ChainSentinel — Multi-Agent Web3 Security

ChainSentinel is an AI-powered Web3 security platform where a team of five autonomous agents collaborate through Band to audit smart contracts the way a real security firm would — except in minutes, not weeks. When a contract is submitted, the SecurityOrchestrator opens a Band room and dynamically recruits specialists: the ThreatAnalyst runs deep semantic and economic-attack analysis (flash loans, oracle manipulation, reentrancy), the PocGenerator writes runnable Foundry exploit tests to prove the findings are real, the RemediationAdvisor rewrites the contract to fix every critical issue, and the ReportPublisher synthesizes everything into an executive risk report. The agents message each other in the room, hand off context, and reach a verdict together — Band is the actual coordination layer, not a notification wrapper. Under the hood, each agent wraps a LangGraph pipeline combining rule-based detection (35+ SWC vulnerability signatures), LLM reasoning — Claude Opus and Sonnet for deep analysis, Gemini for fix generation — and a FAISS RAG engine grounded in the SWC Registry and 50+ real DeFi exploits. The stack is model-agnostic (OpenAI also supported for evaluation), with a roadmap toward fine-tuned and self-hosted local models for lower cost and full privacy. A second Sentinel Mode delivers 24/7 on-chain monitoring with a live transaction feed and threat alerting via Telegram and Discord. DeFi lost over $2.2B to smart-contract exploits in 2024. Traditional audits cost $30k–$100k and take weeks, pricing out most teams. ChainSentinel makes attacker-grade security continuous, explainable, and affordable — and shows what a fleet of specialized agents collaborating on Band can deliver for high-stakes, regulated workflows.