Smart Contract Security Auditor
Audit smart contracts for vulnerabilities, optimize gas, and secure your code
What You Can Do
Perform comprehensive security reviews of smart contracts across EVM blockchains, identifying critical vulnerabilities, common attack vectors, and optimization opportunities. Claude analyzes your code against industry standards and OWASP guidelines, generating detailed audit reports with remediation guidance and gas optimization recommendations.
Features
Identifies reentrancy attacks, overflow/underflow, unchecked calls, and other security flaws with severity ratings
Pinpoints inefficient operations and suggests refactoring to reduce deployment and execution costs
Checks code against Solidity standards, OpenZeppelin patterns, and EVM best practices
Analyzes potential exploit scenarios and edge cases that could compromise the contract
Creates professional audit reports with findings, risk assessment, and prioritized recommendations
Evaluates readability, maintainability, and structural soundness with actionable improvements
Reviews contracts for version-specific issues and cross-chain deployment concerns
Example Output
Example 1: Vulnerability Finding
Reentrancy Vulnerability in withdraw() Function
- Severity: Critical
- Location: Line 42-45
- Description: External call precedes state update. Attacker can recursively call
withdraw()to drain contract funds. - Recommendation: Use Checks-Effects-Interactions pattern. Update state BEFORE external calls.
Example 2: Gas Optimization
Reduce Storage Reads in Loop
- Current: Loop reads
state.value1000x = ~2,100,000 gas - Optimized: Cache in memory = ~5,000 gas
- Savings: ~2,095,000 gas per transaction (99.8% reduction)
Example 3: Executive Summary
- Overall Risk: Medium
- Critical Issues: 1 (reentrancy)
- High Issues: 2 (unchecked calls, access control)
- Gas Optimization Potential: 30-40% cost reduction
What's Included
- SKILL.md: Complete security audit workflow with decision trees and vulnerability matrices
- Security Checklist Template: Pre-audit verification steps and scope definition
- Vulnerability Assessment Template: Structured format for documenting findings with CVSS scoring
- Gas Optimization Worksheet: Analysis framework for cost reduction opportunities
- Audit Report Template: Professional deliverable format with executive summary and remediation timeline
Who It's For
- Smart Contract Developers — Validate code before deployment and learn security best practices
- Security Auditors — Accelerate professional audit workflows and ensure comprehensive coverage
- DeFi Protocol Teams — Review contracts before testnet/mainnet launches to catch critical issues
- Blockchain Architects — Assess third-party contract integrations and system-level vulnerabilities
- Code Reviewers — Conduct detailed peer reviews with structured security feedback
Best For
- Pre-deployment security reviews of new contracts
- Vulnerability assessment of existing live contracts
- Gas optimization of high-transaction contracts to reduce user costs
- Security training and code review for development teams
- Compliance evaluation against standards (ERC-20, ERC-721, etc.)
You might also like
Turn project descriptions, timelines, and structured data into professional draw.io diagrams instantly. You can generate flowcharts, org charts, Gantt charts, swimlane diagrams, and process flows by describing what you need. Claude creates draw.io XML that you can open directly in the editor or modify further.
by skillslib
You can design culturally appropriate survey instruments tailored to international development contexts, analyze mixed-methods data by integrating quantitative findings with qualitative insights, and implement robust data quality management systems for your field operations. Claude helps you create survey templates with adaptive logic, develop validation protocols, and produce data quality reports that highlight issues before analysis begins.
by skillslib
You can evaluate whether products are viable remanufacturing candidates by conducting systematic disassembly analysis and identifying recovery opportunities. The skill helps you design efficient remanufacturing workflows, calculate ROI and environmental impact metrics (including embodied energy recovery of 85-90%), and create remanufacturability scorecards that guide design improvements and supply chain decisions.
by skillslib
You can diagnose warehouse bottlenecks using structured data analysis, then generate optimized layouts and flow improvements. The skill models space utilization, labor deployment, and throughput constraints to identify quick wins and long-term improvements, delivering quantified cost savings and performance gains for your specific facility.
by skillslib
You can systematically code qualitative data against your evaluation framework, surface patterns and themes across multiple responses, extract compelling impact stories with supporting evidence, and generate summary matrices that link narrative findings to your outcomes claims. This skill maintains analytical rigor while reducing the 40-60 hours typically spent manually reviewing transcripts and open-ended survey responses per evaluation cycle.
by skillslib
Get complete, ready-to-deploy lead magnets tailored to your ideal customer profile. Claude designs the concept, writes the persuasive copy, builds the email sequences, and creates deployment strategies that attract qualified prospects and build engaged lists fast. You'll capture 3-5x more subscribers with magnetic offers that actually resonate.
by skillslib
You can convert raw discovery call notes into polished, multi-section sales proposals that include executive summaries tailored to buyer personas, needs analysis mapped to your solution architecture, tiered pricing options with competitive positioning, ROI projections with financial justification, and realistic implementation timelines. The skill preserves personalization and strategic positioning while automating structural components, letting you respond to RFPs and time-sensitive opportunities without sacrificing quality or consistency.
by skillslib
This skill generates optimized facility layouts by analyzing material and personnel flow patterns, validating against operational constraints, and comparing multiple design options with quantified metrics. You provide your facility's dimensions, equipment locations, and operational requirements, and Claude produces detailed layouts with flow efficiency scores, space utilization analysis, and cost-benefit comparisons. Each layout option includes specific recommendations for improving throughput, reducing congestion points, and enhancing safety compliance.
by skillslib