[Suggestion] tRPC real-time streaming transcription with WebSocket subscriptions (TypeScript)

[deepgram-robot]

What to build

A full-stack TypeScript application using tRPC with WebSocket subscriptions to stream real-time Deepgram transcription results from server to client with end-to-end type safety.

Why this matters

tRPC is the standard type-safe API layer for TypeScript full-stack applications, powering the T3 stack and widely adopted with Next.js, Nuxt, and standalone setups. Developers using tRPC expect their audio transcription pipeline to be fully typed from server-side Deepgram SDK calls through to client-side transcript rendering. tRPC's WebSocket subscription model is a natural fit for streaming transcription, but no reference implementation exists showing how to bridge Deepgram's streaming WebSocket with tRPC's subscription pattern.

Suggested scope

• Framework: tRPC v11 with WebSocket adapter
• Language: TypeScript (end-to-end type safety)
• Server: Node.js with @trpc/server and ws adapter
• Client: React with @trpc/react-query
• Deepgram APIs: Streaming STT (Nova-3 or Flux)
• Architecture: tRPC router with transcription.stream subscription procedure; server connects to Deepgram WebSocket and relays typed results through tRPC subscription; client consumes via trpc.transcription.stream.useSubscription()
• Complexity: Medium — demonstrates the tRPC WebSocket subscription + Deepgram streaming bridge pattern

Acceptance criteria

• Runnable with minimal setup (clone, add API key, run)
• README explains the pattern clearly
• Uses current SDK version
• Full end-to-end TypeScript type safety (Deepgram response types flow through tRPC to client)
• Demonstrates interim and final transcript results via tRPC subscription
• Includes microphone capture on the client side

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Raised by the DX intelligence system.