Coulson gives every local project a .local domain. No more localhost:port. echo 3000 > ~/.coulson/myapp → http://myapp.coulson.local - Symlink a Python/Node.js project, server auto-starts on first request - Toggle LAN Access, phone/tablet can reach it via mDNS - coulson tunnel start myapp — instant Cloudflare Tunnel public URL - Built-in request inspector for webhook debugging - One command for local HTTPS Rust + Pingora + Swift. Open source.