Echo plugin

npm install @komaa/standin-sdk
STANDIN_SECRET="your-StandIn-connection-secret" npx standin-echo

import { CallServer, type CallSession } from "@komaa/standin-sdk";

export class EchoHandler {
  #call: CallSession | undefined;

  async onStart(session: CallSession): Promise<void> {
    this.#call = session;
    console.info(
      `call ${session.callId} from ${session.start.caller.displayName ?? "unknown"}`,
    );
  }

  async onCallerAudio(pcm: Buffer): Promise<void> {
    // Your agent goes here. PCM16, 16 kHz, mono, little-endian, the same format
    // sendAudio expects back.
    await this.#call?.sendAudio(pcm);
  }

  async onGoodbye(text: string): Promise<void> {
    // StandIn is ending the call and wants this line spoken first. A real plugin
    // would interrupt the agent and say it.
    console.info(`goodbye: ${text}`);
  }
}

export async function serve(): Promise<void> {
  const server = new CallServer({ handlerFactory: () => new EchoHandler() });
  await server.start();

  await new Promise<void>((resolve) => {
    const stop = (): void => resolve();
    process.once("SIGINT", stop);
    process.once("SIGTERM", stop);
  });

  await server.aclose();
}

async onCallerAudio(pcm: Buffer): Promise<void> {
  const reply = await myFramework.respond(pcm);
  await this.#call?.sendAudio(reply);
}

import { CallServer } from "@komaa/standin-sdk";

const server = new CallServer({ handlerFactory: () => new MyHandler() });
await server.start();