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Design and implement smart contracts as self-executing programmatic agreements on blockchain.
Passed 23 of 23 test cases with the skill, and 14 of 23 without it.
and 18 more in the full report
9 fixed14 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
We are designing a Solidity-based escrow contract for EVM where buyers deposit funds, sellers deliver goods, and an arbiter resolves disputes if needed. Please analyze this workflow and produce a JSON report containing: a 'contract' object (with contract name, function count, state variable count, and access roles), a 'security' object (listing audit status, design patterns used, and known risk areas), and a 'metadata' object (specifying platform, language, and estimated gas).
| Checked | Without skill | With skill |
|---|---|---|
| The response JSON uses the exact top-level keys contract, security, and metadata. | Passed | Passed |
| The contract object uses key name for contract name and functions for function count. | Missed | Passed |
| The metadata object contains estimated_gas as an integer value. | Missed | Passed |
The instructions your model reads when the skill loads.
Smart contracts are self-executing programs stored on a blockchain that automatically enforce agreement terms when conditions are met. Primarily written in Solidity (Ethereum/EVM) or Rust (Solana). Once deployed, code is immutable — bugs cannot be patched without migration. Security is critical as exploits are irreversible.
Trigger conditions:
When NOT to use:
IRON LAW: Deployed Smart Contracts Are IMMUTABLE — Bugs Are Permanent
Once deployed, contract code cannot be changed. A bug that loses funds
is IRREVERSIBLE. There is no "hotfix" or "rollback" (unless the
contract includes an upgrade proxy pattern). Security audit BEFORE
deployment is not optional — it is the only protection.
Define: contract purpose, participants, conditions, state variables, access controls. Determine: which logic MUST be on-chain vs which can be off-chain. Gate: Business logic specified, on-chain necessity justified.
Design:
Security patterns:
test cases passed, vs 14 / 23 without
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