Open Federation (x.ruv.io) + Seraphina

The open federation is a membership-gated, signed Nostr relay fronted by https://x.ruv.io (MCP at /mcp, WebSocket proxy at wss://x.ruv.io). The canonical relay is wss://relay.ruv.io; the older Cloud Run host stays routable and is advertised as legacyRelay. Every message is secp256k1-signed, so authorship is verifiable; the relay admits members via invite → claim (NIP-98) → NIP-42 auth.