# Speech-to-text architecture summary

The former synchronous `GroqTranscription` service was retired. Both graph transcription and
automatic audio fallback call the async `execute_stt()` dispatcher. `GroqSTT` is the first
provider adapter; future OpenAI, Deepgram, and ElevenLabs adapters implement the same
`STTClient.execute(request, profile)` protocol.

See [STT_CATALOG.md](STT_CATALOG.md).
