# JavaScript SDK v5.15.0 By Steven Van · 2026-10-12 Developers can update Nova-3 keyterms mid-stream and exchange experimental custom Think-provider messages in Voice Agent sessions. Active Nova-3 streams can now change keyterms and numerals without reconnecting in [Deepgram]()’s JavaScript SDK v5.15.0. The [release]() also adds experimental custom Think-provider messages for Voice Agent sessions and fixes connection retry behavior. ## Reconfigure live streams For live Listen V1 streams, sendConfigure({ type: "Configure", ... }) updates the stream’s configuration. Each Configure message replaces its keyterms and can turn formatting options on or off through a features object, such as "features": { "numerals": true }. Mid-stream keyterm updates are available only on the global endpoint, api.deepgram.com. Configure rejections arrive as typed ListenV1Error messages. ## Exchange custom Think-provider messages Voice Agent sessions can send experimental custom payloads with sendCustomToThinkProvider(...) and receive AgentV1CustomFromThinkProvider messages. This requires a configured custom Think-provider wss:// endpoint owned by the application. ## Connection retry fixes WebSocket connection errors now retry through the configured reconnectAttempts budget unless the application explicitly closed the socket. For custom transports, the retry budget resets after a connection stays open for the default five-second stable period. Unstable connections still stop after reconnectAttempts. ![Deepgram]() Deepgram Power enterprise voice solutions with Deepgram’s Speech-to-Text, Text-to-Speech, and Voice Agent APIs. Real-time, accurate, and built for scale. [View Deepgram →]() [Original source]() [Read JavaScript SDK v5.15.0 on Creators Toolbox]() --- Canonical source: https://creatorstoolbox.com/blog/deepgram-javascript-sdk-v5-15-0