recomme
Ship a dApp What You Probably Got Wrong You jump to code without a plan. Before writing a single line of Solidity, you need to know: what goes onchain, what sta
EVM Smart Contract Audit A full audit system for any EVM contract. Runs parallel specialist agents against domain-specific checklists, synthesizes findings, and
Ethereum Development Tools What You Probably Got Wrong Blockscout MCP server exists: https://mcp.blockscout.com/mcp โ gives AI agents structured blockchain data
Wallet Connection UX Best Practices Comparison of the Three Main Libraries | Library | Maintainer | Built On | UI Style | Customizability | Recommended Use Case
DeFi is an open and global financial system built for the internet age โ an alternative to a system that's opaque, tightly controlled, and held together by deca
Account Abstraction (AA) Practical Guide EIP-4337 Core Concepts User โ UserOperation โ Bundler โ EntryPoint โ Smart Account (contract wallet) โ Paymaster (can s
Smart Contract Testing What You Probably Got Wrong You test getters and trivial functions. Testing that name() returns the name is worthless. Test edge cases, f
Compound Protocol Grants (CGP 2.0): Application Guide Based on real data from 126 applications (53 approved, 73 rejected) Source: Questbook platform โ "Compound
Multi-chain Comparison: TPS, Fees, Ecosystem, Dev Experience Overview Choosing the right chain is one of the first architectural decisions in a Web3 project. Th
Web2 to Web3 Developer Onboarding Guide Overview This guide translates Web2 concepts to Web3 equivalents and provides role-specific onboarding paths. Whether yo
L2 Development Guide L2 Types Optimistic Rollups (optimistic, 7-day withdrawal period): Arbitrum One, Optimism, Base ZK Rollups (zero-knowledge, fast withdrawal
Core Ethereum development concepts including gas mechanics, transaction types, storage layout, ABI encoding, and EVM execution model. Skill URL: https://raw.git
Full-stack dApp development framework โ npx create-eth@latest, Foundry/Hardhat monorepo, custom React hooks, contract hot reload, auto-generated debug page, thr
EigenLayer restaking protocol โ stake ETH and LSTs to secure AVSs (Actively Validated Services), operator registration and delegation, reward claiming, and slas
Ethereum Foundation ESP (Ecosystem Support Program) Application Guide What is ESP? EF ESP is the Ethereum Foundation's grant program for ecosystem builders, wit
Uniswap V3 Integration Guide Core Contract Addresses (Ethereum Mainnet) - SwapRouter02: 0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45 - NonfungiblePositionManager:
Hardhat Development Framework Guide Initialization bash npm install --save-dev hardhat npx hardhat init Select TypeScript project npm install --save-dev @nomicf
wagmi + viem Frontend Integration Installation bash npm install wagmi viem @tanstack/react-query Configuration Setup typescript // config.ts import { createConf
Foundry Development Framework Guide Installation bash curl -L https://foundry.paradigm.xyz | bash foundryup Project Structure my-project/ โโโ src/ Contracts โโโ
Smart Contract Security What You Probably Got Wrong "Solidity 0.8+ prevents overflows, so I'm safe." Overflow is one of dozens of attack vectors. The big ones t
Frontend Playbook What You Probably Got Wrong "I'll use yarn chain." Wrong. yarn chain gives you an empty local chain with no protocols, no tokens, no state. ya
Introduction to Web3 {#introduction} <div className="mt-4"> <ListenToPlayer slug="/web3/" /> </div> Centralization has helped onboard billions of people to the
Introduction to smart contracts {#introduction-to-smart-contracts} <div className="mt-4"> <ListenToPlayer slug="/smart-contracts/" /> </div> Smart contracts are
Ethereum Layer 2s What You Probably Got Wrong L2 costs: You think $0.01-2.00 per transaction. Reality: $0.001-0.003 for swaps, $0.0003 for transfers. After EIP-
Privacy Apps with Noir What You Probably Got Wrong "Use nargo prove and nargo verify." Those commands were removed. Nargo only compiles and executes. Proving an
How to create an Ethereum account Anyone can create an Ethereum account for free. You just need to install a crypto wallet app. Wallets create and manage your E
How to use a wallet Learn how to operate all the basic functions of a wallet. If you donโt have one yet, check out our [How to create an Ethereum account](/guid
How to revoke smart contract access to your crypto funds This guide will teach you how to view a list of all [smart contracts](/glossary/#smart-contract) you ha
How to swap tokens Are you tired of searching for an exchange that lists all your favorite tokens? You can swap most of the tokens using [decentralized exchange
How to bridge tokens to layer 2 If there is a lot of traffic on Ethereum, it can become expensive. One solution to this is to create new "layers": i.e., differe
Gitcoin Grants Active Rounds > โฐ Time-Sensitive Data (Updated Weekly) โ Last Updated: 2026-03-30 > Source: https://grants.gitcoin.co Currently Active: GG24 (Git
Oracle & Price Manipulation Vulnerability Patterns Distilled from 300+ Code4rena audit findings. Oracle-related vulnerabilities form the largest category of cri
Building Blocks (DeFi Legos) What You Probably Got Wrong DeFi TVL: Check [DeFi Llama](https://defillama.com/chain/Ethereum) for current Ethereum DeFi TVL. If yo
Logic Error Vulnerabilities Logic Error Vulnerabilities > Analysis of 12 real-world cases from Code4rena audit competitions (2022-2024) Vulnerability Overview L
ERC Account & Proxy Standards (ERC-4337, ERC-6551, EIP-1967) Overview This guide covers Ethereum's account and proxy infrastructure standards. These are critica
Solidity Gas Optimization Guide Storage Optimization (Maximum Gains) Variable Packing solidity // โ Bad: 3 slots (each slot is 32 bytes) uint256 a; // slot 0 ui
ERC Token Standards Guide (ERC-20, ERC-777, ERC-4626, ERC-2612) Overview This guide covers the four primary fungible token standards on Ethereum and when to use
Initialization & Proxy Vulnerability Patterns Distilled from 300+ Code4rena audit findings. Proxy and initialization patterns are foundational to modern DeFi โ
ERC Signature Standards (EIP-191, EIP-712, EIP-1271) Overview Ethereum signatures are fundamental to authentication, meta-transactions, gasless approvals, and s
MEV Protection and Flashbots Guide MEV Types Quick Reference | Type | Mechanism | Victim | Scale | |------|------|--------|------| | Sandwich Attack | Insert tr
Hardhat vs Foundry Selection Guide Core Differences at a Glance | Dimension | Hardhat | Foundry | |------|---------|---------| | Language | JavaScript/TypeScrip
Ethereum Concepts What You Probably Got Wrong "Smart contracts run automatically." No. Smart contracts cannot execute themselves. There is no cron job, no sched
Gas & Costs on Ethereum What You Probably Got Wrong Your gas estimate is 100-600x too high. Most LLMs confidently state gas is 10-30 gwei. Post-Fusaka (Dec 2025
Chainlink Integration Guide Installation bash npm install @chainlink/contracts Price Feeds (Most Commonly Used) solidity import "@chainlink/contracts/src/v0.8/i
Aave V3 Integration Guide Core Contracts (Ethereum Mainnet) - Pool: 0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2 - PoolAddressesProvider: 0x2f39d218133AFaB8F2B819