Commands

Commands are structured request/response messages - like RPC over WebSockets.

Clients send a named command with a payload, and the server responds. Use commands for things like auth, data fetching, or state updates.

Server: expose a command

server.exposeCommand("echo", async (ctx) => {
  return `echo: ${ctx.payload}`;
});

Client: send a command

const response = await client.command("echo", "Hello!");
console.log(response); // "echo: Hello!"

Features

• Built-in request/response
• Async/await or sync API
• Structured error handling
• Middleware support (validation, auth, etc.)
• Context includes payload, connection, and metadata

See Server SDK → Commands and Client SDK → Commands for full usage details.