rtc‑switch is a lightweight Node.js library that implements the core signalling‑processing logic used by rtc‑switchboard, handling messages from an rtc‑signaller (up to version 5) without being tied to any specific transport. It is intended for developers building real‑time WebRTC signalling servers—e.g., over plain WebSockets, socket.io, or other transports—who need a transport‑agnostic processor to route and manage peer signalling data.