eth-skills

Ethereum Skills

The missing knowledge between AI agents and production Ethereum.

18 skills that teach AI agents how to build, deploy, and interact with Ethereum. Corrects stale training data, provides real addresses, real gas prices, and production patterns.

Works with Claude Code, Cursor, Codex, Windsurf, Gemini CLI, and 40+ agents.

Install

CLI (recommended):

npx skills add andginja/ethskills

Claude Code plugin:

/plugin marketplace add andginja/ethskills

Git clone:

git clone https://github.com/andginja/ethskills.git .agents/skills/ethskills

Skills (18)

Planning & Architecture

Skill	Description
ship	End-to-end dApp guide — from idea to deployed production app. Fetch this first.
why-ethereum	Why Ethereum — Pectra/Fusaka upgrades, honest tradeoffs, the AI agent angle
concepts	Essential mental models — "nothing is automatic," incentive design, the hyperstructure test
layer-2s	L2 landscape — Arbitrum, Optimism, Base, zkSync. When to use which.

Smart Contracts

Skill	Description
standards	ERC-20, ERC-721, ERC-1155, ERC-8004 (agent identity), EIP-7702, x402
security	Solidity security — token decimals, reentrancy, oracle manipulation, pre-deploy checklist
testing	Foundry testing — unit, fuzz, fork, invariant. What LLMs get wrong.
building-blocks	DeFi legos — Uniswap V4 hooks, Aave flash loans, ERC-4626 vaults, composability

Infrastructure

Skill	Description
tools	Foundry, Scaffold-ETH 2, Blockscout MCP, x402 SDKs, abi.ninja
wallets	EOAs, Safe multisig, account abstraction, EIP-7702, key safety for agents
gas-costs	Current gas prices, mainnet vs L2 cost tables, fee settings
contract-addresses	Verified addresses for Uniswap, Aave, Chainlink, Safe, ENS, and more
indexing	Events, The Graph, Dune, Multicall3 — how to read onchain data

Frontend & Deployment

Skill	Description
orchestration	Three-phase build system for Scaffold-ETH 2 dApps
frontend-ux	Button loaders, three-button approval flow, Address components, USD values
frontend-playbook	Fork mode, IPFS deployment, Vercel config, ENS setup
qa	Pre-ship audit checklist — give to a separate reviewer agent
audit	Deep EVM audit — 500+ checklist items across 19 domains

What to Fetch by Task

I'm doing...	Fetch these skills
Planning a new dApp	ship, concepts, layer-2s
Writing Solidity	standards, building-blocks, contract-addresses, security
Testing contracts	testing
Building a frontend	orchestration, frontend-ux, tools
Deploying to production	wallets, frontend-playbook, gas-costs
Reviewing a finished dApp	qa
Auditing a smart contract	audit
Building AI agent infra	standards, wallets, tools

Why This Exists

Your AI agent's training data about Ethereum is stale. Gas prices are 100-600x lower than it thinks. EIP-7702 shipped. ERC-8004 exists. x402 is production-ready. Polygon zkEVM is being shut down. Foundry replaced Hardhat.

These skills correct the misconceptions and provide production-ready knowledge.

License

MIT