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sc-audit

Deep security audit of a smart-contract repo OR a live on-chain contract by address - detect Solidity, model the protocol invariants and trust boundaries first, run Slither (best-effort) plus a bounded agentic pass that hunts for a path breaking each invariant, triage, adversarially verify, prove with a fuzzer, and drive each finding through the shared responsible-disclosure routing. The dedicated contract arm split out of vuln-scanner.

skills/sc-audit/SKILL.md

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Last checked
Nov 6, 2026

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Repository last updated
Nov 5, 2026
License
MIT

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> **${var}** - Target selector. Four forms:
> - `` (empty) -> auto-select the day's fresh feed target, audit **only if it contains Solidity**, else exit clean. See §S1 for the selection order (an optional `sc-targets.json` ledger, else the `github-trending` feed).
> - `owner/repo` -> audit that GitHub repo (e.g. `Uniswap/v4-core`, `aave/aave-v3-origin`).
> - `<chain>:0x<address>` -> **on-chain mode**: audit a **live deployed contract by address**. It fetches the verified source from the block explorer (Etherscan V2) or Sourcify, materializes it as a Foundry project, and runs the same pipeline - plus on-chain context (proxy/implementation, owner/admin, funds at risk). `chain` in `eth`/`base`/`arbitrum`/`optimism`/`polygon`/`bsc`/... (bare `0x<address>` defaults to `eth`). Examples: `base:0x4200000000000000000000000000000000000006`, `eth:0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2`. On-chain findings are **operator-gated** - never auto-filed/auto-emailed (see §S7). See §S1/§S2.
> - `fixture:<name>` -> **local regression mode**: audit the bundled fixture at `skills/sc-audit/fixtures/<name>/` (e.g. `fixture:vault`). No fork, no dedup, no disclosure - a self-contained way to exercise the whole pipeline including the fuzz arm, with no external repo. See §S1/§S2.

Today is ${today}. Read `memory/MEMORY.md` and the last 30 days of `memory/logs/` before starting.

## Why this skill exists

Smart-contract bugs are logic and economics, not syntax. Slither matches known static patterns; it is weak on **access control, protocol invariants, oracle/price manipulation, rounding/precision, upgradeability storage collisions, and cross-contract reentrancy** - the classes that actually drain funds, and where exploitation on-chain is immediate and irreversible. That whole class is what an agentic reviewer catches by reading the source and reasoning about who can call what and which invariant breaks.

This skill is the **contract arm split out of `vuln-scanner`**. vuln-scanner detects Solidity and hands the repo here rather than running Slither inline; this skill owns the deep audit and then routes findings through vuln-scanner's shared disclosure machinery. It does **not** duplicate the disclosure/PVR/email logic - see §S7.