Baseten Plugin Update: fix metadata schema, add chain_id support, and improve response parsing#4889
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jiegong-fde wants to merge 4 commits intolivekit:mainfrom
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Baseten Plugin Update: fix metadata schema, add chain_id support, and improve response parsing#4889jiegong-fde wants to merge 4 commits intolivekit:mainfrom
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A side note: I've signed the cla but somehow it shows unsigned |
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Summary
Updates the Baseten STT plugin to align with Baseten's current Streaming Transcription API, adds ergonomic endpoint configuration via
model_id/chain_idparameters, and significantly expands the README documentation.Motivation: The existing plugin had several issues that prevented it from working correctly with Baseten's streaming ASR API:
Wrong metadata field names — The plugin sent vad_params and streaming_whisper_params in the WebSocket metadata, but Baseten's StreamingWhisperInput schema (which uses extra="forbid") expects whisper_params, streaming_params, streaming_vad_config, and streaming_diarization_config. This caused the connection to be rejected outright.
No chain deployment support — Users had to manually construct WebSocket URLs. There was no way to specify a chain ID, which is the recommended deployment type for Baseten's streaming ASR.
Missing streaming parameters — Options like enable_partial_transcripts, partial_transcript_interval_s, show_word_timestamps, and final_transcript_max_duration_s were not exposed, limiting configurability.
Incomplete response parsing — The plugin didn't handle chain responses (which lack a top-level transcript field and include a "type": "transcription" wrapper), nor did it extract word-level timestamps from word_timestamps within segments.