Chainlink Integration Patterns

What problem does it solve? Smart contracts integrating Chainlink services often contain subtle security flaws like missing staleness checks, wrong decimal handling, or absent L2 sequencer validation that lead to exploitable vulnerabilities. This Skill provides auditors with concrete detection patterns and secure code references for every major Chainlink service. ## Core Features & Use Cases - Price Feed Auditing: Detects missing freshness checks, zero-price validation, round completeness, and L2 sequencer uptime verification with heartbeat reference tables. - VRF Security Review: Identifies front-running risks, insufficient request confirmations, and missing commit-reveal patterns in randomness consumers. - CCIP and Automation Checks: Validates source chain and sender allowlisting in cross-chain messages, plus re-validation logic in Keeper performUpkeep functions. - Use Case: While auditing a lending protocol on Arbitrum, use this Skill to confirm the contract checks the Chainlink sequencer uptime feed and enforces a grace period before consuming price data. ## Quick Start Audit this Solidity contract's Chainlink price feed integration for stale price and sequencer downtime vulnerabilities.