speechmatics support end_of_utterance_silence_trigger (#1499)

* speechmatics support end_of_utterance_silence_trigger

* wip

lib/session/call-info.js

@@ -12,6 +12,7 @@ class CallInfo {
     let srf;
     this.direction = opts.direction;
     this.traceId = opts.traceId;
+    this.hasRecording = false;
     this.callTerminationBy = undefined;
     if (opts.req) {
       const u = opts.req.getParsedHeader('from');

lib/session/call-session.js

@@ -756,69 +756,101 @@ class CallSession extends Emitter {
     return this._fillerNoise;
   }
 
-  async pauseOrResumeBackgroundListenIfRequired(action, silence = false) {
-    if ((action == 'pauseCallRecording' || action == 'resumeCallRecording') &&
-    this.backgroundTaskManager.isTaskRunning('record')) {
-      this.logger.debug({action, silence}, 'CallSession:pauseOrResumeBackgroundListenIfRequired');
-      const backgroundListenTask = this.backgroundTaskManager.getTask('record');
-      const status = action === 'pauseCallRecording' ? ListenStatus.Pause : ListenStatus.Resume;
-      backgroundListenTask.updateListen(
-        status,
-        silence
-      );
-    }
-  }
 
   async notifyRecordOptions(opts) {
-    const {action, silence} = opts;
+    const {action, silence = false, type = 'siprec'} = opts;
     this.logger.debug({opts}, 'CallSession:notifyRecordOptions');
 
-    this.pauseOrResumeBackgroundListenIfRequired(action, silence);
-
-    /* if we have not answered yet, just save the details for later */
-    if (!this.dlg) {
-      if (action === 'startCallRecording') {
-        this.recordOptions = opts;
-        return true;
+    if (type == 'cloud') {
+      switch (action) {
+        case 'pauseCallRecording':
+          if (this.backgroundTaskManager.isTaskRunning('record')) {
+            this.logger.debug({action, silence, type}, 'CallSession:cloudRecording');
+            const backgroundListenTask = this.backgroundTaskManager.getTask('record');
+            backgroundListenTask.updateListen(
+              ListenStatus.Pause,
+              silence
+            );
+            return true;
+          } else { return false; }
+        case 'resumeCallRecording':
+          if (this.backgroundTaskManager.isTaskRunning('record')) {
+            this.logger.debug({action, silence, type}, 'CallSession:cloudRecording');
+            const backgroundListenTask = this.backgroundTaskManager.getTask('record');
+            backgroundListenTask.updateListen(
+              ListenStatus.Resume,
+              silence
+            );
+            return true;
+          } else { return false; }
+        case 'startCallRecording':
+          if (!this.backgroundTaskManager.isTaskRunning('record')) {
+            this.logger.debug({action, silence, type}, 'CallSession:cloudRecording');
+            this.callInfo.hasRecording = true;
+            this.updateCallStatus(Object.assign({}, this.callInfo.toJSON()), this.serviceUrl)
+              .catch((err) => this.logger.error(err, 'redis error'));
+            if (!this.dlg) {
+              // Call not yet answered so set flag to record on status change
+              this.application.record_all_calls = true;
+            } else {
+              this.backgroundTaskManager.newTask('record');
+            }
+            return true;
+          } else { return false; }
+        case 'stopCallRecording':
+          if (this.backgroundTaskManager.isTaskRunning('record')) {
+            this.logger.debug({action, silence, type}, 'CallSession:cloudRecording');
+            this.backgroundTaskManager.stop('record');
+            return true;
+          } else { return false; }
+      }
+    } else {
+      // SIPREC
+      /* if we have not answered yet, just save the details for later */
+      if (!this.dlg) {
+        if (action === 'startCallRecording') {
+          this.recordOptions = opts;
+          return true;
+        }
+        return false;
       }
-      return false;
-    }
 
-    /* check validity of request */
-    if (action == 'startCallRecording' && this.recordState !== RecordState.RecordingOff) {
-      this.logger.info({recordState: this.recordState},
-        'CallSession:notifyRecordOptions: recording is already started, ignoring request');
-      return false;
-    }
-    if (action == 'stopCallRecording' && this.recordState === RecordState.RecordingOff) {
-      this.logger.info({recordState: this.recordState},
-        'CallSession:notifyRecordOptions: recording is already stopped, ignoring request');
-      return false;
-    }
-    if (action == 'pauseCallRecording' && this.recordState !== RecordState.RecordingOn) {
-      this.logger.info({recordState: this.recordState},
-        'CallSession:notifyRecordOptions: cannot pause recording, ignoring request ');
-      return false;
-    }
-    if (action == 'resumeCallRecording' && this.recordState !== RecordState.RecordingPaused) {
-      this.logger.info({recordState: this.recordState},
-        'CallSession:notifyRecordOptions: cannot resume recording, ignoring request ');
-      return false;
-    }
+      /* check validity of request */
+      if (action == 'startCallRecording' && this.recordState !== RecordState.RecordingOff) {
+        this.logger.info({recordState: this.recordState},
+          'CallSession:notifyRecordOptions: recording is already started, ignoring request');
+        return false;
+      }
+      if (action == 'stopCallRecording' && this.recordState === RecordState.RecordingOff) {
+        this.logger.info({recordState: this.recordState},
+          'CallSession:notifyRecordOptions: recording is already stopped, ignoring request');
+        return false;
+      }
+      if (action == 'pauseCallRecording' && this.recordState !== RecordState.RecordingOn) {
+        this.logger.info({recordState: this.recordState},
+          'CallSession:notifyRecordOptions: cannot pause recording, ignoring request ');
+        return false;
+      }
+      if (action == 'resumeCallRecording' && this.recordState !== RecordState.RecordingPaused) {
+        this.logger.info({recordState: this.recordState},
+          'CallSession:notifyRecordOptions: cannot resume recording, ignoring request ');
+        return false;
+      }
 
-    this.recordOptions = opts;
+      this.recordOptions = opts;
 
-    switch (action) {
-      case 'startCallRecording':
-        return await this.startRecording();
-      case 'stopCallRecording':
-        return await this.stopRecording();
-      case 'pauseCallRecording':
-        return await this.pauseRecording();
-      case 'resumeCallRecording':
-        return await this.resumeRecording();
-      default:
-        throw new Error(`invalid record action ${action}`);
+      switch (action) {
+        case 'startCallRecording':
+          return await this.startRecording();
+        case 'stopCallRecording':
+          return await this.stopRecording();
+        case 'pauseCallRecording':
+          return await this.pauseRecording();
+        case 'resumeCallRecording':
+          return await this.resumeRecording();
+        default:
+          throw new Error(`invalid record action ${action}`);
+      }
     }
   }
 
@@ -1050,7 +1082,7 @@ class CallSession extends Emitter {
             const cred = JSON.parse(credential.service_key.replace(/\n/g, '\\n'));
             return {
               speech_credential_sid: credential.speech_credential_sid,
-              credentials: cred
+              credentials: cred,
             };
           } catch (err) {
             const sid = this.accountInfo.account.account_sid;
@@ -2468,6 +2500,36 @@ Duration=${duration} `
       }
       else {
         this.logger.error(err, `Error attempting to allocate endpoint for for task ${task.name}`);
+        // Check for SipError type (e.g., 488 codec incompatibility)
+        const isSipError = err.name === 'SipError';
+        if (isSipError && err.status) {
+          // Extract Reason header from SIP response if available (e.g., Q.850;cause=88;text="INCOMPATIBLE_DESTINATION")
+          const sipReasonHeader = err.res?.msg?.headers?.reason;
+          this._endpointAllocationError = {
+            status: err.status,
+            reason: err.reason || 'Endpoint Allocation Failed',
+            sipReasonHeader
+          };
+          this.logger.info({endpointAllocationError: this._endpointAllocationError},
+            'Captured SipError for propagation to SBC');
+
+          // Send SIP error response immediately for inbound calls
+          if (this.res && !this.res.finalResponseSent) {
+            this.logger.info(`Sending ${err.status} response to SBC due to SipError`);
+            this.res.send(err.status, {
+              headers: {
+                'X-Reason': `endpoint allocation failure: ${err.reason || 'Endpoint Allocation Failed'}`,
+                ...(sipReasonHeader && {'Reason': sipReasonHeader})
+              }
+            });
+            this._notifyCallStatusChange({
+              callStatus: CallStatus.Failed,
+              sipStatus: err.status,
+              sipReason: err.reason || 'Endpoint Allocation Failed'
+            });
+            this._callReleased();
+          }
+        }
         throw new Error(`${BADPRECONDITIONS}: unable to allocate endpoint`);
       }
     }
@@ -2980,8 +3042,7 @@ Duration=${duration} `
 
     // manage record all call.
     if (callStatus === CallStatus.InProgress) {
-      if (this.accountInfo.account.record_all_calls ||
-        this.application.record_all_calls) {
+      if (this.accountInfo.account.record_all_calls || this.application.record_all_calls) {
         this.backgroundTaskManager.newTask('record');
       }
     } else if (callStatus == CallStatus.Completed) {

lib/session/inbound-call-session.js

@@ -60,6 +60,19 @@ class InboundCallSession extends CallSession {
           }
         });
       }
+      else if (this._endpointAllocationError) {
+        // Propagate SIP error from endpoint allocation failure back to the client
+        const {status, reason, sipReasonHeader} = this._endpointAllocationError;
+        this.rootSpan.setAttributes({'call.termination': `endpoint allocation SIP error ${status}`});
+        this.logger.info({endpointAllocationError: this._endpointAllocationError},
+          `InboundCallSession:_onTasksDone generating ${status} due to endpoint allocation failure`);
+        this.res.send(status, {
+          headers: {
+            'X-Reason': `endpoint allocation failure: ${reason}`,
+            ...(sipReasonHeader && {'Reason': sipReasonHeader})
+          }
+        });
+      }
       else {
         this.rootSpan.setAttributes({'call.termination': 'tasks completed without answering call'});
         this.logger.info('InboundCallSession:_onTasksDone auto-generating non-success response to invite');

lib/tasks/gather.js

@@ -500,6 +500,10 @@ class TaskGather extends SttTask {
         this.addCustomEventListener(ep, GladiaTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep));
         this.addCustomEventListener(ep, GladiaTranscriptionEvents.Error, this._onVendorError.bind(this, cs, ep));
+        // gladia require unique url for each session
+        const {host, path} = await this.createGladiaLiveSession();
+        opts.GLADIA_SPEECH_HOST = host;
+        opts.GLADIA_SPEECH_PATH = path;
         break;
 
       case 'soniox':

lib/tasks/redirect.js

@@ -1,7 +1,6 @@
 const Task = require('./task');
 const {TaskName} = require('../utils/constants');
 const WsRequestor = require('../utils/ws-requestor');
-const URL = require('url');
 const HttpRequestor = require('../utils/http-requestor');
 
 /**
@@ -10,6 +9,7 @@ const HttpRequestor = require('../utils/http-requestor');
 class TaskRedirect extends Task {
   constructor(logger, opts) {
     super(logger, opts);
+    this.statusHook = opts.statusHook || false;
   }
 
   get name() { return TaskName.Redirect; }
@@ -33,7 +33,7 @@ class TaskRedirect extends Task {
       }
       else {
         const baseUrl =  this.cs.application.requestor.baseUrl;
-        const newUrl = URL.parse(this.actionHook);
+        const newUrl = new URL(this.actionHook);
         const newBaseUrl = newUrl.protocol + '//' + newUrl.host;
         if (baseUrl != newBaseUrl) {
           try {
@@ -47,6 +47,30 @@ class TaskRedirect extends Task {
         }
       }
     }
+
+    /* update the notifier if a new statusHook was provided */
+    if (this.statusHook) {
+      this.logger.info(`TaskRedirect updating statusHook to ${this.statusHook}`);
+      try {
+        const oldNotifier = cs.application.notifier;
+        const isStatusHookAbsolute = cs.notifier?._isAbsoluteUrl(this.statusHook);
+        if (isStatusHookAbsolute) {
+          if (cs.notifier instanceof WsRequestor) {
+            cs.application.notifier = new WsRequestor(this.logger, cs.accountSid, {url: this.statusHook},
+              cs.accountInfo.account.webhook_secret);
+          } else {
+            cs.application.notifier = new HttpRequestor(this.logger, cs.accountSid, {url: this.statusHook},
+              cs.accountInfo.account.webhook_secret);
+          }
+          if (oldNotifier?.close) oldNotifier.close();
+        }
+        /* update the call_status_hook URL that gets passed to the notifier */
+        cs.application.call_status_hook = this.statusHook;
+      } catch (err) {
+        this.logger.info(err, `TaskRedirect error updating statusHook to ${this.statusHook}`);
+      }
+    }
+
     await this.performAction();
   }
 }

lib/tasks/stt-task.js

@@ -203,26 +203,14 @@ class SttTask extends Task {
     if (cs.hasGlobalSttPunctuation && !this.data.recognizer.punctuation) {
       this.data.recognizer.punctuation = cs.globalSttPunctuation;
     }
-    if (this.vendor === 'gladia') {
-      const { api_key, region } = this.sttCredentials;
-      const {url} = await this.createGladiaLiveSession({
-        api_key, region,
-        model: this.data.recognizer.model || 'solaria-1',
-        options: this.data.recognizer.gladiaOptions || {}
-      });
-      const {host, pathname, search} = new URL(url);
-      this.sttCredentials.host = host;
-      this.sttCredentials.path = `${pathname}${search}`;
-    }
   }
 
 
-  async createGladiaLiveSession({
-    api_key,
-    region = 'us-west',
-    model = 'solaria-1',
-    options = {},
-  }) {
+  async createGladiaLiveSession() {
+    const { api_key, region = 'us-west' } = this.sttCredentials;
+    const model = this.data.recognizer.model || 'solaria-1';
+    const options = this.data.recognizer.gladiaOptions || {};
+
     const url = `https://api.gladia.io/v2/live?region=${region}`;
     const response = await fetch(url, {
       method: 'POST',
@@ -252,7 +240,9 @@ class SttTask extends Task {
 
     const data = await response.json();
     this.logger.debug({url: data.url}, 'Gladia Call registered');
-    return data;
+
+    const {host, pathname, search} = new URL(data.url);
+    return {host, path: `${pathname}${search}`};
   }
 
   addCustomEventListener(ep, event, handler) {

lib/tasks/transcribe.js

@@ -459,6 +459,14 @@ class TaskTranscribe extends SttTask {
       else if (this.data.recognizer?.hints?.length > 0) {
         prompt = this.data.recognizer?.hints.join(', ');
       }
+    } else if (this.vendor === 'gladia') {
+      // gladia require unique url for each session
+      const {host, path} = await this.createGladiaLiveSession();
+      await ep.set({
+        GLADIA_SPEECH_HOST: host,
+        GLADIA_SPEECH_PATH: path,
+      })
+        .catch((err) => this.logger.info(err, 'Error setting channel variables'));
     }
 
     await ep.startTranscription({

lib/tasks/tts-task.js

@@ -31,8 +31,9 @@ class TtsTask extends Task {
     this.synthesizer = this.data.synthesizer || {};
     this.disableTtsCache = this.data.disableTtsCache;
     this.options = this.synthesizer.options || {};
-    this.instructions = this.data.instructions;
+    this.instructions = this.data.instructions || this.options.instructions;
     this.playbackIds = [];
+    this.useGeminiTts = this.options.useGeminiTts;
   }
 
   getPlaybackId(offset) {
@@ -242,6 +243,8 @@ class TtsTask extends Task {
       }
     } else if (vendor === 'cartesia') {
       credentials.model_id = this.options.model_id || credentials.model_id;
+    } else if (vendor === 'google') {
+      this.model = this.options.model || credentials.credentials.model_id;
     }
 
     this.model_id = credentials.model_id;

lib/utils/action-hook-delay.js

@@ -118,6 +118,13 @@ class ActionHookDelayProcessor extends Emitter {
     this.logger.debug('ActionHookDelayProcessor#_onNoResponseTimer');
     this._noResponseTimer = null;
 
+    /* check if endpoint is still available (call may have ended) */
+    if (!this.ep) {
+      this.logger.debug('ActionHookDelayProcessor#_onNoResponseTimer: endpoint is null, call may have ended');
+      this._active = false;
+      return;
+    }
+
     /* get the next play or say action */
     const verb = this.actions[this._retryCount % this.actions.length];
 
@@ -129,8 +136,8 @@ class ActionHookDelayProcessor extends Emitter {
       this._taskInProgress.exec(this.cs, {ep: this.ep}).catch((err) => {
         this.logger.info(`ActionHookDelayProcessor#_onNoResponseTimer: error playing file: ${err.message}`);
         this._taskInProgress = null;
-        this.ep.removeAllListeners('playback-start');
-        this.ep.removeAllListeners('playback-stop');
+        this.ep?.removeAllListeners('playback-start');
+        this.ep?.removeAllListeners('playback-stop');
       });
     } catch (err) {
       this.logger.info(err, 'ActionHookDelayProcessor#_onNoResponseTimer: error starting action');

lib/utils/background-task-manager.js

@@ -135,26 +135,24 @@ class BackgroundTaskManager extends Emitter {
 
   // Initiate Record
   async _initRecord() {
-    if (this.cs.accountInfo.account.record_all_calls || this.cs.application.record_all_calls) {
-      if (!JAMBONZ_RECORD_WS_BASE_URL || !this.cs.accountInfo.account.bucket_credential) {
-        this.logger.error('_initRecord: invalid cfg - missing JAMBONZ_RECORD_WS_BASE_URL or bucket config');
-        return undefined;
-      }
-      const listenOpts = {
-        url: `${JAMBONZ_RECORD_WS_BASE_URL}/record/${this.cs.accountInfo.account.bucket_credential.vendor}`,
-        disableBidirectionalAudio: true,
-        mixType : 'stereo',
-        passDtmf: true
-      };
-      if (JAMBONZ_RECORD_WS_USERNAME && JAMBONZ_RECORD_WS_PASSWORD) {
-        listenOpts.wsAuth = {
-          username: JAMBONZ_RECORD_WS_USERNAME,
-          password: JAMBONZ_RECORD_WS_PASSWORD
-        };
-      }
-      this.logger.debug({listenOpts}, '_initRecord: enabling listen');
-      return await this._initListen({verb: 'listen', ...listenOpts}, 'jambonz-session-record', true, 'record');
+    if (!JAMBONZ_RECORD_WS_BASE_URL || !this.cs.accountInfo.account.bucket_credential) {
+      this.logger.error('_initRecord: invalid cfg - missing JAMBONZ_RECORD_WS_BASE_URL or bucket config');
+      return undefined;
     }
+    const listenOpts = {
+      url: `${JAMBONZ_RECORD_WS_BASE_URL}/record/${this.cs.accountInfo.account.bucket_credential.vendor}`,
+      disableBidirectionalAudio: true,
+      mixType : 'stereo',
+      passDtmf: true
+    };
+    if (JAMBONZ_RECORD_WS_USERNAME && JAMBONZ_RECORD_WS_PASSWORD) {
+      listenOpts.wsAuth = {
+        username: JAMBONZ_RECORD_WS_USERNAME,
+        password: JAMBONZ_RECORD_WS_PASSWORD
+      };
+    }
+    this.logger.debug({listenOpts}, '_initRecord: enabling listen');
+    return await this._initListen({verb: 'listen', ...listenOpts}, 'jambonz-session-record', true, 'record');
   }
 
   // Initiate Transcribe

lib/utils/sbc-pinger.js

@@ -120,17 +120,8 @@ module.exports = (logger) => {
       }
       pingProxies(srf);
 
-      // if we have zero calls, we can complete the scale-in right
-      setTimeout(() => {
-        const calls = srf.locals.sessionTracker.count;
-        if (calls === 0) {
-          logger.info('scale-in can complete immediately as we have no calls in progress');
-          process.exit(0);
-        }
-        else {
-          logger.info(`${calls} calls in progress; scale-in will complete when they are done`);
-        }
-      }, 5000);
+      // Note: in response to SIGUSR1 we start drying up but do not exit when calls reach zero.
+      // This is to allow external scripts that sent the signal to manage the lifecycle.
     });
   }
 

lib/utils/transcription-utils.js

@@ -1085,13 +1085,6 @@ module.exports = (logger) => {
         ...(keyterms && keyterms.length > 0 && {DEEPGRAMFLUX_SPEECH_KEYTERMS: keyterms.join(',')}),
       };
     }
-    else if ('gladia' === vendor) {
-      const {host, path} = sttCredentials;
-      opts = {
-        GLADIA_SPEECH_HOST: host,
-        GLADIA_SPEECH_PATH: path,
-      };
-    }
     else if ('soniox' === vendor) {
       const {sonioxOptions = {}} = rOpts;
       const {storage = {}} = sonioxOptions;
@@ -1382,7 +1375,9 @@ module.exports = (logger) => {
             speechmaticsOptions.transcription_config.audio_filtering_config.volume_threshold}),
         ...(speechmaticsOptions.transcription_config?.transcript_filtering_config?.remove_disfluencies &&
           {SPEECHMATICS_REMOVE_DISFLUENCIES:
-            speechmaticsOptions.transcription_config.transcript_filtering_config.remove_disfluencies})
+            speechmaticsOptions.transcription_config.transcript_filtering_config.remove_disfluencies}),
+        SPEECHMATICS_END_OF_UTTERANCE_SILENCE_TRIGGER:
+          speechmaticsOptions.transcription_config?.conversation_config?.end_of_utterance_silence_trigger || 0.5
       };
     }
     else if (vendor.startsWith('custom:')) {

lib/utils/tts-streaming-buffer.js

@@ -220,8 +220,7 @@ class TtsStreamingBuffer extends Emitter {
           this.queue.shift();
         }
         // Immediately send all accumulated text (ignoring sentence boundaries).
-        // Skip sending if flushText is only whitespace.
-        if (flushText.length > 0 && !isWhitespace(flushText)) {
+        if (flushText.length > 0) {
           const modifiedFlushText = flushText.replace(/\n\n/g, '\n \n');
           try {
             await this._api(this.ep, [this.ep.uuid, 'send', modifiedFlushText]);

package-lock.json

@@ -15,10 +15,10 @@
         "@jambonz/http-health-check": "^0.0.1",
         "@jambonz/mw-registrar": "^0.2.7",
         "@jambonz/realtimedb-helpers": "^0.8.15",
-        "@jambonz/speech-utils": "^0.2.26",
+        "@jambonz/speech-utils": "^0.2.30",
         "@jambonz/stats-collector": "^0.1.10",
         "@jambonz/time-series": "^0.2.15",
-        "@jambonz/verb-specifications": "^0.0.122",
+        "@jambonz/verb-specifications": "^0.0.125",
         "@modelcontextprotocol/sdk": "^1.9.0",
         "@opentelemetry/api": "^1.8.0",
         "@opentelemetry/exporter-jaeger": "^1.23.0",
@@ -1333,21 +1333,21 @@
       "license": "MIT"
     },
     "node_modules/@google-cloud/text-to-speech": {
-      "version": "5.8.1",
-      "resolved": "https://registry.npmjs.org/@google-cloud/text-to-speech/-/text-to-speech-5.8.1.tgz",
-      "integrity": "sha512-HXyZBtfQq+ETSLwWV/k3zFRWSzt+KEfiC5/OqXNNUed+lU/LEyN0CsqqEmkFfkL8BPsVIMAK2xiYCaDsKENukg==",
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/@google-cloud/text-to-speech/-/text-to-speech-6.4.0.tgz",
+      "integrity": "sha512-KUnK+mBYz9aegxHrBbwEignOkGRqXvqOXs/EGY7CAJhMFKuNSieW02/PV/ipVRsJM11MP69qgTgEetoyAN0HAg==",
       "license": "Apache-2.0",
       "dependencies": {
-        "google-gax": "^4.0.3"
+        "google-gax": "^5.0.0"
       },
       "engines": {
-        "node": ">=14.0.0"
+        "node": ">=18"
       }
     },
     "node_modules/@grpc/grpc-js": {
-      "version": "1.14.2",
-      "resolved": "https://registry.npmjs.org/@grpc/grpc-js/-/grpc-js-1.14.2.tgz",
-      "integrity": "sha512-QzVUtEFyu05UNx2xr0fCQmStUO17uVQhGNowtxs00IgTZT6/W2PBLfUkj30s0FKJ29VtTa3ArVNIhNP6akQhqA==",
+      "version": "1.14.3",
+      "resolved": "https://registry.npmjs.org/@grpc/grpc-js/-/grpc-js-1.14.3.tgz",
+      "integrity": "sha512-Iq8QQQ/7X3Sac15oB6p0FmUg/klxQvXLeileoqrTRGJYLV+/9tubbr9ipz0GKHjmXVsgFPo/+W+2cA8eNcR+XA==",
       "license": "Apache-2.0",
       "dependencies": {
         "@grpc/proto-loader": "^0.8.0",
@@ -1405,6 +1405,102 @@
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     "node_modules/teeny-request": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/teeny-request/-/teeny-request-9.0.0.tgz",
-      "integrity": "sha512-resvxdc6Mgb7YEThw6G6bExlXKkv6+YbuzGg9xuXxSgxJF7Ozs+o8Y9+2R3sArdWdW8nOokoQb1yrpFB0pQK2g==",
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/teeny-request/-/teeny-request-10.1.0.tgz",
+      "integrity": "sha512-3ZnLvgWF29jikg1sAQ1g0o+lr5JX6sVgYvfUJazn7ZjJroDBUTWp44/+cFVX0bULjv4vci+rBD+oGVAkWqhUbw==",
       "license": "Apache-2.0",
       "dependencies": {
         "http-proxy-agent": "^5.0.0",
         "https-proxy-agent": "^5.0.0",
-        "node-fetch": "^2.6.9",
-        "stream-events": "^1.0.5",
-        "uuid": "^9.0.0"
+        "node-fetch": "^3.3.2",
+        "stream-events": "^1.0.5"
       },
       "engines": {
-        "node": ">=14"
+        "node": ">=18"
       }
     },
     "node_modules/teeny-request/node_modules/agent-base": {
@@ -10124,17 +10490,22 @@
         "node": ">= 6"
       }
     },
-    "node_modules/teeny-request/node_modules/uuid": {
-      "version": "9.0.1",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-9.0.1.tgz",
-      "integrity": "sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==",
-      "funding": [
-        "https://github.com/sponsors/broofa",
-        "https://github.com/sponsors/ctavan"
-      ],
+    "node_modules/teeny-request/node_modules/node-fetch": {
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.3.2.tgz",
+      "integrity": "sha512-dRB78srN/l6gqWulah9SrxeYnxeddIG30+GOqK/9OlLVyLg3HPnr6SqOWTWOXKRwC2eGYCkZ59NNuSgvSrpgOA==",
       "license": "MIT",
-      "bin": {
-        "uuid": "dist/bin/uuid"
+      "dependencies": {
+        "data-uri-to-buffer": "^4.0.0",
+        "fetch-blob": "^3.1.4",
+        "formdata-polyfill": "^4.0.10"
+      },
+      "engines": {
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/node-fetch"
       }
     },
     "node_modules/test-exclude": {
@@ -10845,6 +11216,24 @@
         "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
       }
     },
+    "node_modules/wrap-ansi-cjs": {
+      "name": "wrap-ansi",
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
+      "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
+      }
+    },
     "node_modules/wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",

package.json

@@ -31,10 +31,10 @@
     "@jambonz/http-health-check": "^0.0.1",
     "@jambonz/mw-registrar": "^0.2.7",
     "@jambonz/realtimedb-helpers": "^0.8.15",
-    "@jambonz/speech-utils": "^0.2.26",
+    "@jambonz/speech-utils": "^0.2.30",
     "@jambonz/stats-collector": "^0.1.10",
     "@jambonz/time-series": "^0.2.15",
-    "@jambonz/verb-specifications": "^0.0.122",
+    "@jambonz/verb-specifications": "^0.0.125",
     "@modelcontextprotocol/sdk": "^1.9.0",
     "@opentelemetry/api": "^1.8.0",
     "@opentelemetry/exporter-jaeger": "^1.23.0",

test/index.js

@@ -4,7 +4,6 @@ require('./ws-requestor-unit-test');
 require('./http-requestor-retry-test');
 require('./http-requestor-unit-test');
 require('./unit-tests');
-require('./tts-streaming-buffer-test');
 require('./docker_start');
 require('./create-test-db');
 require('./account-validation-tests');

test/tts-streaming-buffer-test.js

@@ -1,177 +0,0 @@
-const test = require('tape');
-const sinon = require('sinon');
-
-const noop = () => {};
-const logger = {
-  error: noop,
-  info: noop,
-  debug: noop
-};
-
-const {
-  TtsStreamingConnectionStatus
-} = require('../lib/utils/constants.json');
-
-const TtsStreamingBuffer = require('../lib/utils/tts-streaming-buffer');
-
-// Helper to create a mock CallSession
-function createMockCs(options = {}) {
-  const mockEp = {
-    uuid: 'test-uuid-1234',
-    api: sinon.stub().resolves({ body: '+OK' }),
-    addCustomEventListener: sinon.stub(),
-    removeCustomEventListener: sinon.stub()
-  };
-
-  return {
-    logger,
-    ep: mockEp,
-    isTtsStreamOpen: options.isTtsStreamOpen !== undefined ? options.isTtsStreamOpen : true,
-    getTsStreamingVendor: () => options.vendor || 'deepgram'
-  };
-}
-
-/**
- * BUG REPRODUCTION TEST
- *
- * This test reproduces the exact issue from production logs:
- * {
- *   "args": ["uuid", "send", " "],
- *   "msg": "Error calling uuid_deepgram_tts_streaming: -USAGE: <uuid> connect|send|clear|close [tokens]"
- * }
- *
- * Root cause: When multiple flushes are queued while connecting, and a space token
- * gets buffered between flushes, Phase 1 of _feedQueue sends that space to the TTS vendor.
- *
- * Sequence:
- * 1. bufferTokens('Hello.') while connecting
- * 2. flush() while connecting
- * 3. bufferTokens(' ') while connecting (passes because bufferedLength > 0)
- * 4. flush() while connecting
- * 5. Connection completes, _feedQueue processes: [text:Hello., flush, text:" ", flush]
- * 6. First flush sends "Hello." - OK
- * 7. Second flush sends " " - BUG!
- */
-test('TtsStreamingBuffer: multiple flushes while connecting - space token sent to TTS vendor', async(t) => {
-  const cs = createMockCs();
-  const buffer = new TtsStreamingBuffer(cs);
-
-  buffer._connectionStatus = TtsStreamingConnectionStatus.Connecting;
-  buffer.vendor = 'deepgram';
-
-  const apiCalls = [];
-  const originalApi = buffer._api.bind(buffer);
-  buffer._api = async function(ep, args) {
-    apiCalls.push({ args: [...args] });
-    return originalApi(ep, args);
-  };
-
-  // First batch while connecting
-  await buffer.bufferTokens('Hello.');
-  buffer.flush();
-
-  // Second batch - just a space (passes because bufferedLength > 0)
-  await buffer.bufferTokens(' ');
-  buffer.flush();
-
-  // Verify queue state before connect
-  t.equal(buffer.queue.length, 4, 'queue should have 4 items: [text, flush, text, flush]');
-  t.equal(buffer.queue[0].type, 'text', 'first item should be text');
-  t.equal(buffer.queue[0].value, 'Hello.', 'first text should be "Hello."');
-  t.equal(buffer.queue[1].type, 'flush', 'second item should be flush');
-  t.equal(buffer.queue[2].type, 'text', 'third item should be text');
-  t.equal(buffer.queue[2].value, ' ', 'third item should be space');
-  t.equal(buffer.queue[3].type, 'flush', 'fourth item should be flush');
-
-  // Connect - triggers _feedQueue
-  buffer._connectionStatus = TtsStreamingConnectionStatus.Connected;
-  await buffer._feedQueue();
-
-  // Check API calls
-  const sendCalls = apiCalls.filter(call => call.args[1] === 'send');
-
-  // This assertion will FAIL until the bug is fixed
-  const whitespaceOnlySends = sendCalls.filter(call => /^\s*$/.test(call.args[2]));
-
-  t.equal(whitespaceOnlySends.length, 0,
-    `should not send whitespace-only tokens, but sent: ${whitespaceOnlySends.map(c => JSON.stringify(c.args[2])).join(', ')}`);
-
-  t.end();
-});
-
-/**
- * Additional test: Verify text with trailing space in same flush is OK
- */
-test('TtsStreamingBuffer: text with trailing space in same flush should work', async(t) => {
-  const cs = createMockCs();
-  const buffer = new TtsStreamingBuffer(cs);
-
-  buffer._connectionStatus = TtsStreamingConnectionStatus.Connecting;
-  buffer.vendor = 'deepgram';
-
-  const apiCalls = [];
-  const originalApi = buffer._api.bind(buffer);
-  buffer._api = async function(ep, args) {
-    apiCalls.push({ args: [...args] });
-    return originalApi(ep, args);
-  };
-
-  // Buffer text with trailing space, then flush
-  await buffer.bufferTokens('Hello.');
-  await buffer.bufferTokens(' ');
-  buffer.flush();
-
-  // Connect
-  buffer._connectionStatus = TtsStreamingConnectionStatus.Connected;
-  await buffer._feedQueue();
-
-  const sendCalls = apiCalls.filter(call => call.args[1] === 'send');
-
-  t.equal(sendCalls.length, 1, 'should have one send call');
-  t.equal(sendCalls[0].args[2], 'Hello. ', 'should send "Hello. " (text with trailing space)');
-
-  t.end();
-});
-
-/**
- * Test: Leading whitespace should be discarded when buffer is empty
- */
-test('TtsStreamingBuffer: leading whitespace discarded when buffer empty', async(t) => {
-  const cs = createMockCs();
-  const buffer = new TtsStreamingBuffer(cs);
-
-  buffer._connectionStatus = TtsStreamingConnectionStatus.Connected;
-  buffer.vendor = 'deepgram';
-
-  // Try to buffer whitespace when buffer is empty
-  const result = await buffer.bufferTokens('   ');
-
-  t.equal(result.status, 'ok', 'should return ok status');
-  t.equal(buffer.bufferedLength, 0, 'buffer should remain empty');
-  t.equal(buffer.queue.length, 0, 'queue should remain empty');
-
-  t.end();
-});
-
-/**
- * Test: Whitespace can be buffered when buffer has content
- */
-test('TtsStreamingBuffer: whitespace accepted when buffer has content', async(t) => {
-  const cs = createMockCs();
-  const buffer = new TtsStreamingBuffer(cs);
-
-  buffer._connectionStatus = TtsStreamingConnectionStatus.Connecting;
-  buffer.vendor = 'deepgram';
-
-  // Buffer real text first
-  await buffer.bufferTokens('Hello');
-
-  // Now buffer whitespace (should pass because bufferedLength > 0)
-  const result = await buffer.bufferTokens(' ');
-
-  t.equal(result.status, 'ok', 'should return ok status');
-  t.equal(buffer.bufferedLength, 6, 'buffer should have 6 chars');
-  t.equal(buffer.queue.length, 2, 'queue should have 2 items');
-
-  t.end();
-});