From 57cdd8ed0f46f33d83f4fbf103080de7b4e1da84 Mon Sep 17 00:00:00 2001
From: rhonda hollis <rhonda@jambonz.org>
Date: Fri, 15 May 2026 13:00:29 -0700
Subject: [PATCH] ensure session end at Ultravox

---
 lib/tasks/llm/llms/ultravox_s2s.js | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/lib/tasks/llm/llms/ultravox_s2s.js b/lib/tasks/llm/llms/ultravox_s2s.js
index 4c8ec939..688e0dae 100644
--- a/lib/tasks/llm/llms/ultravox_s2s.js
+++ b/lib/tasks/llm/llms/ultravox_s2s.js
@@ -146,6 +146,25 @@ class TaskLlmUltravox_S2S extends Task {
     return data;
   }
 
+  async hangupCall() {
+    if (!this.callId || this._hangupSent) return;
+    this._hangupSent = true;
+    const url = `https://api.ultravox.ai/api/calls/${this.callId}/send_data_message`;
+    try {
+      const {statusCode} = await request(url, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'X-API-Key': this.apiKey
+        },
+        body: JSON.stringify({type: 'hang_up'})
+      });
+      this.logger.debug({statusCode, callId: this.callId}, 'TaskLlmUltravox_S2S:hangupCall - sent hang_up');
+    } catch (err) {
+      this.logger.info({err, callId: this.callId}, 'TaskLlmUltravox_S2S:hangupCall - error');
+    }
+  }
+
   _unregisterHandlers(ep) {
     this.removeCustomEventListeners();
     ep.removeAllListeners('dtmf');
@@ -164,6 +183,7 @@ class TaskLlmUltravox_S2S extends Task {
 
     try {
       const data = await this.createCall();
+      this.callId = data.callId;
       const {joinUrl} = data;
       // split the joinUrl into host and path
       const {host, pathname, search} = new URL(joinUrl);
@@ -188,6 +208,8 @@ class TaskLlmUltravox_S2S extends Task {
 
     await this.awaitTaskDone();
 
+    await this.hangupCall();
+
     /* note: the parent llm verb started the span, which is why this is necessary */
     await this.parent.performAction(this.results);
 
@@ -200,6 +222,8 @@ class TaskLlmUltravox_S2S extends Task {
     this._api(cs.ep, [cs.ep.uuid, SessionDelete])
       .catch((err) => this.logger.info({err}, 'TaskLlmUltravox_S2S:kill - error deleting session'));
 
+    this.hangupCall();
+
     this.notifyTaskDone();
   }