fix: return TwiML for outbound conversation calls

extensions/voice-call/src/providers/twilio.test.ts

@@ -0,0 +1,64 @@
+import { describe, expect, it } from "vitest";
+
+import type { WebhookContext } from "../types.js";
+import { TwilioProvider } from "./twilio.js";
+
+const STREAM_URL = "wss://example.ngrok.app/voice/stream";
+
+function createProvider(): TwilioProvider {
+  return new TwilioProvider(
+    { accountSid: "AC123", authToken: "secret" },
+    { publicUrl: "https://example.ngrok.app", streamPath: "/voice/stream" },
+  );
+}
+
+function createContext(
+  rawBody: string,
+  query?: WebhookContext["query"],
+): WebhookContext {
+  return {
+    headers: {},
+    rawBody,
+    url: "https://example.ngrok.app/voice/twilio",
+    method: "POST",
+    query,
+  };
+}
+
+describe("TwilioProvider", () => {
+  it("returns streaming TwiML for outbound conversation calls before in-progress", () => {
+    const provider = createProvider();
+    const ctx = createContext("CallStatus=initiated&Direction=outbound-api", {
+      callId: "call-1",
+    });
+
+    const result = provider.parseWebhookEvent(ctx);
+
+    expect(result.providerResponseBody).toContain(STREAM_URL);
+    expect(result.providerResponseBody).toContain("<Connect>");
+  });
+
+  it("returns empty TwiML for status callbacks", () => {
+    const provider = createProvider();
+    const ctx = createContext("CallStatus=ringing&Direction=outbound-api", {
+      callId: "call-1",
+      type: "status",
+    });
+
+    const result = provider.parseWebhookEvent(ctx);
+
+    expect(result.providerResponseBody).toBe(
+      '<?xml version="1.0" encoding="UTF-8"?><Response></Response>',
+    );
+  });
+
+  it("returns streaming TwiML for inbound calls", () => {
+    const provider = createProvider();
+    const ctx = createContext("CallStatus=ringing&Direction=inbound");
+
+    const result = provider.parseWebhookEvent(ctx);
+
+    expect(result.providerResponseBody).toContain(STREAM_URL);
+    expect(result.providerResponseBody).toContain("<Connect>");
+  });
+});

extensions/voice-call/src/providers/twilio.ts

@@ -294,6 +294,7 @@ export class TwilioProvider implements VoiceCallProvider {
     const isStatusCallback = type === "status";
     const callStatus = params.get("CallStatus");
     const direction = params.get("Direction");
+    const isOutbound = direction?.startsWith("outbound") ?? false;
     const callIdFromQuery =
       typeof ctx.query?.callId === "string" && ctx.query.callId.trim()
         ? ctx.query.callId.trim()
@@ -313,6 +314,14 @@ export class TwilioProvider implements VoiceCallProvider {
       if (this.notifyCalls.has(callIdFromQuery)) {
         return TwilioProvider.EMPTY_TWIML;
       }
+
+      // Conversation mode: return streaming TwiML immediately for outbound calls.
+      if (isOutbound) {
+        const streamUrl = this.getStreamUrl();
+        return streamUrl
+          ? this.getStreamConnectXml(streamUrl)
+          : TwilioProvider.PAUSE_TWIML;
+      }
     }
 
     // Status callbacks should not receive TwiML.