Pulse STT

Send {"type": "close_stream"} to end a Pulse STT session. The server flushes remaining audio, emits final transcripts, responds with is_last=true, then closes the WebSocket.

{"type": "finalize"} is now documented as a mid-session flush: it returns an is_final=true transcript for buffered audio while keeping the session open for more input. Prior docs conflated the two.

Code examples in Python, Node.js, and browser JavaScript were updated to use close_stream when ending the stream.

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