Individual skill
code-review-solidity
Security review of Solidity / EVM smart contracts — reentrancy, access control, arithmetic, and DeFi economic bugs. Load when reviewing a smart contract / web3 codebase or PR, on .sol source in scope, or "audit this contract". Signals: *.sol, foundry/hardhat, ERC-20/721, external calls, delegatecall, proxy patterns, price oracles.
skills/code-review/code-review-solidity/SKILL.md
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- Last checked
- Nov 7, 2026
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- Repository last updated
- Oct 14, 2026
- License
- MIT
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# Solidity / smart-contract review
## When it applies
Reviewing on-chain code (a protocol, a token, a bridge). Smart-contract bugs are usually
irreversible and directly financial, so the review bar is high and the classic patterns are
well known — start there, then look for economic/logic flaws unique to the protocol.
## Why it works
The EVM executes exactly as written with real money at stake: an external call can re-enter before
state updates, arithmetic wraps, and a missing modifier means anyone can call a privileged function.
Most losses trace to a small set of patterns a careful read (plus Slither/Mythril) will surface.
## Sinks & patterns (read, then reason about ordering and trust)
- **Reentrancy**: state changed *after* an external call/`.call{value:}`/token callback (ERC-777/721