serve.py gains /tts (ElevenLabs synthesis) + /config (advertises tts mode). Client
plays the returned MP3 when ElevenLabs is on, else falls back to browser speechSynthesis;
barge-in stops in-flight audio. Default voice Sarah (free-tier usable); key read from
ELEVENLABS_API_KEY env, never committed. README documents the free-tier library-voice
402 gotcha. Verified: 200 audio/mpeg, 38KB MP3.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
The /ws/chat path builds a fresh Agent that omits the dynamically-registered
peripheral tools (matrix_pattern), so the model improvises with shell/read and the
matrix never changes. Switch the voice client to serve.py, which serves the page and
proxies POST /webhook same-origin to the node gateway (bearer token server-side).
Browser does STT+TTS (Web Speech API, no keys); the agent runs on cloud sonnet and
fires matrix_pattern reliably. Validated end-to-end server-side (checker in 6.2s).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
