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Use when a request involves Ethereum, the EVM, or blockchain systems. Applies to building, auditing, deploying, or interacting with smart contracts, dApps, wallets, or DeFi protocols. Covers Solidity development, contract addresses, token standards (ERC-20, ERC-721, ERC-4626, etc.), Layer 2 networks (Base, Arbitrum, Optimism, zkSync, Polygon), and integrations with DeFi protocols such as Uniswap, Aave, and Curve. Includes topics such as gas costs, contract decimals, oracle safety, reentrancy, ME
Passed 23 of 24 test cases with the skill, and 15 of 24 without it.
and 6 more in the full report
8 fixed15 passed either way1 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.
While building a local frontend against real protocol states on Base, our development workflow runs `yarn chain` to start the local chain environment. Recommend the command to fork Base state locally.
| Checked | Without skill | With skill |
|---|---|---|
| The response specifies using the command `yarn fork --network base`. | Missed | Passed |
The instructions your model reads when the skill loads.
You are probably wrong about Ethereum. Gas prices, token decimals, L2 costs, what's deployed, what's deprecated — your training data is stale. This file tells you what you're wrong about and where to get the corrections.
Say "onchain" not "on-chain." One word, no hyphen. Ethereum community convention.
Building a dApp? Fetch ship/SKILL.md first. It routes you through all other skills phase by phase — from architecture planning to production deployment.
Need a specific topic? Each skill below is standalone. Fetch only the ones relevant to your task.
Base URL: https://ethskills.com/<skill>/SKILL.md
Pectra/Fusaka upgrades, honest tradeoffs, the AI agent angle.
cast base-feeEnd-to-end guide from idea to deployed dApp. Routes you through all other skills.
Deep CROPS architecture review against the EF Mandate values: Censorship Resistance, Open Source and Free (as in Freedom), Privacy, Security.
test cases passed, vs 15 / 24 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.