Neko Master is a production-grade traffic analytics platform for Clash/Mihomo and Surge proxy gateways. It collects real-time connection data via WebSocket or HTTP polling, aggregates it in SQLite (always) and optionally ClickHouse, and serves a rich dashboard built with Next.js 16, React 19, and Tailwind CSS. The system supports both direct collector-to-gateway mode and a Go-based agent mode for remote or isolated networks. The backend is a Fastify 5 server with WebSocket push, repository-patterned database access, in-memory realtime store, and health-aware dual-write routing. The frontend provides per-domain, per-IP, per-proxy, per-rule, per-country, and per-device statistics with time-range filtering, pagination, charts, and interactive visualizations including a DAG rule-chain flow. The project is a monorepo with pnpm and Turborepo, including a shared TypeScript types package and extensive CI/CD. While primarily an application, it has strong data-engineering aspects: batch buffering, time-series aggregation, GeoIP enrichment, and ClickHouse integration for large-scale deployments.