From 50a4d43185ec7c6ef40558e40cfe44c10c6386f6 Mon Sep 17 00:00:00 2001
From: "rosetta-livekit-bot[bot]"
 <282703043+rosetta-livekit-bot[bot]@users.noreply.github.com>
Date: Thu, 11 Jun 2026 18:18:44 +0000
Subject: [PATCH] fix(elevenlabs): include stream request flags

---
 .changeset/elevenlabs-stream-flags.md |  5 +++++
 plugins/elevenlabs/src/tts.ts         | 13 +++++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/elevenlabs-stream-flags.md

diff --git a/.changeset/elevenlabs-stream-flags.md b/.changeset/elevenlabs-stream-flags.md
new file mode 100644
index 000000000..110e16948
--- /dev/null
+++ b/.changeset/elevenlabs-stream-flags.md
@@ -0,0 +1,5 @@
+---
+'@livekit/agents-plugin-elevenlabs': patch
+---
+
+Add missing ElevenLabs streaming request flags for normalization and logging.
diff --git a/plugins/elevenlabs/src/tts.ts b/plugins/elevenlabs/src/tts.ts
index 84e13ef3c..00a0fc44a 100644
--- a/plugins/elevenlabs/src/tts.ts
+++ b/plugins/elevenlabs/src/tts.ts
@@ -136,8 +136,8 @@ function sampleRateFromFormat(encoding: TTSEncoding): number {
 }
 
 function synthesizeUrl(opts: ResolvedTTSOptions): string {
-  const { baseURL, voiceId, model, encoding, streamingLatency } = opts;
-  let url = `${baseURL}/text-to-speech/${voiceId}/stream?model_id=${model}&output_format=${encoding}`;
+  const { baseURL, voiceId, encoding, streamingLatency } = opts;
+  let url = `${baseURL}/text-to-speech/${voiceId}/stream?output_format=${encoding}&enable_logging=${String(opts.enableLogging).toLowerCase()}`;
   if (streamingLatency !== undefined) {
     url += `&optimize_streaming_latency=${streamingLatency}`;
   }
@@ -837,6 +837,13 @@ export class ChunkedStream extends tts.ChunkedStream {
     const voiceSettings = this.#opts.voiceSettings
       ? stripUndefined(this.#opts.voiceSettings)
       : undefined;
+    const extraParams: Record<string, string | boolean> = {};
+    if (this.#opts.language) {
+      extraParams.language_code = getBaseLanguage(this.#opts.language);
+    }
+    if (this.#opts.applyLanguageTextNormalization !== undefined) {
+      extraParams.apply_language_text_normalization = this.#opts.applyLanguageTextNormalization;
+    }
 
     const requestId = shortuuid();
     const bstream = new AudioByteStream(this.#opts.sampleRate, 1);
@@ -852,6 +859,8 @@ export class ChunkedStream extends tts.ChunkedStream {
           text: this.inputText,
           model_id: this.#opts.model,
           voice_settings: voiceSettings,
+          apply_text_normalization: this.#opts.applyTextNormalization,
+          ...extraParams,
         }),
         signal: this.abortSignal,
       });